A small, electrically powered pump

A large, electrically driven pump (electropump) for waterworks near the Hengsteysee, Germany.

A pump is a device used to move fluids (liquids or gases) or sometimes slurries by mechanical action. Pumps can be classified into three major groups according to the method they use to move the fluid: direct lift, displacement, and gravity pumps.^[1]

Pumps must have a mechanism which operates them, and consume energy to perform mechanical work by moving the fluid. The activating mechanism is often reciprocating or rotary. Pumps may be operated in many ways, including manual operation, electricity, a combustion engine of some type, and wind action.

Types[link]

Positive displacement pump[link]

A lobe pump

lobe pump internals

Mechanism of a scroll pump

A positive displacement pump causes a fluid to move by trapping a fixed amount of it and then forcing (displacing) that trapped volume into the discharge pipe.

Some positive displacement pumps work using an expanding cavity on the suction side and a decreasing cavity on the discharge side. Liquid flows into the pump as the cavity on the suction side expands and the liquid flows out of the discharge as the cavity collapses. The volume is constant given each cycle of operation.

Positive displacement pump behavior and safety[link]

Positive displacement pumps, unlike centrifugal or roto-dynamic pumps, will in theory produce the same flow at a given speed (RPM) no matter what the discharge pressure. Thus, positive displacement pumps are "constant flow machines". However due to a slight increase in internal leakage as the pressure increases, a truly constant flow rate cannot be achieved.

A positive displacement pump must not be operated against a closed valve on the discharge side of the pump, because it has no shut-off head like centrifugal pumps. A positive displacement pump operating against a closed discharge valve will continue to produce flow and the pressure in the discharge line will increase, until the line bursts or the pump is severely damaged, or both.

A relief or safety valve on the discharge side of the positive displacement pump is therefore necessary. The relief valve can be internal or external. The pump manufacturer normally has the option to supply internal relief or safety valves. The internal valve should in general only be used as a safety precaution, an external relief valve installed in the discharge line with a return line back to the suction line or supply tank is recommended.

Positive displacement types[link]

Screw pump

A positive displacement pump can be further classified according to the mechanism used to move the fluid:

• Rotary-type positive displacement: internal gear, screw, shuttle block, flexible vane or sliding vane, circumferential piston, helical twisted roots (e.g. the Wendelkolben pump) or liquid ring vacuum pumps.
• Reciprocating-type positive displacement: piston or diaphragm pumps.
• Linear-type positive displacement: rope pumps and chain pumps.

Rotary positive displacement pumps[link]

Rotary vane pump

Positive displacement rotary pumps move fluid have a rotating mechanism that creates a vacuum that captures and draws in the liquid^{[citation needed]}.

Advantages: Rotary pumps are very efficient^{[citation needed]} because they naturally remove air from the lines, eliminating the need to bleed the air from the lines manually.

Drawbacks: Because of the nature of the pump, the clearance between the rotating pump and the outer edge must be very close, requiring that it rotate at a slow, steady speed. If rotary pumps are operated at high speeds, the fluids will cause erosion, eventually developing enlarged clearances through which liquid can pass, reducing the efficiency of the pump.

Rotary positive displacement pumps can be grouped into three main types:

• Gear pumps - a simple type of rotary pump where the liquid is pushed between two gears.
• Screw pumps - the shape of the internals of this pump usually two screws turning against each other pump the liquid.
• Rotary vane pumps - similar to scroll compressors, consisting of a cylindrical rotor encased in a similarly shaped housing. As the rotor turns, the vanes trap fluid between the rotor and the casing, drawing the fluid through the pump.

Reciprocating positive displacement pumps[link]

Simple hand pump

Hand-operated, reciprocating, positive displacement, water pump in Košice-Ťahanovce, Slovakia (walking beam pump).

Reciprocating pumps are those which cause the fluid to move using one or more oscillating pistons, plungers or membranes (diaphragms), and restrict motion of the fluid to the one desired direction by valves.

Pumps in this category range from "simplex", with one cylinder, to in some cases "quad" (four) cylinders or more. Many reciprocating-type pumps are "duplex" (two) or "triplex" (three) cylinder. They can be either "single-acting" with suction during one direction of piston motion and discharge on the other, or "double-acting" with suction and discharge in both directions. The pumps can be powered manually, by air or steam, or by a belt driven by an engine. This type of pump was used extensively in the early days of steam propulsion (19th century) as boiler feed water pumps. Reciprocating pumps are now typically used for pumping highly viscous fluids including concrete and heavy oils, and special applications demanding low flow rates against high resistance. Reciprocating hand pumps were widely used for pumping water from wells; the common bicycle pump and foot pumps for inflation use reciprocating action.

These positive displacement pumps have an expanding cavity on the suction side and a decreasing cavity on the discharge side. Liquid flows into the pumps as the cavity on the suction side expands and the liquid flows out of the discharge as the cavity collapses. The volume is constant given each cycle of operation.

Typical reciprocating pumps are:

• Plunger pumps - a reciprocating plunger pushes the fluid through one or two open valves, closed by suction on the way back.
• Diaphragm pumps - similar to plunger pumps, where the plunger pressurizes hydraulic oil which is used to flex a diaphragm in the pumping cylinder. Diaphragm valves are used to pump hazardous and toxic fluids.
• Piston displacement pumps - usually simple devices for pumping small amounts of liquid or gel manually. An example is the common hand soap pump.
• Radial piston pump

Various positive displacement pumps[link]

The positive displacement principle applies in the following types of pumps:

• rotary lobe pump
• Progressive cavity pump
• rotary gear pump
• piston pump
• diaphragm pump
• screw pump
• gear pump
• Hydraulic pump
• vane pump
• regenerative (peripheral) pump
• peristaltic pump
• rope pump

Gear pump[link]

Gear pump

This is the simplest of rotary positive displacement pumps. It consists of two meshed gears rotating in a closely fitted casing. Fluid is pumped around the outer periphery by being trapped in the tooth spaces. It does not travel back on the meshed part, since the teeth mesh closely in the centre. It is widely used on car engine oil pumps, and also in various hydraulic power packs.

Screw pump[link]

Screw pumps are a more complicated type of rotary pumps, featuring two or three screws with opposing thread —- that is, one screw turns clockwise, and the other counterclockwise. The screws are each mounted on shafts that run parallel to each other; the shafts also have gears on them that mesh with each other in order to turn the shafts together and keep everything in place. The turning of the screws, and consequently the shafts to which they are mounted, draws the fluid through the pump. As with other forms of rotary pumps, the clearance between moving parts and the pump's casing is minimal.

Progressing cavity pump[link]

Widely used for pumping difficult materials such as sewage sludge contaminated with large particles, this pump consists of a helical shaped rotor, about ten times as long as its width. This can be visualized as a central core of diameter x, with typically a curved spiral wound around of thickness half x, although of course in reality it is made from one casting. This shaft fits inside a heavy duty rubber sleeve, of wall thickness typically x also. As the shaft rotates, fluid is gradually forced up the rubber sleeve. Such pumps can develop very high pressure at quite low volumes.

Roots-type pumps[link]

Named after the Roots brothers who designed and invented it, this lobe pump works by displacing the liquid trapped between two long helical twisted rotors, each fitting into the other when perpendicular at 90°, rotating inside a triangular shaped sealing line configuration, both at the point of suction and at the point of discharge.

This design produces a continuous flow with equal volume and no vortex. It can work at low pulsation rates and results with gentle performance, more fit for some applications.

Some applications are:

• High capacity industrial air compressors
• Roots superchargers on internal combustion engines.
• A brand of civil defense siren, the Federal Signal Corporation's Thunderbolt.

Peristaltic pump[link]

A peristaltic pump is a type of positive displacement pump used for pumping a variety of fluids. The fluid is contained within a flexible tube fitted inside a circular pump casing (though linear peristaltic pumps have been made). A rotor with a number of "rollers", "shoes" or "wipers" attached to the external circumference compresses the flexible tube. As the rotor turns, the part of the tube under compression closes (or "occludes") thus forcing the fluid to be pumped to move through the tube. Additionally, as the tube opens to its natural state after the passing of the cam ("restitution") fluid flow is induced to the pump. This process is called peristalsis and is used in many biological systems such as the gastrointestinal tract.

Plunger pumps[link]

A plunger pump compared to a piston pump

Plunger pumps are reciprocating positive displacement pumps.

They consist of a cylinder with a reciprocating plunger in them. The suction and discharge valves are mounted in the head of the cylinder. In the suction stroke the plunger retracts and the suction valves open causing suction of fluid into the cylinder. In the forward stroke the plunger pushes the liquid out of the discharge valve.

Efficiency and common problems: With only one cylinder in plunger pumps, the fluid flow varies between maximum flow when the plunger moves through the middle positions, and zero flow when the plunger is at the end positions. A lot of energy is wasted when the fluid is accelerated in the piping system. Vibration and "water hammer" may be a serious problem. In general the problems are compensated for by using two or more cylinders not working in phase with each other.

Compressed-air-powered double-diaphragm pumps[link]

One modern application of positive displacement diaphragm pumps is compressed-air-powered double-diaphragm pumps. Run on compressed air these pumps are intrinsically safe by design, although all manufacturers offer ATEX certified models to comply with industry regulation. Commonly seen in all areas of industry from shipping to processing, Wilden Pumps, Graco, SandPiper or ARO are generally the larger of the brands. They are relatively inexpensive and can be used for almost any duty from pumping water out of bunds, to pumping hydrochloric acid from secure storage (dependent on how the pump is manufactured – elastomers / body construction). Lift is normally limited to roughly 6m although heads can reach almost 200 Psi.^{[citation needed]}.

Rope pumps[link]

Devised in China as chain pumps over 1000 years ago, these pumps can be made from very simple materials: A rope, a wheel and a PVC pipe are sufficient to make a simple rope pump. For this reason they have become extremely popular around the world since the 1980s. Rope pump efficiency has been studied by grass roots organizations and the techniques for making and running them have been continuously improved.^[2]

Impulse pumps[link]

The pulser pump

Impulse pumps use pressure created by gas (usually air). In some impulse pumps the gas trapped in the liquid (usually water), is released and accumulated somewhere in the pump, creating a pressure which can push part of the liquid upwards.

Impulse pumps include:

• Hydraulic ram pumps - uses pressure built up internally from released gas in liquid flow. (see below)
• Pulser pumps - run with natural resources, by kinetic energy only.
• Airlift pumps - run on air inserted into pipe, pushing up the water, when bubbles move upward, or on pressure inside pipe pushing water up.

Hydraulic ram pumps[link]

Airlift pump vs. Geyser pump

A hydraulic ram is a water pump powered by hydropower.

It functions as a hydraulic transformer that takes in water at one "hydraulic head" (pressure) and flow-rate, and outputs water at a higher hydraulic-head and lower flow-rate. The device uses the water hammer effect to develop pressure that allows a portion of the input water that powers the pump to be lifted to a point higher than where the water originally started.

The hydraulic ram is sometimes used in remote areas, where there is both a source of low-head hydropower, and a need for pumping water to a destination higher in elevation than the source. In this situation, the ram is often useful, since it requires no outside source of power other than the kinetic energy of flowing water.

Velocity pumps[link]

A centrifugal pump uses a spinning "impeller" which has backward-swept arms

Rotodynamic pumps (or dynamic pumps) are a type of velocity pump in which kinetic energy is added to the fluid by increasing the flow velocity. This increase in energy is converted to a gain in potential energy (pressure) when the velocity is reduced prior to or as the flow exits the pump into the discharge pipe. This conversion of kinetic energy to pressure can be explained by the First law of thermodynamics or more specifically by Bernoulli's principle.

Dynamic pumps can be further subdivided according to the means in which the velocity gain is achieved.^[3]

These types of pumps have a number of characteristics:

1. Continuous energy
2. Conversion of added energy to increase in kinetic energy (increase in velocity)
3. Conversion of increased velocity (kinetic energy) to an increase in pressure head

One practical difference between dynamic and positive displacement pumps is their ability to operate under closed valve conditions. Positive displacement pumps physically displace the fluid; hence closing a valve downstream of a positive displacement pump will result in a continual build up in pressure resulting in mechanical failure of either pipeline or pump. Dynamic pumps differ in that they can be safely operated under closed valve conditions (for short periods of time).

Centrifugal pump[link]

Centrifugal pump

Open Type Centrifugal Pump Impeller

A centrifugal pump is a rotodynamic pump that uses a rotating impeller to increase the pressure and flow rate of a fluid. Centrifugal pumps are the most common type of pump used to move liquids through a piping system. The fluid enters the pump impeller along or near to the rotating axis and is accelerated by the impeller, flowing radially outward or axially into a diffuser or volute chamber, from where it exits into the downstream piping system. Centrifugal pumps are typically used for large discharge through smaller heads.

Centrifugal pumps are most often associated with the radial flow type. However, the term "centrifugal pump" can be used to describe all impeller type rotodynamic pumps^[4] including the radial, axial and mixed flow variations.

Radial flow pumps[link]

Often simply referred to as centrifugal pumps. The fluid enters along the axial plane, is accelerated by the impeller and exits at right angles to the shaft (radially). Radial flow pumps operate at higher pressures and lower flow rates than axial and mixed flow pumps.

Axial flow pumps[link]

Axial pump (propeller in pipe)

Axial flow pumps differ from radial flow in that the fluid enters and exits along the same direction parallel to the rotating shaft. The fluid is not accelerated but instead "lifted" by the action of the impeller. They may be likened to a propeller spinning in a length of tube. Axial flow pumps operate at much lower pressures and higher flow rates than radial flow pumps.

Mixed flow pumps[link]

Mixed flow pumps, as the name suggests, function as a compromise between radial and axial flow pumps, the fluid experiences both radial acceleration and lift and exits the impeller somewhere between 0–90 degrees from the axial direction. As a consequence mixed flow pumps operate at higher pressures than axial flow pumps while delivering higher discharges than radial flow pumps. The exit angle of the flow dictates the pressure head-discharge characteristic in relation to radial and mixed flow.

Eductor-jet pump[link]

This uses a jet, often of steam, to create a low pressure. This low pressure sucks in fluid and propels it into a higher pressure region.

Gravity pumps[link]

Gravity pumps include the syphon and Heron's fountain – and there also important qanat or foggara systems which simply use downhill flow to take water from far-underground aquifers in high areas to consumers at lower elevations. The hydraulic ram is also sometimes referred to as a gravity pump.

Steam pumps[link]

Steam pumps have been for a long time mainly of historical interest. They include any type of pump powered by a steam engine and also pistonless pumps such as Thomas Savery's, the Pulsometer steam pump or the Steam injection pump.

Recently there has been a resurgence of interest in low power solar steam pumps for use in smallholder irrigation in developing countries. Previously small steam engines have not been viable because of escalating inefficiencies as vapour engines decrease in size. However the use of modern engineering materials coupled with alternative engine configurations has meant that these types of system are now a cost effective opportunity.

Valveless pumps[link]

Valveless pumping assists in fluid transport in various biomedical and engineering systems. In a valveless pumping system, no valves are present to regulate the flow direction. The fluid pumping efficiency of a valveless system, however, is not necessarily lower than that having valves. In fact, many fluid-dynamical systems in nature and engineering more or less rely upon valveless pumping to transport the working fluids therein. For instance, blood circulation in the cardiovascular system is maintained to some extent even when the heart’s valves fail. Meanwhile, the embryonic vertebrate heart begins pumping blood long before the development of discernable chambers and valves. In microfluidics, valveless impedance pump have been fabricated, and are expected to be particularly suitable for handling sensitive biofluids.

Pump repairs[link]

Examining pump repair records and MTBF (mean time between failures) is of great importance to responsible and conscientious pump users. In view of that fact, the preface to the 2006 Pump User’s Handbook alludes to "pump failure" statistics. For the sake of convenience, these failure statistics often are translated into MTBF (in this case, installed life before failure).^[5]

In early 2005, Gordon Buck, John Crane Inc.’s chief engineer for Field Operations in Baton Rouge, LA, examined the repair records for a number of refinery and chemical plants to obtain meaningful reliability data for centrifugal pumps. A total of 15 operating plants having nearly 15,000 pumps were included in the survey. The smallest of these plants had about 100 pumps; several plants had over 2000. All facilities were located in the United States. In addition, considered as "new," others as "renewed" and still others as "established." Many of these plants—but not all—had an alliance arrangement with John Crane. In some cases, the alliance contract included having a John Crane Inc. technician or engineer on-site to coordinate various aspects of the program.

Not all plants are refineries, however, and different results can be expected elsewhere. In chemical plants, pumps have traditionally been "throw-away" items as chemical attack can result in limited life. Things have improved in recent years, but the somewhat restricted space available in "old" DIN and ASME-standardized stuffing boxes places limits on the type of seal that can be fitted. Unless the pump user upgrades the seal chamber, only the more compact and simple versions can be accommodated. Without this upgrading, lifetimes in chemical installations are generally believed to be around 50 to 60 percent of the refinery values.

Unscheduled maintenance is often one of the most significant costs of ownership, and failures of mechanical seals and bearings are among the major causes. Keep in mind the potential value of selecting pumps that cost more initially, but last much longer between repairs. The MTBF of a better pump may be one to four years longer than that of its non-upgraded counterpart. Consider that published average values of avoided pump failures range from $2600 to $12,000. This does not include lost opportunity costs. One pump fire occurs per 1000 failures. Having fewer pump failures means having fewer destructive pump fires.

As has been noted, a typical pump failure based on actual year 2002 reports, costs $5,000 on average. This includes costs for material, parts, labor and overhead. Let us now assume that the MTBF for a particular pump is 12 months and that it could be extended to 18 months. This would result in a cost avoidance of $2,500/yr—which is greater than the premium one would pay for the reliability-upgraded centrifugal pump.^[5][6][7]

Applications[link]

Metering pump for gasoline and additives.

Pumps are used throughout society for a variety of purposes. Early applications includes the use of the windmill or watermill to pump water. Today, the pump is used for irrigation, water supply, gasoline supply, air conditioning systems, refrigeration (usually called a compressor), chemical movement, sewage movement, flood control, marine services, etc.

Because of the wide variety of applications, pumps have a plethora of shapes and sizes: from very large to very small, from handling gas to handling liquid, from high pressure to low pressure, and from high volume to low volume.

Priming a pump[link]

Liquid and slurry pumps can lose prime and this will require the pump to be primed by adding liquid to the pump and inlet pipes to get the pump started. Loss of "prime" is usually due to ingestion of air into the pump. The clearances and displacement ratios in pumps used for liquids and other more viscous fluids cannot displace the air due to its lower density.

Pumps as public water supplies[link]

First European depiction of a piston pump, by Taccola, c.1450.^[8]

One sort of pump once common worldwide was a hand-powered water pump, or 'pitcher pump'. It would be installed over a community water well that was used by people in the days before piped water supplies.

In parts of the British Isles, it was often called "the parish pump". Although such community pumps are no longer common, the expression "parish pump" is still used. It derives from the kind of the chatter and conversation that might be heard as people congregated to draw water from the community water pump, and is now used to describe a place or forum where matter of purely local interest is discussed.^[9]

Because water from pitcher pumps is drawn directly from the soil, it is more prone to contamination. If such water is not filtered and purified, consumption of it might lead to gastrointestinal or other water-borne diseases. A notorious case is the 1854 Broad Street cholera outbreak. At the time it was not known how cholera was transmitted, but physician John Snow suspected contaminated water and had the handle of the public pump he suspected removed; the outbreak then subsided.

Modern hand-operated community pumps are considered the most sustainable low-cost option for safe water supply in resource-poor settings, often in rural areas in developing countries. A hand pump opens access to deeper groundwater that is often not polluted and also improves the safety of a well by protecting the water source from contaminated buckets. Pumps such as the Afridev pump are designed to be cheap to build and install, and easy to maintain with simple parts. However, scarcity of spare parts for these type of pumps in some regions of Africa has diminished their utility for these areas.^{[citation needed]}

Sealing multiphase pumping applications[link]

Multiphase pumping applications, also referred to as tri-phase, have grown due to increased oil drilling activity. In addition, the economics of multiphase production is attractive to upstream operations as it leads to simpler, smaller in-field installations, reduced equipment costs and improved production rates. In essence, the multiphase pump can accommodate all fluid stream properties with one piece of equipment, which has a smaller footprint. Often, two smaller multiphase pumps are installed in series rather than having just one massive pump.

For midstream and upstream operations, multiphase pumps can be located onshore or offshore and can be connected to single or multiple wellheads. Basically, multiphase pumps are used to transport the untreated flow stream produced from oil wells to downstream processes or gathering facilities. This means that the pump may handle a flow stream (well stream) from 100 percent gas to 100 percent liquid and every imaginable combination in between. The flow stream can also contain abrasives such as sand and dirt. Multiphase pumps are designed to operate under changing/fluctuating process conditions. Multiphase pumping also helps eliminate emissions of greenhouse gases as operators strive to minimize the flaring of gas and the venting of tanks where possible.^[10]

Types and features of multiphase pumps[link]

Helico-Axial Pumps (Centrifugal) A rotodynamic pump with one single shaft requiring two mechanical seals. This pump utilizes an open-type axial impeller. This pump type is often referred to as a "Poseidon Pump" and can be described as a cross between an axial compressor and a centrifugal pump.

'Twin Screw (Positive Displacement)' The twin screw pump is constructed of two intermeshing screws that force the movement of the pumped fluid. Twin screw pumps are often used when pumping conditions contain high gas volume fractions and fluctuating inlet conditions. Four mechanical seals are required to seal the two shafts.

Progressive Cavity Pumps (Positive Displacement) Progressive cavity pumps are single-screw types typically used in shallow wells or at the surface. This pump is mainly used on surface applications where the pumped fluid may contain a considerable amount of solids such as sand and dirt.

Electric Submersible Pumps (Centrifugal) These pumps are basically multistage centrifugal pumps and are widely used in oil well applications as a method for artificial lift. These pumps are usually specified when the pumped fluid is mainly liquid.

Buffer Tank A buffer tank is often installed upstream of the pump suction nozzle in case of a slug flow. The buffer tank breaks the energy of the liquid slug, smoothes any fluctuations in the incoming flow and acts as a sand trap.

As the name indicates, multiphase pumps and their mechanical seals can encounter a large variation in service conditions such as changing process fluid composition, temperature variations, high and low operating pressures and exposure to abrasive/erosive media. The challenge is selecting the appropriate mechanical seal arrangement and support system to ensure maximized seal life and its overall effectiveness.^[10][11][12]

Specifications[link]

Pumps are commonly rated by horsepower, flow rate, outlet pressure in metres (or feet) of head, inlet suction in suction feet (or metres) of head. The head can be simplified as the number of feet or metres the pump can raise or lower a column of water at atmospheric pressure.

From an initial design point of view, engineers often use a quantity termed the specific speed to identify the most suitable pump type for a particular combination of flow rate and head.

Pump material[link]

The pump material can be Stainless steel (SS 316 or SS 304), cast iron etc. It depends on the application of the pump. In the water industry and for pharma applications SS 316 is normally used, as stainless steel gives better results at high temperatures.

Pumping power[link]

The power imparted into a fluid will increase the energy of the fluid per unit volume. Thus the power relationship is between the conversion of the mechanical energy of the pump mechanism and the fluid elements within the pump. In general, this is governed by a series of simultaneous differential equations, known as the Navier-Stokes equations. However a more simple equation relating only the different energies in the fluid, known as Bernoulli's equation can be used. Hence the power, P, required by the pump:

Failed to parse (Missing texvc executable; please see math/README to configure.): P = \frac{\Delta P Q}{\eta}

where ΔP is the change in total pressure between the inlet and outlet (in Pa), and Q, the fluid flowrate is given in m^3/s. The total pressure may have gravitational, static pressure and kinetic energy components; i.e. energy is distributed between change in the fluid's gravitational potential energy (going up or down hill), change in velocity, or change in static pressure. η is the pump efficiency, and may be given by the manufacturer's information, such as in the form of a pump curve, and is typically derived from either fluid dynamics simulation (i.e. solutions to the Navier-stokes for the particular pump geometry), or by testing. The efficiency of the pump will depend upon the pump's configuration and operating conditions (such as rotational speed, fluid density and viscosity etc.)

Failed to parse (Missing texvc executable; please see math/README to configure.): \Delta P = {(v_2^2 - v_1^2) \over 2}+\Delta z g+{\Delta p_{\mathrm{static}}\over\rho}

For a typical "pumping" configuration, the work is imparted on the fluid, and is thus positive. For the fluid imparting the work on the pump (i.e. a turbine), the work is negative power required to drive the pump is determined by dividing the output power by the pump efficiency. Furthermore, this definition encompasses pumps with no moving parts, such as a siphon.

Pump efficiency[link]

Pump efficiency is defined as the ratio of the power imparted on the fluid by the pump in relation to the power supplied to drive the pump. Its value is not fixed for a given pump, efficiency is a function of the discharge and therefore also operating head. For centrifugal pumps, the efficiency tends to increase with flow rate up to a point midway through the operating range (peak efficiency) and then declines as flow rates rise further. Pump performance data such as this is usually supplied by the manufacturer before pump selection. Pump efficiencies tend to decline over time due to wear (e.g. increasing clearances as impellers reduce in size).

One important part of system design involves matching the pipeline head loss-flow characteristic with the appropriate pump or pumps in order to operate at or close to the point of maximum efficiency.

Pump efficiency is an important aspect and pumps should be regularly tested. Thermodynamic pump testing is one method.

Pump selection is done by performance curve which is curve between pressure head and flow rate, with power supply also taken care of. Pumps are normally available that run at 50 Hz or 60 Hz.

Pump testing[link]

To minimise energy use, and to ensure that pumps are correctly matched to the duty expected pumps, and pumping stations should be regularly tested.

In water supply application, which are usually fitted with centrifugal pumps, individual large pumps should be 70 - 80% efficient. They should be individually tested to ensure they are in the appropriate range, and replaced or prepared as appropriate.

Pumping stations should also be tested collectively, because where pumps can run in combination to meet a given demand, it is often possible for very inefficient combination of pumps to occur. For example. it is perfectly possible to have a large and a small pump operating in parallel, with the smaller pump not delivering any water, but merely consuming energy. See Pump station manager

Pumps are readily tested by fitting a flow meter, measuring the pressure difference between inlet and outlet, and measuring the power consumed.

Another method is thermodynamic pump testing where only the temperature rise and power consumed need be measured.

See also[link]

References[link]

Further reading[link]

• Australian Pump Manufacturers' Association. Australian Pump Technical Handbook, 3rd edition. Canberra: Australian Pump Manufacturers' Association, 1987. ISBN 0-7316-7043-4.
• Hicks, Tyler G. and Theodore W. Edwards. Pump Application Engineering. McGraw-Hill Book Company.1971. ISBN 07-028741-4
• Robbins, L. B. "Homemade Water Pressure Systems". Popular Science, February 1919, pages 83–84. Article about how a homeowner can easily build a pressurized home water system that does not use electricity.

External links[link]

Wikimedia Commons has media related to: Pumps

• www.pumpschool.com—Pump education devoted primarily to rotary positive displacement pumps
• Drinking Water System

Arnold Schwarzenegger
Schwarzenegger in January 2010.
38th Governor of California
In office November 17, 2003 – January 3, 2011
Lieutenant	Cruz Bustamante Mona Pasquil (acting) John Garamendi Abel Maldonado
Preceded by	Gray Davis
Succeeded by	Jerry Brown
Personal details
Born	Arnold Alois Schwarzenegger (1947-07-30) July 30, 1947 (age 64) Thal, Austria
Citizenship	Austria United States
Political party	Republican
Spouse(s)	Maria Shriver (1986–2011)
Relations	Gustav Schwarzenegger (father, deceased) Aurelia Jadrny (mother, deceased)
Children	Katherine (b. 1989) Christina (b. 1991) Patrick (b. 1993) Christopher (b. 1997) Joseph Baena (b. 1997)
Alma mater	Santa Monica College University of Wisconsin–Superior
Profession	Bodybuilder, actor, businessman, investor, politician
Religion	Roman Catholic
Signature
Website	Personal website
Military service
Service/branch	Austrian Armed Forces
Years of service	1965

Arnold Alois Schwarzenegger ( /ˈʃwɔrtsənɛɡər/; German: [ˈaɐnɔlt ˈalɔʏs ˈʃvaɐtsənˌʔɛɡɐ]; born July 30, 1947) is an Austrian and American former professional bodybuilder, actor, businessman, investor, and politician. Schwarzenegger served as the 38th Governor of California from 2003 until 2011.

Schwarzenegger began to weight train at the age of 15 years old. He was awarded the title of Mr. Universe at age 20 and went on to win the Mr. Olympia contest seven times. Schwarzenegger has remained a prominent presence in the sport of bodybuilding and he has written several books and numerous articles on the sport. Schwarzenegger gained worldwide fame as a Hollywood action film icon. He was nicknamed the "Austrian Oak" and the "Styrian Oak" in his bodybuilding days, "Arnie" during his acting career and more recently the "Governator" (from "Governor" and "Terminator").^[1]

As a Republican, he was first elected on October 7, 2003, in a special recall election to replace then-Governor Gray Davis. Schwarzenegger was sworn in on November 17, 2003, to serve the remainder of Davis's term. Schwarzenegger was then re-elected on November 7, 2006, in California's 2006 gubernatorial election, to serve a full term as governor, defeating Democrat Phil Angelides, who was California State Treasurer at the time. Schwarzenegger was sworn in for his second term on January 5, 2007.^[2]

Schwarzenegger was married to Maria Shriver. The couple separated in 2011 after 25 years of marriage.

Early life[link]

Schwarzenegger was born in Thal, Austria, a small village bordering the Styrian capital Graz, and was christened Arnold Alois Schwarzenegger.^[3] His parents were the local police chief, Gustav Schwarzenegger (1907–72), and Aurelia (née Jadrny; 1922–1998). His father served in World War II, after he voluntarily applied to join the Nazi Party in 1938.^[4] He served with the German Army as a Hauptfeldwebel of the Feldgendarmerie and was discharged in 1943 after contracting malaria. They were married on October 20, 1945 – Gustav was 38, and Aurelia was a 23-year-old widow with a son, Meinhard. According to Schwarzenegger, both of his parents were very strict: "Back then in Austria it was a very different world, if we did something bad or we disobeyed our parents, the rod was not spared."^[5] He grew up in a Roman Catholic family who attended Mass every Sunday.^[6][7]

Gustav had a preference for his stepson Meinhard, over his son, Arnold.^[8] His favoritism was "strong and blatant," which stemmed from unfounded suspicion that Arnold was not his child.^[9] Schwarzenegger has said his father had "no patience for listening or understanding your problems."^[6] Schwarzenegger had a good relationship with his mother and kept in touch with her until her death.^[10] In later life, Schwarzenegger commissioned the Simon Wiesenthal Center to research his father's wartime record, which came up with no evidence of atrocities despite Gustav's membership in the Nazi Party and SA.^[8] Schwarzenegger's father's background received wide press attention during the 2003 California recall campaign.^[11] At school, Schwarzenegger was apparently in the middle but stood out for his "cheerful, good-humored and exuberant" character.^[6] Money was a problem in their household; Schwarzenegger recalled that one of the highlights of his youth was when the family bought a refrigerator.^[9]

As a boy, Schwarzenegger played several sports, heavily influenced by his father.^[6] He picked up his first barbell in 1960, when his football (soccer) coach took his team to a local gym.^[3] At the age of 14, he chose bodybuilding over football as a career.^[12][13] Schwarzenegger has responded to a question asking if he was 13 when he started weightlifting: "I actually started weight training when I was 15, but I'd been participating in sports, like soccer, for years, so I felt that although I was slim, I was well-developed, at least enough so that I could start going to the gym and start Olympic lifting."^[5] However, his official website biography claims: "At 14, he started an intensive training program with Dan Farmer, studied psychology at 15 (to learn more about the power of mind over body) and at 17, officially started his competitive career."^[14] During a speech in 2001, he said, "My own plan formed when I was 14 years old. My father had wanted me to be a police officer like he was. My mother wanted me to go to trade school."^[15] Schwarzenegger took to visiting a gym in Graz, where he also frequented the local movie theaters to see bodybuilding idols such as Reg Park, Steve Reeves and Johnny Weissmuller on the big screen. "I was inspired by individuals like Reg Park and Steve Reeves."^[5] When Reeves died in 2000, Schwarzenegger fondly remembered him: "As a teenager, I grew up with Steve Reeves. His remarkable accomplishments allowed me a sense of what was possible, when others around me didn't always understand my dreams ... Steve Reeves has been part of everything I've ever been fortunate enough to achieve." In 1961, Schwarzenegger met former Mr. Austria Kurt Marnul, who invited him to train at the gym in Graz.^[3] He was so dedicated as a youngster that he broke into the local gym on weekends, when it was usually closed, so that he could train. "It would make me sick to miss a workout ... I knew I couldn't look at myself in the mirror the next morning if I didn't do it."^[5] When Schwarzenegger was asked about his first movie experience as a boy, he replied, "I was very young, but I remember my father taking me to the Austrian theaters and seeing some newsreels. The first real movie I saw, that I distinctly remember, was a John Wayne movie."^[5]

In 1971, his brother Meinhard died in a car accident.^[3] Meinhard had been drinking and was killed instantly. Schwarzenegger did not attend his funeral.^[9] Meinhard was due to marry Erika Knapp, and the couple had a three-year-old son, Patrick. Schwarzenegger would pay for Patrick's education and help him to immigrate to the United States.^[9] Gustav died the following year from a stroke.^[3] In Pumping Iron, Schwarzenegger claimed that he did not attend his father's funeral because he was training for a bodybuilding contest. Later, he and the film's producer said this story was taken from another bodybuilder for the purpose of showing the extremes that some would go to for their sport and to make Schwarzenegger's image more cold and machine-like in order to fan controversy for the film.^[16] Barbara Baker, his first serious girlfriend, has said he informed her of his father's death without emotion and that he never spoke of his brother.^[17] Over time, he has given at least three versions of why he was absent from his father's funeral.^[9]

In an interview with Fortune in 2004, Schwarzenegger told how he suffered what "would now be called child abuse" at the hands of his father:^[4][18]

My hair was pulled. I was hit with belts. So was the kid next door. It was just the way it was. Many of the children I've seen were broken by their parents, which was the German-Austrian mentality. They didn't want to create an individual. It was all about conforming. I was one who did not conform, and whose will could not be broken. Therefore, I became a rebel. Every time I got hit, and every time someone said, 'you can't do this,' I said, 'this is not going to be for much longer, because I'm going to move out of here. I want to be rich. I want to be somebody.'

Early adulthood[link]

Schwarzenegger served in the Austrian Army in 1965 to fulfill the one year of service required at the time of all 18-year-old Austrian males.^[3][14] During his army service, he won the Junior Mr. Europe contest.^[13] He went AWOL during basic training so he could take part in the competition and spent a week in military prison: "Participating in the competition meant so much to me that I didn't carefully think through the consequences." He won another bodybuilding contest in Graz, at Steirer Hof Hotel (where he had placed second). He was voted best built man of Europe, which made him famous.

"The Mr. Universe title was my ticket to America – the land of opportunity, where I could become a star and get rich."^[15] Schwarzenegger made his first plane trip in 1966, attending the NABBA Mr. Universe competition in London.^[14] He would come in second in the Mr. Universe competition, not having the muscle definition of American winner Chester Yorton.^[14]

Charles "Wag" Bennett, one of the judges at the 1966 competition, was impressed with Schwarzenegger and he offered to coach him. As Schwarzenegger had little money, Bennett invited him to stay in his crowded family home above one of his two gyms in Forest Gate, London, England. Yorton's leg definition had been judged superior, and Schwarzenegger, under a training program devised by Bennett, concentrated on improving the muscle definition and power in his legs. Staying in the East End of London helped Schwarzenegger improve his rudimentary grasp of the English language.^[19][20] Also in 1966, Schwarzenegger had the opportunity to meet childhood idol Reg Park, who became his friend and mentor.^[21] The training paid off and, in 1967, Schwarzenegger won the title for the first time, becoming the youngest ever Mr. Universe at the age of 20.^[14] He would go on to win the title a further three times.^[13] Schwarzenegger then flew back to Munich, training for four to six hours daily, attending business school and working in a health club (Rolf Putzinger's gym where he worked and trained from 1966–1968), returning in 1968 to London to win his next Mr. Universe title.^[14] He frequently told Roger C. Field, a friend in Munich at that time, "I'm going to become the greatest actor!"

Move to the U.S.[link]

Schwarzenegger with President Ronald Reagan in 1984.

Schwarzenegger, who dreamed of moving to the U.S. since the age of 10, and saw bodybuilding as the avenue through which to do so,^[22] realized his dream by moving to the United States in September 1968 at the age of 21, speaking little English.^[3][13] "Naturally, when I came to this country, my accent was very bad, and my accent was also very strong, which was an obstacle as I began to pursue acting."^[5] There he trained at Gold's Gym in Venice, Los Angeles, California, under Joe Weider. From 1970 to 1974, one of Schwarzenegger's weight training partners was Ric Drasin, a professional wrestler who designed the original Gold's Gym logo in 1973.^[23] Schwarzenegger also became good friends with professional wrestler "Superstar" Billy Graham. In 1970, at age 23, he captured his first Mr. Olympia title in New York, and would go on to win the title a total of seven times.^[14]

Immigration law firm Siskind & Susser have stated that Schwarzenegger may have been an illegal immigrant at some point in the late 1960s or early 1970s because of violations in the terms of his visa.^[24] LA Weekly would later say in 2002 that Schwarzenegger is the most famous immigrant in America, who "overcame a thick Austrian accent and transcended the unlikely background of bodybuilding to become the biggest movie star in the world in the 1990s".^[22]

In 1977, Schwarzenegger's autobiography/weight-training guide Arnold: The Education of a Bodybuilder was published and became a huge success.^[3] After taking English classes at Santa Monica College in California, he earned a BA by correspondence from the University of Wisconsin–Superior, where he graduated with a degree in international marketing of fitness and business administration in 1979.^[25]

Bodybuilding career[link]

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Competition record
Men’s Bodybuilding
Competitor for
Mr Universe (amateur)
1st	1967
Mr Universe (pro)
1st	1968
1st	1969
1st	1970
Mr. Olympia
2nd	1969
1st	1970
1st	1971
1st	1972
1st	1973
1st	1974
1st	1975
1st	1980
Powerlifting[27]
Competitor for
International Powerlifting Championships
1st	1966	+80 kg
German Powerlifting Championships
2nd	1967	+80 kg
1st	1968	+80 kg
Graz-Paradise Keller Powerlifting Championships
2nd	1967	+80 kg
Men's Weightlifting[28]
Competitor for
Styrian Junior Weightlifting Championships
1st	1964
German Austrian Weightlifting Championships
1st	1965

Schwarzenegger is considered among the most important figures in the history of bodybuilding, and his legacy is commemorated in the Arnold Classic annual bodybuilding competition. Schwarzenegger has remained a prominent face in the bodybuilding sport long after his retirement, in part because of his ownership of gyms and fitness magazines. He has presided over numerous contests and awards shows.

For many years, he wrote a monthly column for the bodybuilding magazines Muscle & Fitness and Flex. Shortly after being elected Governor, he was appointed executive editor of both magazines, in a largely symbolic capacity. The magazines agreed to donate $250,000 a year to the Governor's various physical fitness initiatives. The magazine MuscleMag International has a monthly two-page article on him, and refers to him as "The King".

One of the first competitions he won was the Junior Mr. Europe contest in 1965.^[3] He won Mr. Europe the following year, at age 19.^[3][14] He would go on to compete in, and win, many bodybuilding contests. His bodybulding victories included five Mr. Universe (4 – NABBA [England], 1 – IFBB [USA]) wins, and seven Mr. Olympia wins, a record which would stand until Lee Haney won his eighth consecutive Mr. Olympia title in 1991.

Schwarzenegger continues to work out even today. When asked about his personal training during the 2011 Arnold Classic he said that he was still working out a half an hour with weights every day.^[29]

• Competition Weight: 235 lb (107 kg) (top 250 lb (113 kg))

• Off Season Weight: 255 lb (116 kg) (top 260 lb (118 kg))

Powerlifting/Weightlifting[link]

During Arnold's early years in bodybuilding, he also competed in several Olympic weightlifting & Powerlifting contests. Arnold won 2 weightlifting contests in 1964 & 1965, as well as 2 powerlifting contests in 1966 & 1968.^[28]

In 1967, Schwarzenegger competed in and won the Munich stone-lifting contest, in which a stone weighing 508 German pounds (254 kg/560 lbs.) is lifted between the legs while standing on two foot rests.

Personal records[link]

• Clean & press – 264 lb (120 kg)^[28]
• Snatch – 243 lb (110 kg)^[28]
• Clean & jerk – 298 lb (135 kg)^[28]
• Squat – 215 kg (470 lb)^[28]
• Bench press – 200 kg (440 lb)^[28]
• Deadlift – 310 kg (680 lb)^[28]

Mr. Olympia[link]

Schwarzenegger presented awards at the USA Weightlifting Hall of Fame in 2011 in Columbus, Ohio. In photo: 1987 world champion American Karyn Marshall.

Schwarzenegger's goal was to become the greatest bodybuilder in the world, which meant becoming Mr. Olympia.^[3][14] His first attempt was in 1969, when he lost to three-time champion Sergio Oliva. However, Schwarzenegger came back in 1970 and won the competition, making him the youngest ever Mr. Olympia at the age of 23, a record he still holds to this day.^[14]

He continued his winning streak in the 1971–74 competitions.^[14] In 1975, Schwarzenegger was once again in top form, and won the title for the sixth consecutive time,^[14] beating Franco Columbu. After the 1975 Mr. Olympia contest, Schwarzenegger announced his retirement from professional bodybuilding.^[14]

Months before the 1975 Mr. Olympia contest, filmmakers George Butler and Robert Fiore persuaded Schwarzenegger to compete, in order to film his training in the bodybuilding documentary called Pumping Iron. Schwarzenegger had only three months to prepare for the competition, after losing significant weight to appear in the film Stay Hungry with Jeff Bridges. Lou Ferrigno proved not to be a threat, and a lighter-than-usual Schwarzenegger convincingly won the 1975 Mr. Olympia.

Schwarzenegger came out of retirement, however, to compete in the 1980 Mr. Olympia.^[3] Schwarzenegger was training for his role in Conan, and he got into such good shape because of the running, horseback riding and sword training, that he decided he wanted to win the Mr. Olympia contest one last time. He kept this plan a secret, in the event that a training accident would prevent his entry and cause him to lose face. Schwarzenegger had been hired to provide color commentary for network television, when he announced at the eleventh hour that while he was there: "Why not compete?" Schwarzenegger ended up winning the event with only seven weeks of preparation. After being declared Mr. Olympia for a seventh time, Schwarzenegger then officially retired from competition.

Steroid use[link]

Schwarzenegger has admitted to using performance-enhancing anabolic steroids while they were legal, writing in 1977 that "steroids were helpful to me in maintaining muscle size while on a strict diet in preparation for a contest. I did not use them for muscle growth, but rather for muscle maintenance when cutting up."^[30] He has called the drugs "tissue building."^[31]

In 1999, Schwarzenegger sued Dr. Willi Heepe, a German doctor who publicly predicted his early death on the basis of a link between his steroid use and his later heart problems. As the doctor had never examined him personally, Schwarzenegger collected a US$10,000 libel judgment against him in a German court.^[32] In 1999, Schwarzenegger also sued and settled with The Globe, a U.S. tabloid which had made similar predictions about the bodybuilder's future health.^[33]

Height[link]

His official height of 6'2" (1.88 m) has been brought into question by several articles. In his bodybuilding days in the late 1960s, he was measured to be 6'1.5" (1.87 m), a height confirmed by his fellow bodybuilders.^[34][35] However, in 1988 both the Daily Mail and Time Out magazine mentioned that Schwarzenegger appeared noticeably shorter.^[36] More recently, before running for Governor, Schwarzenegger's height was once again questioned in an article by the Chicago Reader.^[37] As Governor, Schwarzenegger engaged in a light-hearted exchange with Assemblyman Herb Wesson over their heights. At one point Wesson made an unsuccessful attempt to, in his own words, "[s]ettle this once and for all and find out how tall he is"^[38] by using a tailor's tape measure on the Governor. Schwarzenegger retaliated by placing a pillow stitched with the words "Need a lift?" on the five-foot-five inch (165 cm) Wesson's chair before a negotiating session in his office.^[39] Bob Mulholland also claimed Arnold was 5'10" (1.78 m) and that he wore risers in his boots.^[40] The debate on Schwarzenegger's height has spawned a website solely dedicated to the issue,^[41] and his page remains one of the most active on CelebHeights.com, a website which discusses the heights of celebrities.^[34]

Acting career[link]

Arnold Schwarzenegger
Other names	Arnold Strong Arnie
Occupation	Actor, director, producer
Years active	1969–2004, 2012–present (acting)

Schwarzenegger wanted to move from bodybuilding into acting, finally achieving it when he was chosen to play the role of Hercules in 1970's Hercules in New York. Credited under the name "Arnold Strong," his accent in the film was so thick that his lines were dubbed after production.^[13] His second film appearance was as a deaf mute hit-man for the mob in director Robert Altman's The Long Goodbye (1973), which was followed by a much more significant part in the film Stay Hungry (1976), for which he was awarded a Golden Globe for New Male Star of the Year. Schwarzenegger has discussed his early struggles in developing his acting career. "It was very difficult for me in the beginning – I was told by agents and casting people that my body was 'too weird', that I had a funny accent, and that my name was too long. You name it, and they told me I had to change it. Basically, everywhere I turned, I was told that I had no chance."^[5]

Schwarzenegger drew attention and boosted his profile in the bodybuilding film Pumping Iron (1977),^[12][13] elements of which were dramatized. In 1991, Schwarzenegger purchased the rights to the film, its outtakes, and associated still photography.^[42] Schwarzenegger auditioned for the title role of The Incredible Hulk, but did not win the role because of his height. Later, Lou Ferrigno got the part of Dr. David Banner's alter ego. Schwarzenegger appeared with Kirk Douglas and Ann-Margret in the 1979 comedy The Villain. In 1980 he starred in a biographical film of the 1950s actress Jayne Mansfield as Mansfield's husband, Mickey Hargitay.

Schwarzenegger's breakthrough film was the sword-and-sorcery epic Conan the Barbarian in 1982, which was a box-office hit.^[12] This was followed by a sequel, Conan the Destroyer in 1984, although it was not as successful as its predecessor.^[43] In 1983, Schwarzenegger starred in the promotional video "Carnival in Rio".

In 1984, he made the first of three appearances as the eponymous character and what some would say was the signature role in his acting career in director James Cameron's science fiction thriller film The Terminator.^[12][13][44] Following The Terminator, Schwarzenegger made Red Sonja in 1985.^[43]

During the 1980s, audiences had an appetite for action films, with both Schwarzenegger and Sylvester Stallone becoming international stars.^[13] Schwarzenegger's roles reflected his sense of humor, separating his roles from more serious action hero fare. His alternative-universe comedy/thriller Last Action Hero featured a poster of the movie Terminator 2: Judgment Day which, in the fictional alternate universe, had Sylvester Stallone as its star.

He made a number of successful films: Commando (1985), Raw Deal (1986), The Running Man (1987), and Red Heat (1988). In Predator (1987), another successful film, Schwarzenegger led a cast which included future Minnesota Governor Jesse Ventura (Ventura also appeared in The Running Man and Batman & Robin with Schwarzenegger) and future candidate for governor of Kentucky Sonny Landham.

Footprints and handprints of Arnold Schwarzenegger in front of the Grauman's Chinese Theatre

Twins (1988), a comedy with Danny DeVito also proved successful. Total Recall (1990) netted Schwarzenegger $10 million and 15% of the gross, and was a science fiction script directed by Paul Verhoeven, based on the Philip K. Dick short story, "We Can Remember It for You Wholesale". Kindergarten Cop (1990) reunited him with director Ivan Reitman, who directed him in Twins.

Schwarzenegger had a brief foray into directing, first with a 1990 episode of the TV series Tales from the Crypt, entitled "The Switch", and then with the 1992 telemovie Christmas in Connecticut. He has not directed since.

Schwarzenegger's commercial peak was his return as the title character in 1991's Terminator 2: Judgment Day, which was the highest-grossing film of 1991.^{[citation needed]} In 1993, the National Association of Theatre Owners named him the "International Star of the Decade."^[3] His next film project, the 1993 self-aware action comedy spoof Last Action Hero was released opposite Jurassic Park, and did not do well at the box office. His next film, the comedy drama True Lies (1994) was a popular spy film, and saw Schwarzenegger, reunited with James Cameron, appearing opposite Jamie Lee Curtis.

That same year the comedy Junior (1994) was released, the last of his three collaborations with Ivan Reitman and again co-starring Danny DeVito and also for the second time featuring Pamela Reed. This film brought Schwarzenegger his second Golden Globe nomination, this time for Best Actor – Musical or Comedy. It was followed by the action thriller Eraser (1996), the Christmas comedy Jingle All The Way (1996) with Arnold playing the main character, Howard Langston, and the comic book-based Batman & Robin (1997), where he played the villain Mr. Freeze. This was his final film before taking time to recuperate from a back injury. Following the critical failure of Batman & Robin, Schwarzenegger's film career and box office prominence went into decline.

He returned with the supernatural thriller End of Days (1999), later followed by the action films The 6th Day (2000) and Collateral Damage (2002) all of which failed to do well at the box office. In 2003, he made his third appearance as the title character in Terminator 3: Rise of the Machines, which went on to earn over $150 million domestically.^{[citation needed]}

In tribute to Schwarzenegger in 2002, Forum Stadtpark, a local cultural association, proposed plans to build a 25-meter (82 ft) tall Terminator statue in a park in central Graz. Schwarzenegger reportedly said he was flattered, but thought the money would be better spent on social projects and the Special Olympics.^[45]

His film appearances after becoming Governor of California include a 3-second cameo appearance in The Rundown (a.k.a., Welcome to the Jungle) with The Rock, and the 2004 remake of Around the World in 80 Days, where he appeared onscreen with action star Jackie Chan for the first time. In 2005 he appeared as himself in the film The Kid & I. Schwarzenegger voiced Baron von Steuben in Episode 24 ("Valley Forge") of Liberty's Kids.

Schwarzenegger had been rumored to be appearing in Terminator Salvation as the original T-800 model, alongside Roland Kickinger. Schwarzenegger denied his involvement,^[46] but it was later revealed that although he would appear briefly he would not be shooting new footage, and his image would be inserted into the movie from stock footage of the first Terminator movie.^[47][48] Schwarzenegger's most recent appearance was in Sylvester Stallone's The Expendables, where he made a cameo appearance alongside Stallone and Bruce Willis.^{[citation needed]}

Return to acting[link]

Arnold Schwarzenegger's star on the Hollywood Walk of Fame

In January 2011, just weeks after leaving office in California, Schwarzenegger announced that he was reading several new scripts for future films, one of them being the World War II action drama With Wings as Eagles, written by Randall Wallace, based on a true story.^[49][50]

On March 6, 2011, at the Arnold Seminar of the Arnold Classic, Schwarzenegger revealed that he was being courted for several films, including sequels to The Terminator and remakes of Predator and The Running Man, and that he was "packaging" a comic book character.^[51] The character was later revealed to be the Governator, star of the comic book and animated series of the same name. Schwarzenegger inspired the character and co-developed it with Stan Lee, who would have produced the series. Schwarzenegger would have voiced the Governator.^{[52][53][54][55]}

On May 20, 2011, Schwarzenegger's entertainment counsel announced that all movie projects currently in development were being halted. "Governor Schwarzenegger is focusing on personal matters and is not willing to commit to any production schedules or timelines."^[56] However, the Daily Star reported on May 29 that Schwarzenegger had been offered $40 million to star in two Terminator films.^[57]

On July 11, 2011, it was announced that Schwarzenegger is considering a comeback film despite his legal problems.^[58] He has reportedly signed to star in Last Stand as a dishonored Los Angeles cop.^[59] On September 6, 2011, it was announced that Schwarzenegger had signed on to The Expendables 2, in which he will play a larger cameo.^[60] He will later star in Unknown Soldier and The Tomb, thought to be released in 2013.^[61]

Political career[link]

Vice President Dick Cheney meets with Schwarzenegger for the first time at the White House.

Early politics[link]

Schwarzenegger has been a registered Republican for many years. As an actor, his political views were always well known as they contrasted with those of many other prominent Hollywood stars, who are generally considered to be a liberal and Democratic-leaning community. At the 2004 Republican National Convention, Schwarzenegger gave a speech and explained why he was a Republican:^[62]

I finally arrived here in 1968. What a special day it was. I remember I arrived here with empty pockets but full of dreams, full of determination, full of desire. The presidential campaign was in full swing. I remember watching the Nixon-Humphrey presidential race on TV. A friend of mine who spoke German and English translated for me. I heard Humphrey saying things that sounded like socialism, which I had just left. But then I heard Nixon speak. He was talking about free enterprise, getting the government off your back, lowering the taxes and strengthening the military. Listening to Nixon speak sounded more like a breath of fresh air. I said to my friend, I said, "What party is he?" My friend said, "He's a Republican." I said, "Then I am a Republican." And I have been a Republican ever since.

In 1985, Schwarzenegger appeared in Stop the Madness, an anti-drug music video sponsored by the Reagan administration. He first came to wide public notice as a Republican during the 1988 Presidential election, accompanying then-Vice President George H.W. Bush at a campaign rally.^[63]

Schwarzenegger's first political appointment was as chairman of the President's Council on Physical Fitness and Sports, on which he served from 1990 to 1993.^[3] He was nominated by George H. W. Bush, who dubbed him "Conan the Republican". He later served as Chairman for the California Governor's Council on Physical Fitness and Sports under Governor Pete Wilson. Yet, political analysts have identified Schwarzenegger as a liberal, as he has become more left-leaning since his election.^[64]

Between 1993 and 1994, Schwarzenegger was a Red Cross ambassador (a ceremonial role fulfilled by celebrities), recording several television/radio public service announcements to donate blood.

In an interview with Talk magazine in late 1999, Schwarzenegger was asked if he thought of running for office. He replied, "I think about it many times. The possibility is there, because I feel it inside."^[65] The Hollywood Reporter claimed shortly after that Schwarzenegger sought to end speculation that he might run for governor of California.^[65] Following his initial comments, Schwarzenegger said, "I'm in show business – I am in the middle of my career. Why would I go away from that and jump into something else?"^[65]

Governor of California[link]

Schwarzenegger announced his candidacy in the 2003 California recall election for Governor of California on the August 6, 2003 episode of The Tonight Show with Jay Leno.^[13] According to Schwarzenegger, he did not decide to run until the day of the announcement:

The recall happens and people are asking me, ‘What are you going to do?’ I thought about it but decided I wasn’t going to do it. I told Maria I wasn’t running. I told everyone I wasn’t running. I wasn’t running. I just thought [en route to the Tonight Show], This will freak everyone out. It’ll be so funny. I’ll announce that I am running. I told Leno I was running. And two months later I was governor. What the fuck is that? All these people are asking me, ‘What’s your plan? Who’s on your staff?’ I didn’t have a plan. I didn’t have a staff. I wasn’t running until I went on Jay Leno.^[66]

Schwarzenegger had the most name recognition in a crowded field of candidates, but he had never held public office and his political views were unknown to most Californians. His candidacy immediately became national and international news, with media outlets dubbing him the "Governator" (referring to The Terminator movies, see above) and "The Running Man" (the name of another one of his films), and calling the recall election "Total Recall" (yet another Schwarzenegger starrer). Schwarzenegger declined to participate in several debates with other recall replacement candidates, and appeared in only one debate on September 24, 2003.^[67]

President George W. Bush meets with Schwarzenegger after his successful election to the California Governorship

On October 7, 2003, the recall election resulted in Governor Gray Davis being removed from office with 55.4% of the Yes vote in favor of a recall. Schwarzenegger was elected Governor of California under the second question on the ballot with 48.6% of the vote to choose a successor to Davis. Schwarzenegger defeated Democrat Cruz Bustamante, fellow Republican Tom McClintock, and others. His nearest rival, Bustamante, received 31% of the vote. In total, Schwarzenegger won the election by about 1.3 million votes. Under the regulations of the California Constitution, no runoff election was required. Schwarzenegger was the first foreign-born governor of California since Irish-born Governor John G. Downey in 1862.

As soon as Schwarzenegger was elected governor, Willie Brown said he would start a drive to recall the governor. Schwarzenegger was equally entrenched in what he considered to be his mandate in cleaning up gridlock. Building on a catchphrase from the sketch "Hans and Franz" from Saturday Night Live (which partly parodied his bodybuilding career), Schwarzenegger called the Democratic State politicians "girlie men".^[68]

Schwarzenegger's early victories included repealing an unpopular increase in the vehicle registration fee as well as preventing driver's licenses being given out to illegal immigrants, but later he began to feel the backlash when powerful state unions began to oppose his various initiatives. Key among his reckoning with political realities was a special election he called in November 2005, in which four ballot measures he sponsored were defeated. Schwarzenegger accepted personal responsibility for the defeats and vowed to continue to seek consensus for the people of California. He would later comment that "no one could win if the opposition raised 160 million dollars to defeat you".

Schwarzenegger then went against the advice of fellow Republican strategists and appointed a Democrat, Susan Kennedy, as his Chief of Staff. Schwarzenegger gradually moved towards a more politically moderate position, determined to build a winning legacy with only a short time to go until the next gubernatorial election.

Schwarzenegger ran for re-election against Democrat Phil Angelides, the California State Treasurer, in the 2006 elections, held on November 7, 2006. Despite a poor year nationally for the Republican party, Schwarzenegger won re-election with 56.0% of the vote compared with 38.9% for Angelides, a margin of well over one million votes.^[69] In recent years, many commentators have seen Schwarzenegger as moving away from the right and towards the center of the political spectrum. After hearing a speech by Schwarzenegger at the 2006 Martin Luther King, Jr. breakfast, San Francisco mayor Gavin Newsom said that, "[H]e's becoming a Democrat [... H]e's running back, not even to the center. I would say center-left".

It was rumored that Schwarzenegger might run for the United States Senate in 2010, as his governorship would be term-limited by that time. This turned out to be false.^[70][71]

With Schwarzenegger and Senator Dianne Feinstein behind him, President George W. Bush comments on wildfires and firefighting efforts in California, October 2007

Wendy Leigh, who wrote an unofficial biography on Schwarzenegger, claims he plotted his political rise from an early age using the movie business and bodybuilding as building blocks to escape a depressing home.^[8] Leigh portrays Schwarzenegger as obsessed with power and quotes him as saying, "I wanted to be part of the small percentage of people who were leaders, not the large mass of followers. I think it is because I saw leaders use 100% of their potential –I was always fascinated by people in control of other people."^[8] Schwarzenegger has said that it was never his intention to enter politics, but he says, "I married into a political family. You get together with them and you hear about policy, about reaching out to help people. I was exposed to the idea of being a public servant and Eunice and Sargent Shriver became my heroes."^[22] Eunice Kennedy Shriver was sister of John F. Kennedy, and mother-in-law to Schwarzenegger; Sargent Shriver is husband to Eunice and father-in-law to Schwarzenegger. He cannot run for president as he is not a natural born citizen of the United States. In The Simpsons Movie (2007), he is portrayed as the President, and in the Sylvester Stallone movie, Demolition Man (1993, ten years before his first run for political office), it is revealed that a constitutional amendment passed which allowed Schwarzenegger to run for President.^{[citation needed]}

Schwarzenegger is a dual Austria/United States citizen.^[72] He holds Austrian citizenship by birth and has held U.S. citizenship since becoming naturalized in 1983. Being Austrian and thus European, he was able to win the 2007 European Voice campaigner of the year award for taking action against climate change with the California Global Warming Solutions Act of 2006 and plans to introduce an emissions trading scheme with other US states and possibly with the EU.^[73]

Schwarzenegger during his visit to Naval Medical Center in San Diego, July 2010

Because of his personal wealth from his acting career, Schwarzenegger did not accept his governor's salary of $175,000 per year.^[74]

Schwarzenegger's endorsement in the Republican primary of the 2008 U.S. Presidential election was highly sought; despite being good friends with candidates Rudy Giuliani and Senator John McCain, Schwarzenegger remained neutral throughout 2007 and early 2008. Giuliani dropped out of the Presidential race on January 30, 2008, largely because of a poor showing in Florida, and endorsed McCain. Later that night, Schwarzenegger was in the audience at a Republican debate at the Ronald Reagan Presidential Library in California. The following day, he endorsed McCain, joking, "It's Rudy's fault!" (in reference to his friendships with both candidates and that he could not make up his mind). Schwarzenegger's endorsement was thought to be a boost for Senator McCain's campaign; both spoke about their concerns for the environment and economy.^[75]

In its April 2010 report, Progressive ethics watchdog group Citizens for Responsibility and Ethics in Washington named Schwarzenegger one of 11 "worst governors" in the United States because of various ethics issues throughout Schwarzenegger's term as governor.^[76][77]

Governor Schwarzenegger played a significant role in opposing Proposition 66, a proposed amendment of the Californian Three Strikes Law, in November 2004. This amendment would have required the third felony to be either violent or serious to mandate a 25-years-to-life sentence. In the last week before the ballot, Schwarzenegger launched an intensive campaign^[78] against Proposition 66.^[79] He stated that "it would release 26,000 dangerous criminals and rapists".

Schwarzenegger did not run for re-election in 2010.

Allegations of sexual misconduct[link]

Code Pink protesting against Schwarzenegger

During his initial campaign for governor, allegations of sexual and personal misconduct were raised against Schwarzenegger, dubbed "Gropegate".^[80] Within the last five days before the election, news reports appeared in the Los Angeles Times recounting allegations of sexual misconduct from several individual women, six of whom eventually came forward with their personal stories.^[81]

Three of the women claimed he had grabbed their breasts, a fourth said he placed his hand under her skirt on her buttock. A fifth woman claimed Schwarzenegger tried to take off her bathing suit in a hotel elevator, and the last said he pulled her onto his lap and asked her about a sex act.^[80]

Schwarzenegger admitted that he has "behaved badly sometimes" and apologized, but also stated that "a lot of [what] you see in the stories is not true". This came after an interview in adult magazine Oui from 1977 surfaced, in which Schwarzenegger discussed attending sexual orgies and using substances such as marijuana.^[82] Schwarzenegger is shown smoking a marijuana joint after winning Mr. Olympia in the 1975 documentary film Pumping Iron. In an interview with GQ magazine in October 2007, Schwarzenegger said, "[Marijuana] is not a drug. It's a leaf. My drug was pumping iron, trust me."^[83] His spokesperson later said the comment was meant to be a joke.^[83]

British television personality Anna Richardson settled a libel lawsuit in August 2006 against Schwarzenegger, his top aide, Sean Walsh, and his publicist, Sheryl Main.^[84] A joint statement read: "The parties are content to put this matter behind them and are pleased that this legal dispute has now been settled."^[84] Richardson claimed they tried to tarnish her reputation by dismissing her allegations that Schwarzenegger touched her breast during a press event for The 6th Day in London.^[85] She claimed Walsh and Main libeled her in a Los Angeles Times article when they contended she encouraged his behavior.^[84]

Citizenship[link]

In 2005, Peter Pilz, from the Austrian Green Party, demanded that parliament revoke Schwarzenegger's Austrian citizenship. This demand was based on Article 33 of the Austrian Citizenship Act that states: A citizen, who is in the public service of a foreign country, shall be deprived of his citizenship, if he heavily damages the reputation or the interests of the Austrian Republic.^[72] Pilz claimed that Schwarzenegger's actions in support of the death penalty (prohibited in Austria under Protocol 13 of the European Convention on Human Rights) had indeed done damage to Austria's reputation. Schwarzenegger explained his actions by referring to the fact that his only duty as Governor of California was to prevent an error in the judicial system.

Environmental record[link]

On September 27, 2006 Schwarzenegger signed a bill creating the nation's first cap on greenhouse gas emissions. The law set new regulations on the amount of emissions utilities, refineries and manufacturing plants are allowed to release into the atmosphere. Schwarzenegger also signed a second global warming bill that prohibits large utilities and corporations in California from making long-term contracts with suppliers who do not meet the state's greenhouse gas emission standards. The two bills are part of a plan to reduce California's emissions by 25 percent to 1990s levels by 2020. In 2005, Schwarzenegger issued an executive order calling to reduce greenhouse gases to 80 percent below 1990 levels by 2050.^[86]

Schwarzenegger signed another executive order on October 17, 2006 allowing California to work with the Northeast's Regional Greenhouse Gas Initiative. They plan to reduce carbon dioxide emissions by issuing a limited amount of carbon credits to each power plant in participating states. Any power plants that exceed emissions for the amount of carbon credits will have to purchase more credits to cover the difference. The plan is set to be in effect in 2009.^[87] In addition to using his political power to fight global warming, the governor has taken steps at his home to reduce his personal carbon footprint. Schwarzenegger has adapted one of his Hummers to run on hydrogen and another to run on biofuels. He has also installed solar panels to heat his home.^[88]

In respect of his contribution to the direction of the US motor industry, Schwarzenegger was invited to open the 2009 SAE World Congress in Detroit, on April 20, 2009.^[89]

In 2011, Arnold Schwarzenegger founded the R20 Regions of Climate Action to develop a sustainable, low carbon economy.^[90]

Electoral history[link]

Business career[link]

Schwarzenegger has also had a highly successful business career.^[8][22] Following his move to the United States, Schwarzenegger became a "prolific goal setter" and would write his objectives at the start of the year on index cards, like starting a mail order business or buying a new car – and succeed in doing so.^[17] By the age of 30, Schwarzenegger was a millionaire, well before his career in Hollywood. His financial independence came from his success as a budding entrepreneur with a series of successful business ventures and investments.

Bricklaying business[link]

In 1968, Schwarzenegger and fellow bodybuilder Franco Columbu started a bricklaying business. The business flourished thanks to the pair's marketing savvy and an increased demand following the 1971 San Fernando earthquake.^[91][92][66] Schwarzenegger and Columbu used profits from their bricklaying venture to start a mail order business, selling bodybuilding and fitness-related equipment and instructional tapes.^[3][91]

Real estate investing[link]

Schwarzenegger rolled profits from the mail order business and his bodybuilding competition winnings into his first real estate investment venture: an apartment building he purchased for $10,000. He would later go on to invest in a number of real estate holding companies.^[93][94]

Restaurant[link]

In 1992, Schwarzenegger and his wife opened a restaurant in Santa Monica called Schatzi On Main. Schatzi literally means "little treasure," colloquial for "honey" or "darling" in German. In 1998, he sold his restaurant.^[95]

Planet Hollywood investment[link]

Schwarzenegger was a founding celebrity investor in the Planet Hollywood chain of international theme restaurants (modeled after the Hard Rock Cafe) along with Bruce Willis, Sylvester Stallone and Demi Moore. Schwarzenegger severed his financial ties with the business in early 2000.^[96][97] Schwarzenegger said the company had not had the success he had hoped for, claiming he wanted to focus his attention on "new US global business ventures" and his movie career.^[96]

Other ventures and investments[link]

He also invested in a shopping mall in Columbus, Ohio. He has talked about some of those who have helped him over the years in business: "I couldn't have learned about business without a parade of teachers guiding me... from Milton Friedman to Donald Trump... and now, Les Wexner and Warren Buffett. I even learned a thing or two from Planet Hollywood, such as when to get out! And I did!"^[15] He has significant ownership in Dimensional Fund Advisors, an investment firm.^[98]

Personal life[link]

Early love life[link]

In 1969, Schwarzenegger met Barbara Outland (later Barbara Outland Baker), an English teacher he lived with until 1974.^[99] Schwarzenegger talked about Barbara in his memoir in 1977: "Basically it came down to this: she was a well-balanced woman who wanted an ordinary, solid life, and I was not a well-balanced man, and hated the very idea of ordinary life."^[99] Baker has described Schwarzenegger as "[a] joyful personality, totally charismatic, adventurous, and athletic" but claims towards the end of the relationship he became "insufferable – classically conceited – the world revolved around him".^[100] Baker published her memoir in 2006, entitled Arnold and Me: In the Shadow of the Austrian Oak.^[101] Although Baker, at times, painted an unflattering portrait of her former lover, Schwarzenegger actually contributed to the tell-all book with a foreword, and also met with Baker for three hours.^[101] Baker claims, for example, that she only learned of his being unfaithful after they split, and talks of a turbulent and passionate love life.^[101] Schwarzenegger has made it clear that their respective recollection of events can differ.^[101] The couple first met six to eight months after his arrival in the U.S—their first date was watching the first Apollo Moon landing on television.^[17] They shared an apartment in Santa Monica for three and a half years, and having little money, would visit the beach all day, or have barbecues in the back yard.^[17] Although Baker claims that when she first met him, he had "little understanding of polite society" and she found him a turn-off, she says, "He's as much a self-made man as it's possible to be—he never got encouragement from his parents, his family, his brother. He just had this huge determination to prove himself, and that was very attractive ... I'll go to my grave knowing Arnold loved me."^[17]

Schwarzenegger met his next paramour, Sue Moray, a Beverly Hills hairdresser's assistant, on Venice Beach in July 1977. According to Moray, the couple led an open relationship: "We were faithful when we were both in LA ... but when he was out of town, we were free to do whatever we wanted."^[9] Schwarzenegger met Maria Shriver at the Robert F. Kennedy Tennis Tournament in August 1977, and went on to have a relationship with both women until August 1978, when Moray (who knew of his relationship with Shriver) issued an ultimatum.^[9]

Marriage and family[link]

Schwarzenegger with his wife Maria Shriver at the 2007 Special Olympics in Shanghai, China

On April 26, 1986, Schwarzenegger married television journalist Maria Shriver, niece of President John F. Kennedy, in Hyannis, Massachusetts. The Rev. John Baptist Riordan performed the ceremony at St. Francis Xavier Catholic Church.^[102] They have four children: Katherine Eunice Shriver Schwarzenegger (born December 13, 1989 in Los Angeles); Christina Maria Aurelia Schwarzenegger (born July 23, 1991 in Los Angeles);^[103] Patrick Schwarzenegger (born September 18, 1993 in Los Angeles);^[104] and Christopher Sargent Shriver Schwarzenegger (born September 27, 1997 in Los Angeles).^[105] Schwarzenegger lives in a 11,000-square-foot (1,000 m²) home in Brentwood.^[106][107] The divorcing couple currently own vacation homes in Sun Valley, Idaho and Hyannis Port, Massachusetts.^[108] They attended St. Monica's Catholic Church.^[109]