Military airbase

An military airbase (sometimes referred to as a military airfield, military airport, air force station, air force base or short airbase) is an aerodrome used by a military force for the operation of military aircraft.

Airbase facilities

An airbase typically has some facilities similar to a civilian airport—for example air traffic control and firefighting. Some military aerodromes have passenger facilities; for example RAF Brize Norton in England has a terminal used by passengers for the Royal Air Force's flights by TriStar to the Falkland Islands. A number of military airbases also have a civil enclave for commercial passenger flights, e.g. Beijing Nanyuan Airport (China), Ibaraki Airport (Japan), Burlington International Airport (USA).

Some airbases have revetments, hardened aircraft shelters, or even underground hangars, to protect aircraft from enemy attack. Combat aircraft require storage of aircraft ordnance. An airbase may be defended by anti-aircraft weapons and force protection troops.

Force play

In baseball, a force is a situation when a baserunner is compelled (or forced) to vacate his time-of-pitch base—and thus try to advance to the next base—because the batter became a runner. A runner at first base is always forced to attempt to advance to second base when the batter becomes a runner. Runners at second or third base are forced only when all bases preceding their time-of-pitch base are occupied by other baserunners and the batter becomes a runner.

A forced runner's force base is the next base beyond his time-of-pitch base. Any attempt by fielders to put a forced runner out is called a force play. Think of forced runners as bumper cars. If with a runner on first, the batter hits a ground ball, the batter must run to first, and since two runners are not allowed to stay on one base at one time, the runner who was on first to begin with is now bumper-carred by the advancing batter over to second. If there already was a runner on second as well, that runner is now bumper-carred over to third, and so on. If a runner is bumper-carred over to the next base by the advancing batter or by another runner who was bumper-carred by the advancing batter, then that runner is considered to have been forced to advance to the next base. If, however, with a runner on third, for example, the batter hits a ground ball, the batter must run to first, but the runner on third, not having been bumper-carred by the batter, is not forced to advance and can stay where he is if he elects to.

Eielson Air Force Base

Eielson Air Force Base (AFB) (IATA: EIL, ICAO: PAEI, FAA LID: EIL) is a United States Air Force base located approximately 26 miles (42 km) southeast of Fairbanks, Alaska and just southeast of Moose Creek, Alaska. It was established in 1943 as Mile 26 Satellite Field and taken off deployment in 2007. It has been a Superfund site since 1989.

Its host unit is the 354th Fighter Wing (354 FW) assigned to the Eleventh Air Force of the Pacific Air Forces. The 354 FW's primary mission is to support Red Flag – Alaska, a series of Pacific Air Forces commander–directed field training exercises for U.S. Forces, joint offensive counter-air, interdiction, close-air support, and large force employment training in a simulated combat environment.

Eielson AFB was named in honor of polar pilot Carl Ben Eielson. The 354 FW has been commanded by Brigadier General Mark D. Kelly.

Overview

Until 2007, Eielson was a front line base, deploying fighter and bomber units around the world and providing for the defense of Alaska. Because of BRAC 2005 the base went off deployment status in 2007. Its primary mission is to support Red Flag-Alaska, a series of Pacific Air Forces commander-directed field training exercises for U.S. Forces, joint offensive counter-air, interdiction, close-air support, and large force employment training in a simulated combat environment. These exercises are conducted on the Joint Pacific Alaskan Range complex with air operations flown out of the two bases. Alaska's size enables the military to have the largest air-ground training complex in America.

Air force

An air force, also known in some countries as an air army, is in the broadest sense, the national military organization that primarily conducts aerial warfare. More specifically, it is the branch of a nation's armed services that is responsible for aerial warfare as distinct from an army, navy, or a marine corps. Typically, air forces are responsible for gaining control of the air, carrying out strategic and tactical bombing missions, and providing support to land and naval forces.

The term "air force" may also refer to a tactical air force or numbered air force, which is an operational formation either within a national air force or comprising several air components from allied nations. Air forces typically consist of a combination of fighters, bombers, helicopters, transport planes and other aircraft.

Many air forces are also responsible for operations of the military space, intercontinental ballistic missiles (ICBM), and communications equipment. Some air forces may command and control other air defence assets such as anti-aircraft artillery, surface-to-air missiles, or anti-ballistic missile warning networks and defensive systems. Some nations, principally Russia, the former Soviet Union and countries who modelled their militaries along Soviet lines, have an air defence force which is organizationally separate from their air force.

Force

In physics, a force is any interaction that, when unopposed, will change the motion of an object. In other words, a force can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate. Force can also be described by intuitive concepts such as a push or a pull. A force has both magnitude and direction, making it a vector quantity. It is measured in the SI unit of newtons and represented by the symbol F.

The original form of Newton's second law states that the net force acting upon an object is equal to the rate at which its momentum changes with time. If the mass of the object is constant, this law implies that the acceleration of an object is directly proportional to the net force acting on the object, is in the direction of the net force, and is inversely proportional to the mass of the object

Related concepts to force include: thrust, which increases the velocity of an object; drag, which decreases the velocity of an object; and torque, which produces changes in rotational speed of an object. In an extended body, each part usually applies forces on the adjacent parts; the distribution of such forces through the body is the so-called mechanical stress. Pressure is a simple type of stress. Stress usually causes deformation of solid materials, or flow in fluids.