- published: 26 Jun 2014
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Supersonic speed is a rate of travel of an object that exceeds the speed of sound (Mach 1). For objects traveling in dry air of a temperature of 20 °C (68 °F) at sea level, this speed is approximately 343.2 m/s, 1,125 ft/s, 768 mph, 667 knots, or 1,235 km/h. Speeds greater than five times the speed of sound (Mach 5) are often referred to as hypersonic. Flights during which only some parts of the air surrounding an object, such as the ends of rotor blades, reach supersonic speeds are called transonic. This occurs typically somewhere between Mach 0.8 and Mach 1.23.
Sounds are traveling vibrations in the form of pressure waves in an elastic medium. In gases, sound travels longitudinally at different speeds, mostly depending on the molecular mass and temperature of the gas, and pressure has little effect. Since air temperature and composition varies significantly with altitude, Mach numbers for aircraft may change despite a constant travel speed. In water at room temperature supersonic speed can be considered as any speed greater than 1,440 m/s (4,724 ft/s). In solids, sound waves can be polarized longitudinally or transversely and have even higher velocities.
NASA's flying saucer, aka the Low-Density Supersonic Decelerator, paves the way for landing heavy sp
LDSD: We Brake for Mars (Part 1)
NASA EDGE: Testing NASA's Low Density Supersonic Decelerator
Real Martians Moment: Low Density Supersonic Decelerator
NASA Low Density Supersonic Decelerator (LDSD)
Low-Density Supersonic Decelerator Test
Low-Density Supersonic Decelerator (LDSD) Media Reel 2
NASA's 'Flying Saucer' Low-Density Supersonic Decelerator Takes Flight from Hawaii
NASA conducts spin test on15-foot-wide saucer-shaped Low-Density Supersonic Decelerator (LDSD)
NASA Low Density Supersonic Decelerator (LDSD) Test Flight #2
NASA was forced to cancel six attempted launches of a saucer-shaped Mars landing test vehicle in early June because of unusually strong winds at the Hawaiian test site. NASA has developed the Low-Density Supersonic Decelerator, a 3,048 kg flight vehicle, with a view to overcoming the obstacles of a Martian landing.The vehicle is launched by a helium balloon, which will ascend to 36,600 metres. "We cannot have very high winds near the ground so that the balloon is able to be launched and not be damaged by the winds," said Mark Adler, project manager of NASA's Jet Propulsion Laboratory, in an interview with Space.com. "We also have to have conditions where the higher level winds take the balloon away from populated areas." After reaching altitude, the balloon is detached from the craft, ...
Technology Drives Exploration. NASA EDGE visits NASA Jet Propulsion Laboratory to check in with the Low-Density Supersonic Decelerator Team. Find out how NASA's Space Technology Mission Directorate is helping to pave the way for entry descent and landing of humans on Mars.
NASA’s Ian Clark is the Principal Investigator for the Low Density Supersonic Decelerator (LDSD) Project; it’s basically an inflatable airbrake designed to help spacecraft descending through a planet’s atmosphere to slow from breakneck speeds to a safe landing speed. The technology behind LDSD will allow NASA to safely land spacecraft with larger payloads on the surface of Mars, more accurately and at elevations we’ve never before had access to.
NASA's LDSD test is designed to investigate breakthrough technologies that will benefit landing future robotic and human Mars missions, as well as aid in safely returning large payloads to Earth. The LDSD test over the Pacific Ocean simulates the supersonic entry and descent speeds a spacecraft would be exposed to when flying through the Martian atmosphere.
NASA recently performed a trial run on a rocket sled test fixture, powered by rockets, to replicate the forces a supersonic spacecraft would experience prior to landing. The sled tests will allow the Low-Density Supersonic Decelerator Project, or LDSD, to test inflatable and parachute decelerators to slow spacecraft prior to landing and allow NASA to increase landed payload masses, improve landing accuracy and increase the altitude of safe landing-sites. (NASA)
B-roll for media. NASA's Low-Density Supersonic Decelerator (LDSD) project will be flying a rocket-powered, saucer-shaped test vehicle into near-space from the Navy's Pacific Missile Range Facility on Kauai, Hawaii, in June. The LDSD crosscutting demonstration mission will test breakthrough technologies that will enable large payloads to be safely landed on the surface of Mars, or other planetary bodies with atmospheres, including Earth. The technologies will not only enable landing of larger payloads on Mars, but also allow access to much more of the planet's surface by enabling landings at higher-altitude sites.
NASA's Low-Density Supersonic Decelerator (LDSD) was successfully launched on a helium balloon today at the U.S. Navy's Pacific Missile Range Facility in Kauai, Hawaii later the LDSD will be released at 120,000 feet and fire a Star 48B rocket motor to boost it to Mach 4.0 and 180,000 feet. This height and speed simulates a spacecraft flying through the Martian atmosphere and is where the air breaking systems will be tested on the LDSD vehicle. LDSD is fitted with what is called SIAD-R, a giant dounaut air bag that will increase the diameter of the vehicle and help slow it down to Mach 2.5 where a supersonic parachute will deploy ahead of a safe landing in the Pacific Ocean for recovery.
NASA's Low-Density Supersonic Decelerator (LDSD) project will be flying a rocket-powered, saucer-shaped test vehicle into near-space from the Navy's Pacific Missile Range Facility this June from Kauai, Hawaii. To prepare for the flight, a "spin" test was conducted from the gallery above a clean room at NASA's Jet Propulsion Laboratory in Pasadena, California, where this near-space experimental test vehicle is being prepared for shipment to Hawaii. During the broadcast, the 15-foot-wide, 7,000-pound vehicle underwent a "spin-table" test. The LDSD crosscutting demonstration mission will test breakthrough technologies that will enable large payloads to be safely landed on the surface of Mars, or other planetary bodies with atmospheres, including Earth.
Ian Clark, principal investigator of the Low-Density Supersonic Decelerator, takes us through a play-by-play of NASA’s recent 'flying saucer' Test in Hawaii, using high-definition video shot from cameras on board the test vehicle.
Ian Clark, principal investigator of the Low-Density Supersonic Decelerator, takes us through a play-by-play of NASA’s recent 'flying saucer' Test in Hawaii, using high-definition video shot from cameras on board the test vehicle.
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Supersonic decelerator SIAD This tops our list of best in Sci-Tech 2015!!
NASA’s Ian Clark is the Principal Investigator for the Low Density Supersonic Decelerator (LDSD) Project; it’s basically an inflatable airbrake designed to help spacecraft descending through a planet’s atmosphere to slow from breakneck speeds to a safe landing speed. The technology behind LDSD will allow NASA to safely land spacecraft with larger payloads on the surface of Mars, more accurately and at elevations we’ve never before had access to. Credit: NASA
Second flight test of saucer-shaped vehicle. On June 8, NASA's Low Density Supersonic Decelerator (LDSD) completed its second flight test in Hawaii. After being carried to an altitude of about 120,000 feet by a balloon and then boosted to the edge of space by a rocket engine, the LDSD vehicle tested new developmental entry and descent technologies on its supersonic return to Earth. These technologies could help future spacecraft safely land larger payloads on the surface of Mars, and allow access to more of the planet's surface by enabling landings at higher-altitude sites. Courtesy NASA. More space videos at http://www.youtube.com/user/okrajoe Please visit our channel to subscribe. .
The Low-Density Supersonic Decelerator or LDSD is a reentry vehicle designed to test techniques for atmospheric entry on Mars. The disc-shaped LDSD uses an inflatable structure called the Supersonic Inflatable Aerodynamic Decelerator (SIAD), which is essentially an donut-shaped balloon, to create atmospheric drag in order to decelerate the vehicle before deploying a large supersonic parachute.[2] The goal of the project is to develop a reentry system capable of landing 2- to 3-ton payloads on Mars, as opposed to the 1-ton limit of the currently used systems.
A NASA scientific balloon carried aloft the Low Density Supersonic Decelerator (LDSD) test vehicle on June 8, 2015, from the U.S. Navy’s Pacific Missile Range Facility (PMRF) on Hawaiian island of Kauai. NASA's Wallops Flight Facility in Virginia coordinated range and safety support with the PMRF and provided the balloon systems used to launch the LDSD test vehicle. The balloon was launched at 7:45 a.m. HST by a team from the Columbia Scientific Balloon Facility, managed by Wallops and operated by Orbital ATK. As planned, at 11:35 a.m. HST, the vehicle separated from the balloon at about 120,000 feet above the ocean. At the end of the video this can be seen from the ground at PMRF.
El proyecto de Desacelerador Supersónico de Baja Densidad (LDSD), un sistema de aterrizaje en otros planetas, será lanzado desde Hawaii. Podeis seguirlo aqui http://www.ustream.tv/nasajpl2 La NASA ha programado para esta misma tarde a las 19:30 GMT la esperada prueba de vuelo de su platillo volante, un nuevo sistema ideado para aterrizar naves pesadas con mayor seguridad. Por supuesto, la idea de fondo es la de hacerlos descender sobre Marte. El proyecto del Desacelerador Supersónico de Baja Densidad (LDSD por sus siglas en inglés) consiste en un vehículo de prueba en forma de platillo y propulsado por cohetes, que será lanzado desde la base de misiles de la Marina de Estados Unidos en Kauai, Hawaii. La prueba, prevista para ayer martes, se ha visto obligada a retrasarse 24 horas debido...
The second flight test of NASA's Low-Density Supersonic Decelerator (LDSD) was previewed during a June 1 press briefing. LDSD will launch no earlier than 1:30 p.m. EDT (7:30 a.m. HST) Wednesday, June 3, from the U.S. Navy's Pacific Missile Range Facility (PMRF) on Kauai, Hawaii. NASA Television coverage will begin at 1 p.m. EDT (7 a.m. HST). The project is designed to investigate and test breakthrough technologies for landing future robotic and human Mars missions and safely returning large payloads to Earth. The test, performed over the Pacific Ocean, will simulate the supersonic entry and descent speeds at which the spacecraft would be traveling through the Martian atmosphere.
NASA’s Low-Density Supersonic Decelerator project was the focus of a November 5 “What's New in Aerospace?” discussion at the Smithsonian National Air and Space Museum, featuring Principal Investigator Ian Clark from the Jet Propulsion Laboratory. LDSD is testing cross-cutting technologies to safely land heavier payloads on Mars and other planets with atmospheres. The successful flight in late June of its rocket-powered, saucer-shaped test vehicle into near-space in Kauai, Hawaii was the first of three planned for the LDSD project.