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Latest Spacecraft propulsion Stories

Researchers Developing Elecrohydrodynamic Thrust Technology
2013-04-03 19:12:11

Lee Rannals for redOrbit.com — Your Universe Online MIT researchers writing in the journal Proceedings of the Royal Society A say they found ionic wind thrusters may be a more efficient source of propulsion than conventional jet engines. Ionic wind, or electrohydrodynamic thrust, was first identified in the 1960s. The phenomenon takes place when a current passes between two electrodes, creating a wind in the air between. If enough voltage is applied, the wind produces a thrust...

2013-02-15 08:11:01

NASA has selected Aerojet of Sacramento, Calif., for a $23.3 million contract to develop engineering demonstrations and risk reduction concepts for future advanced boosters for the agency's Space Launch System (SLS). Aerojet is one of four companies contracted under a NASA Research Announcement (NRA) to improve the affordability, reliability and performance of an advanced booster for a future version of the SLS heavy-lift rocket. The SLS vehicle will take the agency's Orion...

2013-02-13 17:45:20

Electric rocket engines known as Hall thrusters, which use a super high-velocity stream of ions to propel a spacecraft in space, have been used successfully onboard many missions for half a century. Erosion of the discharge channels walls, however, has limited their application to the inner solar system. A research team at Caltech's Jet Propulsion Laboratory, in Pasadena, Calif., has found a way to effectively control this erosion by shaping the engine's magnetic field in a way that shields...

NASA To Test 13 New Reusable Flight Technologies
2013-01-22 18:50:00

Lee Rannals for redOrbit.com — Your Universe Online NASA said it has selected 13 new technologies to ride along payloads for flights on commercial reusable launch vehicles, balloons and a commercial parabolic aircraft in 2013 and 2014. The flights will enable participants to demonstrate their technologies, allowing them to touch the edge of space to see how well they will be prepared for the harsh conditions of spaceflight. Las Vegas-based Zero-G Corporation's parabolic...


Latest Spacecraft propulsion Reference Libraries

6_e1c9b89b48eaf2af7055b7bbebf1a19c2
2004-10-19 04:45:41

Escape Velocity -- An escape velocity is the minimum speed at which an object without propulsion can move away from a source of a gravitational field indefinitely if there is no friction. This definition may need modification for the practical problem of two or more sources in some cases. In any case, the object is assumed to be a point with a mass that is negligible compared with that of the source of the field, usually an excellent approximation. It is commonly described as the speed...

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Word of the Day
mallemaroking
  • Nautical, the visiting and carousing of sailors in the Greenland ships.
This word is apparently from a confusion of two similar Dutch words: 'mallemerok,' a foolish woman, and 'mallemok,' a name for some persons among the crew of a whaling vessel.