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Latest Spacecraft propulsion Stories

2011-05-26 13:00:00

WASHINGTON, May 26, 2011 /PRNewswire-USNewswire/ -- NASA is seeking proposals for services from commercial suborbital flight providers and payload integrators to support the agency's Flight Opportunities Program, which is part of NASA's Office of the Chief Technologist. (Logo: http://photos.prnewswire.com/prnh/20081007/38461LOGO) NASA will award contracts to multiple vendors capable of providing payload integration and flight services on commercial suborbital reusable launch vehicles....

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2011-05-24 09:25:00

The European Space Agency (ESA) has concluded its review of the U.K. spaceplane concept and found nothing keeping it from continuing on, reports BBC News. The Skylon vehicle would be a rocket that operates like an airliner, taking off and landing at a conventional runway. ESA plans the next stage of development to be a ground demonstration of its Sabre engine. The engine is designed to breathe oxygen from the air in the early phases of flight before switching to full rocket mode as the...

2011-05-13 15:00:00

WASHINGTON, May 13, 2011 /PRNewswire-USNewswire/ -- NASA has selected 16 payloads for flights on the commercial Zero-G parabolic aircraft and two suborbital reusable launch vehicles as part of the agency's Flight Opportunities Program. The flights provide opportunities for space technologies to be demonstrated and validated in relevant environments. In addition, these flights foster the development of the nation's commercial reusable suborbital transportation industry. (Logo:...

2011-05-07 16:21:00

WEST PALM BEACH, Fla., May 7, 2011 /PRNewswire/ -- Pratt & Whitney Rocketdyne today demonstrated its ongoing commitment to national defense by boosting into orbit the U.S. military's first Space Based Infrared System Geosynchronous satellite (SBIRS GEO 1) for early-warning missile detection. The mission was launched from Cape Canaveral Air Force Station in Florida by a United Launch Alliance Atlas V rocket. The Atlas V is powered by the RD AMROSS RD-180 booster engine, and the...

2011-04-28 07:00:00

MINNEAPOLIS, April 28, 2011 /PRNewswire/ -- ATK (NYSE: ATK) has received an $80 million order from General Dynamics Armament and Technical Products for production of the MK90 propellant grain. "We are pleased to have this opportunity to continue our longstanding tradition of production excellence on the MK90 propellant grain," said Kent Holiday, ATK Energetic Systems Vice President and General Manager. "We have made this propellant grain, or its predecessor design, for many years, and...

2011-04-15 01:47:00

CANOGA PARK, Calif., April 15, 2011 /PRNewswire/ -- Pratt & Whitney Rocketdyne today demonstrated its continued support of national security by helping to boost into orbit a spacecraft for the U.S. government. The mission was launched from Vandenberg Air Force Base in California by a United Launch Alliance Atlas V rocket. The Atlas V is powered by the RD AMROSS RD-180 booster engine and the Centaur upper stage is powered by the Pratt & Whitney Rocketdyne RL10 engine. Pratt &...

2011-04-06 16:08:00

SACRAMENTO, Calif., April 6, 2011 /PRNewswire/ -- Aerojet, a GenCorp (NYSE: GY) company, and NEC Corporation (NEC; TSE: 6701) announced today that they have successfully operated a Japanese HAYABUSA low power microwave ion engine at Aerojet's facility in Redmond, Wash. These ion propulsion systems provide propellant efficiencies more than 10 times higher than those of conventional propulsion systems for use on low Earth orbit, geosynchronous and deep space missions. This test is an...

2011-03-31 07:00:00

SACRAMENTO, Calif., March 31, 2011 /PRNewswire-FirstCall/ -- Aerojet, a GenCorp (NYSE: GY) company, announced today that its thrusters on the Voyager 1 spacecraft assisted in several critical repositionings of the spacecraft over 10 billion miles away from the sun, at the edge of the solar system. On March 8, 2011, the 34-year-old Voyager 1 spacecraft did the deep space equivalent of a gymnastics routine at the Olympics as it rolled 70 degrees counterclockwise from its normal orientation...

2011-03-30 16:05:00

SACRAMENTO, Calif., March 30, 2011 /PRNewswire-FirstCall/ -- Aerojet, a GenCorp (NYSE: GY) company, in conjunction with Lockheed Martin and NASA, successfully completed vibration and hot fire acceptance testing on its first development MR-104G mono-propellant rocket engine planned for use on NASA's Orion Crew Module (CM). Twelve 160-lb. thrust MR-104G engines, arranged in four single-engine pods and four dual-engine pods, provide the full complement of primary and redundant control...

2011-03-23 11:45:00

NIAGARA FALLS, N.Y., March 23, 2011 /PRNewswire/ -- AMPAC-ISP CORP., American Pacific Corporation's (Nasdaq: APFC) wholly-owned in-space propulsion subsidiary (AMPAC-ISP), reported that their LEROS 1b bipropellant engine (LEROS 1b) fired for nearly fifteen minutes in the early hours on March 18, 2011 to slow the MESSENGER (MErcury Surface, Space ENvironment, GEochemistry, and Ranging) spacecraft and place it into orbit around Mercury. The orbit insertion firing slowed the spacecraft by more...


Latest Spacecraft propulsion Reference Libraries

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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
sough
  • A murmuring sound; a rushing or whistling sound, like that of the wind; a deep sigh.
  • A gentle breeze; a waft; a breath.
  • Any rumor that engages general attention.
  • A cant or whining mode of speaking, especially in preaching or praying; the chant or recitative characteristic of the old Presbyterians in Scotland.
  • To make a rushing, whistling, or sighing sound; emit a hollow murmur; murmur or sigh like the wind.
  • To breathe in or as in sleep.
  • To utter in a whining or monotonous tone.
According to the OED, from the 16th century, this word is 'almost exclusively Scots and northern dialect until adopted in general literary use in the 19th.'
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