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发信人: murjun (萧牧), 信区: Aero
标 题: nasa运载火箭发射中断逃生应急实验系统研制成功EN
发信站: 哈工大紫丁香 (2003年11月07日21:35:49 星期五), 站内信件
November 6, 2003
Michael Braukus
Headquarters, Washington
(Phone: 202/358-1979)
Kelly Humphries
Johnson Space Center, Houston
(Phone: 281/483-5111)
RELEASE: 03-359
NASA CONDUCTS SUCCESSFUL PAD ABORT DEMONSTRATION
A launch pad abort test vehicle, being designed in support
of NASA's Orbital Space Plane (OSP) program, proved stable
in wind tunnel tests completed this month. The successful
tests set the stage for engine test firings and parachute
drop tests later this year.
The Pad Abort Demonstration (PAD) Project is designed to
demonstrate a crew rescue capability important to future
space transportation systems. The PAD will be a full-scale,
reusable system incorporating crew escape and survival
systems, subsystems and components using proven
technologies to help NASA achieve its goals of establishing
safe, reliable and affordable access to space.
The PAD vehicle, being designed by Lockheed Martin,
demonstrated the stability and maneuverability under
simulated conditions approximating escape from a
catastrophic launch vehicle failure. The tests were
conducted in September and October at Lockheed Martin's
High Speed Wind Tunnel in Grand Prairie, Texas.
Maintaining stability, without a complex attitude control
system, will ensure a safe transition to recovery under a
parachute cluster. The PAD flight profile consists of a
powered phase lasting five seconds, reaching six to eight
times the force of normal gravity and simulating separation
from the launch system after a pad mishap. The powered
phase is followed by an unpowered glide from Mach 0.9 (660
mph) down to Mach 0.3 (220 mph), when the parachute system
deploys.
"These wind tunnel tests are an important success on the way
to developing a safe and effective crew escape system,"
said Chuck Shaw, PAD Project Manager at NASA's Johnson
Space Center (JSC), Houston. "The tests follow September's
completion of the PAD Preliminary Design Review, pave the
way for initial testing of the vehicle's engine in November
and a first set of parachute drop tests in December," he
said.
NASA awarded a contract to Lockheed Martin in November 2002
to design and build a crew escape and survivability system
demonstrator and to establish a flexible test bed for use
in support of the OSP. The PAD Project is a pathfinder for
integrating a crew escape capability into spacecraft
design, something that has not been done since the Apollo
program.
For the initial flight test in mid-2005, the PAD will
consist of a representative crew escape module mounted on
the pusher propulsion module. A flared structure attached
to the propulsion module provides the necessary aerodynamic
stability. Flight tests will use instrumented mannequins to
measure the environments a human crew would experience.
The PAD project is managed at JSC. The OSP Program is
managed from NASA's Marshall Space Flight Center in
Huntsville, Ala.
The OSP program will support U.S. International Space
Station requirements for crew rescue, crew transport, and
contingency cargo. The vehicle will initially launch on an
expendable launch vehicle, to provide rescue capability for
no fewer than four Station crewmembers, as early as 2008.
Crew transfer to and from the Space Station is planned as
soon as practical but no later than 2012.
For more information about the program on the Internet,
visit:
http://www.ospnews.com For information about NASA on the
Internet, visit:
http://www.nasa.gov
-end-
--
我非常喜欢在有风有雨的季节计划自己;
有风有雨后的季节晒着阳光我昏昏睡去;
睡去的我依然在甜梦中将曾有过的温习;
温习昨天前天等等的种种激情与过去。
Jim Mural
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