Pratt & Whitney Rocketdyne Reaches Milestone in Development of Next Rocket Engine for Human Spaceflight

  Pratt & Whitney Rocketdyne Reaches Milestone in Development of Next Rocket
                         Engine for Human Spaceflight

PR Newswire

CANOGA PARK, Calif., April 24, 2013

CANOGA PARK, Calif., April 24, 2013 /PRNewswire/ -- Pratt & Whitney
Rocketdyne, the rocket-engine manufacturer that helped power American
astronauts to the moon during the Apollo era, has completed the last in a
series of hot-fire tests on a J-2X engine with a stub-nozzle extension at
simulated altitude conditions. This latest chapter in the development of
America's next rocket engine paves the way toward full-motion testing of the
J-2X engine, which is designed to power humans to Mars. NASA has selected the
J-2X as the upper-stage propulsion for the evolved 143-ton (130-metric-ton)
Space Launch System (SLS), an advanced heavy-lift launch vehicle. Pratt &
Whitney Rocketdyne is a United Technologies Corp. (NYSE:UTX) company.

"This test series with the stub-nozzle extension was very successful," said
Walt Janowski, J-2X program manager, Pratt & Whitney Rocketdyne. "We
completed all the objectives we set out to accomplish, and acquired important
information to help us better understand how the engine will perform during
flight – from thrust, hardware durability and combustion stability. We look
forward to continuing to work with NASA to provide a safe, reliable
transportation system to explore new destinations in space."

In the latest series of tests with the stub-nozzle extension, J-2X Engine
10002 was tested six times for a total of 2,156 seconds on the A-2 test stand
at John C. Stennis Space Center in Mississippi. The stub-nozzle extension
allows engineers to test the engine in near-vacuum conditions, similar to what
it will experience in the extreme environment of space. The next step is to
move the engine to the A-1 test stand, where it will be fired to test the
range of gimbal motion for its flexible parts. Engine 10002 is the second
J-2X development engine built by Pratt & Whitney Rocketdyne for NASA. The
first J-2X engine, Engine 10001, was testeda total of 21 times for more than
45 minutes last year. The J-2X powerpack, which consists of components on top
of the engine, was tested separately 13 times for a total of more than 100
minutes at Stennis Space Center. The engines and powerpack were fired at
varying pressures, temperatures and flow rates to ensure the engine is ready
to support exploration beyond low-Earth orbit, Mars and beyond. 

Pratt & Whitney Rocketdyne, a part of Pratt & Whitney, is a preferred provider
of high-value propulsion, power, energy and innovative system solutions used
in a wide variety of government and commercial applications, including engines
for launch vehicles, missile defense systems and advanced hypersonic engines.
Behind its successful designs, manufacturing processes, and hardware are Pratt
& Whitney Rocketdyne's research and development engineers, who solve tough
problems in extreme environments. For more information, go to Follow us at and

Pratt & Whitney is a world leader in the design, manufacture and service of
aircraft engines, space propulsion systems, auxiliary and ground power units,
small turbojet propulsion products and industrial gas turbines. United
Technologies, based in Hartford, Conn., is a diversified company providing
high technology products and services to the global aerospace and commercial
building industries.

SOURCE Pratt & Whitney Rocketdyne

Contact: Erin Dick, Pratt & Whitney Rocketdyne, +1-818-586-4977,, or Carri Karuhn, Pratt & Whitney Rocketdyne,
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