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Nahona Aeronautics and SpaceAdministration

Lyndon B. Johnson Space Centez Houston,Texas77058 AC713 483-5111

Terry White

ForRelease September 7, 1978

RELEASE NO:

78-40

SHUTTLE MANEUVER ENGINE TESTED AT WHITE SANDS

A test version of the rocket engine that will be used to maneuver

the Space Shuttle Orbiter was test fired September 6, at the NASA White Sands Test Facility near Las Cruces, New Mexico. The 10-second duration burn was the first test firing of the

6000-pound thrust engine in combination with the propellant tanks, feedlines and other components in the Orbital Maneuvering Subsystem

(OMS) pod.

Shuttle Orbiter has OMS pods on each side of

lage and adjacent to boost the spacecraft

the three 470,O00-pound into orbit.

thrust

main

the aft engines

fuse- that

The OMS engines burn nitrogen tetroxide and monomethyl hydrazine as oxidizer and fuel, and are designed to be reuseable for up to 100

space missions with 1000 starts for a total 15 hours firing lifetime. Among the orbital duties of the OMS engines are thrust for final orbital insertion at the end of launch phase, orbit circularization, orbit

transfer and changing, rendezvous maneuvers and deorbit burns.

Wednesday's test firing was a checkout of the OMS pod and test stand compatibility and of the test data system.

The first series of 24 engine firings up to 60-seconds duration

was completed the following day. ###

NASA-JSC

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