For Release: May 23, 1995

Steve Roy
Marshall Space Flight Center
Huntsville, Alabama
(Phone: 205-544-6535)

Note To Editors: 95-35N

ENGINE TEST SCHEDULED AT MARSHALL CENTER WEDNESDAY

NASA engineers are scheduled to test fire an instrumented modified Space Shuttle Main Engine for 190 seconds, Wednesday afternoon, May 24, in the Advanced Engine Test Facility at the Marshall Space Flight Center in Huntsville, Ala.

The test focuses primarily on further evaluation of a start sequence and design changes of the alternate high pressure fuel turbopump for the Space Shuttle Main Engine development program.

New technologies to be demonstrated include further evaluation of cryogenic pressure sensors and an improved laser liquid-level sensing system for measuring liquid hydrogen levels in the fuel tank.

The engine will be operated at between 88 and 109 percent power levels during the run. The test will be the fifty-seventh test firing of a modified Space Shuttle engine in the former Saturn V engine test facility.