Altitude Developmental Testing of the J-2S Rocket Engine in Rocket Development Test Cell (J-4) (Tests J4-1902-08, -11, and -12)
Interim rept. 2 Apr-9 May 1969
ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFS TN
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Six firings of the Rocketydne J-2S rocket engine were conducted in Test Cell J-4 of the Rocket Test Facility on April 2, May 6, and May 9, 1969. These firings were accomplished during test periods J4-1902-08, -11, and -12 at pressure altitudes at engine start ranging from 80,500 to 101,500 ft. Objectives were to develop high-thrust idle-mode operation capability and to develop transition capability from high-thrust idle mode to main stage without utilization of the solid-propellant turbine starter. The first attempt at high- thrust idle-mode operation firing 08A was not successful however, during test periods 11 and 12 transition was accomplished from low to high thrust approximately 4000- to 50,000-lbf thrust idle mode and from high-thrust idle mode to main stage during firing 12C.
- Liquid Propellant Rocket Engines