TESTS OF THE SATURN C-5, S-II ULLAGE MOTORS (RS-U-501) UNDER ALTITUDE ENVIRONMENT IN THE BLOWDOWN FACILITY, FOR THE SOLID ROCKET DIVISION, ROCKETDYNE, OF NORTH AMERICAN AVIATION, INC.,

Altitude static firing tests of the Saturn C-5, S-II Ullage rocket motors RS-U-501 were performed. The tests were the first altitude test firings of the Ullage motor. The objective was to evaluate the ballistic performance at design altitude. The two rocket motors were tested successfully. RT 010-D, conditioned to 20F, was fired at a simulated altitude of approximately 146.5 K feet. The sustained altitude during burning was approximately 141 K feet. RT 011-D, conditioned to 125F, was fired at a simulated altitude of approximately 153 K feet. The sustained altitude during burning was approximately 145.8 K feet. Author