Sept 30 1975
From The Space Library
Marshall Space Flight Center had resumed acoustic testing of a 6.4%-scale model of the Space Shuttle to provide information needed in designing the Shuttle and its launch facilities, MSFC announced. The tests would also produce data on effects of hot exhaust gases on the aft portion of the Shuttle immediately after ignition. Data from earlier testing of the model, which included the liquid-fueled engines and solid rocket motors, had alerted designers that special provisions would be needed to deflect hot gases out of the Solid Rocket Boosters away from the facility fuel lines near the launch pad. A pad design based on this analysis had been tested and proven. During the tests, which had begun originally in August 1974, the model was held in a test stand while its engines were fired from 6 to 10 sec. (MSFC Release 75-205)
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