May 31 1960
From The Space Library
100-foot inflatable sphere launched from NASA Wallops Station to an altitude of 210 miles to test payload configuration carrying two beacon transmitters, a development flight of Project Echo.
NASA disseminated telemetry calibration for EXPLORER VII to members of the Committee on Space Research (COSPAR).
NASA selected Rocketdyne Division of North American Aviation to develop a 200,000-pound-thrust engine utilizing hydrogen and oxygen propellants. This engine is second only to the F-1 in single-thrust chamber level.
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