Meeting the Challenge of the Expanding Performance Spectrum: The XB-70A Propulsion System 650841

This paper provides design and operational information on some of the components and subsystems of the Mach 3 XB-70A propulsion system, including the engine installation and servicing features, the sophisticated three-regime engine compartment cooling system, the engine starting system, and the electrically powered thrust control system. The mechanical drive system for the aircraft power accessories is described and results of integrated engine-drive system testing are shown. The paper is oriented toward providing information on some of the problems encountered and solutions achieved in designing hardware for a Mach 3 environment.


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