Northrop built two YF-23A prototypes: the first YF-23 (serial number 87-0800), Prototype Air Vehicle 1 (PAV-1), was rolled out on 22 Jun. 1990 and took its 50-minute maiden flight on Aug. 27 with ...
General Electric (GE) has revealed design details of the turbofan ramjet at the heart of one of NASA's long-term third-generation Space Shuttle replacement proposals. The Revolutionary Turbine ...
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