Citing advances in modeling and manufacturing, DARPA will try again to demonstrate a turbine-based combined-cycle (TBCC) engine that can operate from zero airspeed to beyond Mach 5, to power future air-breathing reusable hypersonic vehicles. DARPA has launched the Advanced Full-Range Engine (AFRE) program, a two-phase effort planned to culminate in ground-based testing of a full-scale integrated technology-demonstrator system. Potential bidders will be briefed on the program on July 13-14 ...

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