Submission + - Falcon HTV-3X hypersonic cruiser tested
An anonymous reader writes: Pratt & Whitney Rocketdyne have successfully tested a sub-scale combustor for a dual-mode ramjet engine. This could power the Falcon HTV-3X (financed by DARPA) hypersonic cruiser to Mach 6 and beyond. With the Dual-mode, the engine can function both at subsonic speeds and then speed up to supersonic scramjet speeds (greater than Mach 5). This engine technology was developed for Lockheed Martin's Falcon Combined-Cycle Engine Technology (FaCET) program.