![]() “ATK continues to develop critical hardware and components for hypersonic propulsion systems with a focus on reliability, affordability, and low-risk,” said Bart Olson, Vice President and General Manager, ATK Tactical Propulsion and Controls. In previous testing, the ATK engine demonstrated ignition at Mach 3 conditions and robust operability up through Mach 5.5. The flight-weight engine components have now accumulated more than 44 minutes of hot operating time.Īfter being launched from an aircraft or from the surface, the TTRJ-powered vehicle would be rocket-boosted to high speed, enabling the ramjet to ignite. In this test series, ATK ran the fuel-cooled hardware through multiple two-minute long test periods to demonstrate full thermal equilibrium, thus ensuring all durability requirements can be met for both single-use and reusable flight systems. The resultant ALRJ-51-4 configuration has been further simplified over previous builds and has already demonstrated performance levels meeting or exceeding requirements. This latest test series incorporates lessons learned during the design, manufacture and testing that has been conducted over the last three years. ![]() Air Force and conducted at ATK’s Ronkonkoma, N.Y. This long-duration testing was funded by the U.S. The most recent tests involved flight-weight, fuel-cooled Thermally Throated RamJet (TTRJ) technology built with conventional materials and manufacturing processes, and burning readily-available JP-10 jet fuel. Finally, the Combined-Cycle Engine(CCE)Component Technology Development programs strive to combine ramjet/scramjet engines with trubine and rocket engines.All three programs contribute to AFRL's hypersonic propulsion development path.Alliant Techsystems announced today that it successfully completed testing for a new class of hypersonic propulsion systems that will enable High Speed Strike Weapons and Unmanned Aerial Vehicles to travel long distances at velocities more than five times the speed of sound. The Robust Sxramjet Program focus on hypersonic propulsion development: flowpath scaling, expanding the scramjet operating Mach envelope, and enabling fully reusable engines. The Hypersonic Technology(HyTech)program has had several successful engine ground tests, but true scramjet viability will be demonstrated with the X-51A Scramjet Engine Demonstrator-WaveRider(SED)flight test. These efforts are accomplished through three main programs at AFRL: the X-51A Scramjet Engine Demo program, the Robust Scramjet program, and the Combined Cycle Engine Component Development program. The Air Force Research Laboratory's(AFRL's)hypersonic propulsion research efforts focus on three key foundational concepts related to hypersonic propulsion: the hydrocarbon scramjet, combined cycle engine, and JP-type endothermic fuels. ![]()
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