Which low-bypass afterburning turbofan jet engine is used to power the Saab JAS 39 Gripen?
Saab JAS 39 Gripen The Saab JAS 39 Gripen (English: "griffin" ) is a light single-engine multirole fighter aircraft manufactured by the Swedish aerospace company Saab. It was designed to replace the Saab 35 Draken and 37 Viggen in the Swedish Air Force ("Flygvapnet"). The Gripen has a delta wing and canard configuration with relaxed stability design and fly-by-wire flight controls. It is powered by the Volvo RM12, and has a top speed of Mach 2. Later aircraft are modified for NATO interoperability standards and to undertake in-flight refuelling.
J-2X The J-2X is a liquid-fueled cryogenic rocket engine that was planned for use on the Ares rockets of NASA's Constellation program, and later the Space Launch System. Built in the United States by Aerojet Rocketdyne (formerly, Pratt & Whitney Rocketdyne), the J-2X burns cryogenic liquid hydrogen and liquid oxygen propellants, with each engine producing 1307 kN of thrust in vacuum at a specific impulse ("I") of 448 isp . The engine's mass is approximately 2,470 kg (5,450 Lb), significantly heavier than its predecessors.