The Saab JAS 39 Gripen (Griffin) is a lightweight single-engine multirole fighter 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 technology. It is powered by the Volvo-Flygmotor RM12 engine, a derivative of the General Electric F404, and has a top speed of Mach 2.