Freeflight Atmospheric Scramjet Test Technique (FASTT)
ATK is designing and developing a missile-configured hypersonic scramjet for the Freeflight Atmospheric Scramjet Test Technique (FASTT) program sponsored by the Defense Advanced Research Projects Agency (DARPA) and the Office of Naval Research (ONR).

In 2005, ATK, DARPA, and ONR successfully ground-launched and flew a FASTT vehicle, marking the first-ever free flight of a scramjet-powered vehicle using a conventional liquid hydrocarbon jet fuel and a major step forward in advanced hypersonic weaponry. As the system integrator, ATK designed and built the FASTT vehicle and also served as the mission manager for both the launch and the test flight.

ATK is the world leader in the development of hypervelocity and air-breathing propulsion systems. In 2004, the X-43 hypersonic flight vehicle built by ATK for NASA set the world speed record for air-breathing powered flight at Mach 10 or nearly 7,000 miles per hour. ATK is also designing and developing scramjet propulsion engines for the X-51 Robust Scramjet program, a U.S. Air Force initiative to advance the state of the art for liquid hydrocarbon and hydrogen-fueled scramjet propulsion systems.