The U.S. Air Force has released plans to experiment with a prototype reusable, rocket-powered aircraft for high-speed, long-range strike missions.
Although limited to a prototype program, the interest from Air Force Global Strike Command points toward a future bomber alternative that differs markedly from the stealthy, subsonic Northrop Grumman B-21 Raider, which is now in the early stages of production.
The prototype described in solicitation documents released in mid-July calls for a liquid-fueled, rocket-powered, vertical-takeoff-and-landing (VTOL) aircraft. After launching vertically, or potentially on a steep diagonal trajectory, the aircraft would transition to horizontal flight and accelerate to high—likely supersonic or hypersonic—speed, perform a strike mission and then return to its launch base for a vertical landing.
The concept requires the maturation of several technologies. The Air Force solicitation documents list advanced liquid rocket propulsion, autonomous flight control, thrust-vector control, aerodynamic control surfaces, cryogenic propellant management and high-temperature structural materials to demonstrate stable flight, controlled transition between flight regimes and reliable system performance.
The Air Force plans to make a selection quickly. A contract could be awarded within 30-45 days of the Aug. 4 submission deadline.