X-41 Common Aero Vehicle
X -41 Common Aero Vehicle is a standing under lock and development project for a U.S. military spacecraft. Specifications or images have not been published, so no details or objectives of the project are known. The X - 41 was described as a controllable reentry aircraft that can release a payload of 450 kg for suborbital hypersonic flight in the atmosphere.
The X -41 is part of the FALCON program and is funded by NASA and DARPA.