WhiteKnightTwo is a spaceplane developed by Scaled Composites to serve as a carrier for the SpaceShipTwo suborbital space tourism vehicle. It is designed to take off from a runway, ascend to a high altitude, and then release SpaceShipTwo for its journey into space. The aircraft features a unique twin-fuselage design, allowing it to carry SpaceShipTwo beneath its wings. WhiteKnightTwo is powered by four engines and has been instrumental in the development of commercial spaceflight, providing a platform for testing and launching space tourism missions.