Scaled Composites White Knight tow bar

The Scaled Composites Model 318 White Knight (now also called WhiteKnightOne) is a jet-powered carrier aircraft used to launch the Scaled Composites SpaceShipOne experimental spacecraft. It was developed by Scaled Composites as part of their Tier One program. The aircraft is subsequently being offered by Scaled on a contract basis as a research testbed, and was also used for drop tests of the Boeing X-37 spaceplane from June 2005 until April 2006. It is also the predecessor to White Knight Two which added a "one" to its name to tell the two apart.