The Two Stage To Orbit (TSTO) Concorde-sized Spacecab would deliver a payload of six persons to low Earth orbit. It would serve as a prototype for the larger 50-person Spacebus.
Status: Study 1990. Height: 64.90 m (212.90 ft). Diameter: 28.00 m (91.00 ft).
The Spacecab used an airbreathing supersonic / hypersonic, delta winged first stage and a second stage powered by a liquid fuelled rocket engine.