Production reusable single-stage-to-orbit launch vehicle using technology developed in X-33 testbed.

Crew Size: 1. Length: 39.70 m (130.20 ft). Maximum Diameter: 39.00 m (127.00 ft). Mass: 991,000 kg (2,184,000 lb). Main Engine Thrust: 13,386.000 kN (3,009,292 lbf). Associated Launch Vehicle: Venturestar.