TR-3C Role: Prototype vehicle, experimental Manufacturer: Lockheed, Northrop Corporation Diameter: 12m (39ft) Max Acceleration: 5.66G (55.56m/s²) First Flight: 19/07/1991 09G Role: Tactical airlift, orbital shuttle Manufacturer: General Dynamics Diameter: 70m (230ft) Max Acceleration: 22.67G (222.24m/s²) First Flight: 08/02/2001 TR-5A Role: Prototy