American orbital launch vehicle. In August 1989 NASA studied a version of the Shuttle-C with two Advanced Solid Rocket Motors (ASRM's) in place of the standard RSRM's. This would increase the payload by 4500 kg, but also require use of a new 10 m x 30 m payload module.
Status: Design 1990. Payload: 81,500 kg (179,600 lb). Apogee: 407 km (252 mi).
LEO Payload: 81,500 kg (179,600 lb) to a 407 km orbit at 28.50 degrees.