This TRW design of 1965 used a unique concept - a lifting body main stage, that provided both ascent propulsion and re-entry protection.

The main stage was 8.17 m long, had a 4.88 m wingspan, and could accommodate a payload of 24.4 cubic meter volume. The 7300 kg gross weight included a separable manned aircraft of 6.4 m length, which had a delta wing of 62 degrees sweep and a span of 4.05 m. The vertical stabilizers turned down from each wingtip. After the mother ship had re-entered the atmosphere, the manned aircraft would separate at Mach 0.6 and 9150 m altitude. Equipped with a single turbojet, a nosewheel, and aft landing skids, it would proceed to a landing at a conventional airfield. The main stage would descend to earth under a parachute and be recovered for re-use. The whole concept was strikingly similar to Chelomei's Kosmoplan, which was being cancelled in the Soviet Union just as the TRW study was completed.

Length: 8.17 m (26.80 ft). Span: 4.88 m (16.01 ft). Mass: 7,300 kg (16,000 lb).

• Jenkins, Dennis R,, Space Shuttle: The History of the National Space Transportation System : The First 100 Missions, Third edition, Voyageur Press, 2001. ISBN: 0963397451. Excellent - the most comprehensive account of the design, development, and flights of the space shuttle.Takes the reader from the maze of designs during the first shuttle competition to future plans. More at amazon.com...