Was the NASP (1983-1995) supposed to have the same payload as the Space-Shuttle? Aerospaceplane
Or was that never published?
(1957-1963) from 30,000 to 38,000 poundsduPont NASP
- 2,500 pounds
('During 1984, amid the Copper Canyon activities, Tony duPont devised a conceptual
configuration that evolved into the programís baseline. It had a gross weight of 52,650 pounds, which included a 2,500-pound payload that it was to carry to polar orbit. Its weight of fuel was 28,450 pounds. The propellant mass fraction, the ratio of these quantities, then was 0.54. The fuel had low density and was bulky, demanding high weight for the tankage and airframe. To save weight, duPontís concept had no landing gear. It lacked reserves of fuel; it was to reach orbit by burning its last drops. Once there it could not execute a controlled deorbit, for it lacked maneuvering rockets as well as fuel and oxidizer for them. DuPont also made no provision for a reserve of weight to accommodate normal increases during development.' - Heppenheimer)NASP X-30