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Spacemaster
Spacemaster
Credit: NASA
Status: Study 1967. Thrust: 24,905.80 kN (5,599,047 lbf). Gross mass: 1,587,302 kg (3,499,401 lb). Height: 128.00 m (419.00 ft). Diameter: 8.00 m (26.20 ft).
Martin Marietta's unsolicited company-funded shuttle proposal was named "Spacemaster". It was designed for carrying 11,340-22,680 kilogram payloads in the same 4.57 * 18.3-meter cargo envelope as the other Phase A shuttle proposals. Martin's twin-body booster would have reduced the overall length of the mated vehicle and would also have been compatible with different orbiters or rocket stages between bodies. The booster rocket engines are on the aft end of each body. Since the orbiter would be nested during ascent, Martin Marietta predicted that the center of gravity shift from lift-off to staging would be relatively small. The nested orbiter design would also have reduced booster rocket engine gimbal angles, ascent drag and vehicle angle of attack. The booster landing jet motors were installed in the forward wing to achieve a good center-of-gravity location.
Stage Data - Spacemaster
- Stage 1. 1 x Spacemaster-1. Gross Mass: 1,224,490 kg (2,699,530 lb). Empty Mass: 203,342 kg (448,292 lb). Thrust (vac): 28,082.538 kN (6,313,206 lbf). Isp: 442 sec. Burn time: 155 sec. Isp(sl): 392 sec. Diameter: 8.00 m (26.20 ft). Span: 45.12 m (148.03 ft). Length: 57.93 m (190.05 ft). Propellants: Lox/LH2. No Engines: 14. Engine: SSME Study. Status: Study 1967. Comments: Unique Catamaran configuration.
- Stage 2. 1 x Spacemaster-2. Gross Mass: 362,812 kg (799,863 lb). Empty Mass: 80,000 kg (176,000 lb). Thrust (vac): 4,549.049 kN (1,022,667 lbf). Isp: 459 sec. Burn time: 276 sec. Isp(sl): 359 sec. Diameter: 6.71 m (22.01 ft). Span: 32.62 m (107.02 ft). Length: 48.78 m (160.03 ft). Propellants: Lox/LH2. No Engines: 2. Engine: SSME Study. Status: Study 1967. Comments: Delta Winged, Cross Range 2,742 km.
Family: orbital launch vehicle, Winged. Country: USA. Engines: SSME Study. Stages: Spacemaster-1, Spacemaster-2. Agency: Martin. Bibliography: 44, 504.
 | Spacemaster Credit: NASA |
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