Mars 1946 lander
Credit: © Mark Wade
American manned Mars orbiter. Study 1952.
Using the same basic systems as the Passenger Ship, the Cargo Ships would substitute a 200 metric ton Landing Boat for the surface expedition and 195 metric tons of other supplies (consumables, spares, atmospheric and surface probes. The Cargo Ships would be left behind in Mars orbit and perform just two major maneuvers: Trans-Mars Injection (3860 m/s) and Mars Orbit Insertion (2200 m/s).
Structure: 6,300 kg (13,800 lb). Reaction Control System: 1,000 kg (2,200 lb). Navigation Equipment: 1,500 kg (3,300 lb). Electrical Equipment: 1,000 kg (2,200 lb). Communications Systems: 500 kg (1,100 lb). RCS Fine No x Thrust: Flywheels. Spacecraft delta v: 6,200 m/s (20,300 ft/sec).
Gross mass: 3,720,000 kg (8,200,000 lb).
More... - Chronology...
Unfuelled mass: 414,000 kg (912,000 lb).
Payload: 395,000 kg (870,000 lb).
Height: 64.00 m (209.00 ft).
Diameter: 20.00 m (65.00 ft).
Thrust: 1,960.00 kN (440,620 lbf).
Specific impulse: 297 s.
Associated Manufacturers and Agencies
Von Braun American manufacturer of rockets and spacecraft. Von Braun, USA. More...
Nitric acid/Hydrazine Drawing on the German World War II Wasserfall rocket, nitric acid (HNO3) became the early storable oxidiser of choice for missiles and upper stages of the 1950's. To overcome various problems with its use, it was necessary to combine the nitric acid with N2O4 and passivation compounds. These formulae were considered extremely secret at the time. By the late 1950's it was apparent that N2O4 by itself was a better oxidiser. Therefore nitric acid was almost entirely replaced by pure N2O4 in storable liquid fuel rocket engines developed after 1960. Hydrazine (N2H4) found early use as a fuel, but it was quickly replaced by UDMH. It is still used as a monopropellant for satellite station-keeping motors. More...
Miller, Ron, The Dream Machines, Krieger, Malabar, Florida, 1993.
Von Braun, Wernher, The Mars Project, University of Illinois Press, 1991.
Portree, David S. F., Humans to Mars: Fifty Years of Mission Planning, 1950 - 2000, NASA Monographs in Aerospace History Series, Number 21, February 2001.
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