Other
Scientific paper
Sep 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985hitec...5...57h&link_type=abstract
High Technology (ISSN 0277-2981), vol. 5, Sept. 1985, p. 57-59.
Other
Nasa Programs, Orbit Transfer Vehicles, Reusable Spacecraft, Space Tugs, Spacecraft Design, Aerobraking, Costs, Liquid Rocket Propellants, Propellant Storage, Rocket Engine Design, Spacecraft Maneuvers, Thermal Insulation
Scientific paper
The Space Shuttle itself can fly no higher than a few hundred miles, while many spacecraft, such as, for example, the communication satellites, must go to a higher orbit. Currently NASA is relying on a variety of upper stages to place the spacecraft into the desired orbit. This approach has, however, a number of disadvantages. Contracts for initial studies on a space tug, or reusable orbital transfer vehicle (OTV), have, therefore, been awarded. The OTV is to have the capability to carry large payloads to geosynchronous orbit and beyond. An American aerospace company is studying the use of liquid hydrogen and liquid oxygen as propellants for the OTV. Another company has proposed the use of propellants which remain liquid at room temperature. A possible solution to the liquid hydrogen problem involves the use of a multilayer insulation for storing liquid hydrogen in space. The use of the OTV in connection with a lunar base is also considered.
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