NASA Technical Reports Server (NTRS) : Low pdf

NASA Technical Reports Server (NTRS) : Low

More Book Details

Description of the Book:

Low thrust chemical (hydrogen-oxygen) propulsion systems configured specifically for low acceleration orbit transfer of large space systems were defined. Results indicate that it is cost effective and least risk to combine the OTV and stowed spacecraft in a single 65 K Shuttle. The study shows that the engine for an optimized low thrust stage (1) does not require very low thrust; (2) 1-3 K thrust range appears optimum; (3) thrust transient is not a concern; (4) throttling probably not worthwhile; and (5) multiple thrusters complicate OTV/LSS design and aggravate LSS loads. Regarding the optimum vehicle for low acceleration missions, the single shuttle launch (LSS and expendable OTV) is most cost effective and least risky. Multiple shuttles increase diameter 20%. The space based radar structure short OTV (which maximizes space available for packaged LSS) favors use of torus tank. Propellant tank pressures/vapor residuals are little affected by engine thrust level or number of burns

• Creator/s: NASA Technical Reports Server (NTRS
• Date: 9/26/1980
• Year: 1980
• Book Topics/Themes: NASA Technical Reports Server (NTRS), LARGE SPACE STRUCTURES, LOW THRUST PROPULSION, ORBIT TRANSFER VEHICLES, SPACE PLATFORMS, SPACE TRANSPORTATION SYSTEM, COST EFFECTIVENESS, MISSION PLANNING, PRESSURE VESSELS, PROPELLANT TANKS, PROPULSION SYSTEM CONFIGURATIONS, SPACE MAINTENANCE

An excerpt captured from the PDF book