Future earth-to-orbit vehicles may be required to reach orbit within hours or even minutes of a decision. A study has been conducted to consider vehicles with such a capability. In Phase I of the study, 11 vehicles were designed to deploy 5000 lb to a polar orbit. Changes in the designs were examined parametrically for increased on-orbit maneuvers, increased payload, and other mission variations. Based on the results, two concepts were selected for Phase II design work: a vertical-takeoff, two-stage system and a horizontal-takeoff, two-stage system with an airbreathing subsonic first stage. The results of several propulsion evaluations are presented, including liftoff thrust-to-weight effects, dual-fuel propulsion for a horizontal-takeoff concept, and the effect of using fluorine.


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    Title :

    Propulsion evaluation for orbit-on-demand vehicles


    Contributors:

    Publication date :

    1985-07-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




    Propulsion evaluation for orbit-on-demand vehicles

    MARTIN, JAMES A. / NAFTEL, J. CHRIS / TURRIZIANI, R. VICTOR | AIAA | 1986


    Propulsion evaluation for orbit-on-demand vehicles

    Martin, James A. / Naftel, J. Chris / Turriziani, R. Victor | NTRS | 1986


    Propulsion evaluation for orbit-on-demand vehicles

    MARTIN, J. / NAFTEL, J. / TURRIZIANI, R. | AIAA | 1985