Problems that occur during manned earth entry in return from planetary missions are reviewed to evaluate current technology and systems concepts; analytical results show that lift-to-drag ratio (L/D) of 0.5 provides sufficiently large entry corridor depth at velocities up to 55,000 fps to allow safe entry within capability of existing guidance and navigation systems; increase in vehicle slenderness to reduce radiant heating results in higher surface Reynolds numbers, thus increasing possibility of boundary-layer transition and attendant increase in convective heating; experimental data for ablative heat shield of Apollo command module imply that existing heat shields can provide efficient thermal protection for planetary return missions. (02636)


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    Title :

    Manned earth entry at hyperbolic velocities


    Additional title:

    J Spacecraft Rockets


    Contributors:

    Published in:

    Publication date :

    1968


    Size :

    7 pages


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English


    Keywords :



    Look at manned entry at circular to hyperbolic velocities

    Love, E.S. / Pritchard, E.B. | Engineering Index Backfile | 1963



    A LOOK AT MANNED ENTRY AT CIRCULAR TO HYPERBOLIC VELOCITIES

    Love, E. S. / Pritchard, E. B. | NTRS | 1963


    A LOOK AT MANNED ENTRY AT CIRCULAR TO HYPERBOLIC VELOCITIES

    Love, E. S. / Pritchard, E. B. | NTRS | 1963