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    On the Apollo spacecrafts, what did the Service Module Reaction control subsystem quad do?

    Question #21045. Asked by I am not a geek. (Aug 01 02 1:34 AM)


    elburcher

    The system provides the small velocity changes required for service propulsion
    subsystem propellant settling maneuvers (ullage). Only roll axis control is
    provided during service propulsion engine thrusting. In addition, it provides
    velocity changes for spacecraft separation from the third stage during high
    altitude or translunar injection abort, for separation from the boost vehicle
    after injection of the spacecraft into translunar trajectory, LM rendezvous in
    lunar orbit, and for CM-SM separation.

    http://www.thebest.net/jduncan/asnr/p147-158.htm

    Aug 01 02, 1:48 AM
    Kainantu





    It was used to carry out ullage requirements, perform stabilization maneuvers during flight and to separate service and command modules prior to reentry.

    The unit had sixteen small rocket engines which were arranged in clusters of four, hence the name quad.

    Propellants were nitrogen tetroxide and hydrazine 50/50

    Each engine was 14 inches long,the largest diameter being six inches.

    Each engine weighed 5 pounds and had a had a thrust of 100 lbs.


    Aug 01 02, 2:09 AM


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