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Thread: Toothed Belt PRU

  1. #1

    Join Date
    Nov 2011
    Posts
    1

    Toothed Belt PRU

    I would like to know what would happen to the propeller if the toothed belt normally used in belt PRU it cut (due overload dynamic load/bad design).
    Would the propeller be subject to overspeed?
    Any help on this matter will be very welcome.
    Cheers

  2. #2

    Join Date
    Aug 2011
    Location
    Alabama
    Posts
    1,652
    If the question is "what happens if the PSRU belt breaks," you've got it backwards.

    The prop would loose all drive to it and windmill.

    The engine would jump RPM's like mad, as it would no longer have any resistance from it by the prop.

    Think of it as any other belt fed device attached to an engine. If a fan belt breaks on a car, the alternator doesn't speed up, it stops.
    The opinions and statements of this poster are largely based on facts and portray a possible version of the actual events.

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