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Dynamic Prop Balance

in 912 / 914 Technical Questions 7 years ago
I'm looking for information on vibration sensor placement (front of engine) dynamic propeller balancing on a 912ULS. I have information related to generic placement from SL-912-010, but it is not addressing specifically the need for placement at 1)front of engine and 2) NOT in-line with a cylinder. I surmise I will have to fashion my own bracket. Has anyone tackled this before? Found any ROTAX guidance on weight placement?

  • Re: Dynamic Prop Balance

    by » 7 years ago

    I place my vibration sensor right on top of the engine mounted to one of the open bolt holes. I put the photo tack sensor mounted on the #2 cylinder open screw hole on top and front of the cylinder.

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell

      
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  • Re: Dynamic Prop Balance

    by » 7 years ago

    we put the accelerometer near the gearbox; on the vac pump pad (if available) or one of the gearbox screws. If you are taking a spectrum analysis as well as a balance this is the best place, as the gearbox is the most likely item to produce interetesting vibs.
    DSSsensormounting.jpg (You do not have access to download this file.)
      
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  • Re: Dynamic Prop Balance

    by » 7 years ago

    Same as I do except I'm in the open hole just behind that one.

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell

      
    Report

  • Re: Dynamic Prop Balance

    by » 7 years ago

    What brand do you use for dynamic balance please
      
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  • Re: Dynamic Prop Balance

    by » 7 years ago

    Mine is an Aces balancer

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell

      
    Report
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