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Engine Speed (RPM) Overshoot on 50% Throttle

in 912 / 914 Technical Questions 6 years ago

  • Re: Engine Speed (RPM) Overshoot on 50% Throttle

    by » 6 years ago

    What happens with the Manifold Pressure as the RPMs change without command?

    Just to cover all bases...
    Does this plane have a variable pitch prop?
    Does the gearbox have the clutch option installed?

    Bill Hertzel
    Rotax 912is
    North Ridgeville, OH, USA
    Clicking the "Thank You" is Always Appreciated by Everyone.

      
    Report

  • Re: Engine Speed (RPM) Overshoot on 50% Throttle

    by » 6 years ago

    what type of maintenance due after over shooting of RPM 6400-6500 IF OBSERVED.
      
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  • Re: Engine Speed (RPM) Overshoot on 50% Throttle

    by » 6 years ago

    6200-6500 Rpm overshoot for 63 second, where as 14 second only over shoot at 6500.
    Heavy maintenance book suggestest for valve guide Checking, crank shaft out of round verification etc.
    All system inspection, Detailed Engine afftected inspection.
    05-50-00 page 10
    what is expert suggestion please
      
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  • Re: Engine Speed (RPM) Overshoot on 50% Throttle

    by » 6 years ago

    Just took my Rotax training. Instructor said in case of overspeed pushrods must be inspected.
      
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  • Re: Engine Speed (RPM) Overshoot on 50% Throttle

    by » 6 years ago

    6200-6500 Rpm overshoot for 63 second, where as 14 second only over shoot at 6500.
    Heavy maintenance book suggestest for valve guide Checking, crank shaft out of round verification etc.
    All system inspection, Detailed Engine afftected inspection.
    05-50-00 page 10
    what is expert suggestion please


    As you are already aware, the expert suggestion IS the Line Maintenance Manual Section 05-50-00 Page 10.

    Over 6500 for ANY length of time...
    Complete Internal Engine inspection and Overhaul.
    Replace Crankshaft.
    Inspect/Replace Pushrods, Valve/Piston Collision. Compression Check, etc.

    Three options.
    1. Replace Engine.
    2. Overhaul Engine.
    3. Make sure your life insurance is current and pretend it didn't happen and fly on. :ohmy:

    You know you need to do Option #1 or #2.
    You are looking for somone to tell you Option #3 is OK! It isn't!

    Bill Hertzel
    Rotax 912is
    North Ridgeville, OH, USA
    Clicking the "Thank You" is Always Appreciated by Everyone.

    Thank you said by: RotaxOwner Admin, Capt. Siva,
      
    Report
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