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  1. #1

    Join Date
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    zdz 50ng broke alone

    hi yesterday i was flying and the engine stop , land the plane look at thee engine and was broke like the photo , wath coul cause that , the engine has one year of use .

    thanks
    marcelo
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  2. #2

    RE: zdz 50ng broke alone

    Looks like a serious vibration induced failure caused by header and pipe oscillations....?
    Mike Dooley
    RC Showcase

  3. #3

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    RE: zdz 50ng broke alone

    i dont think , because the engine is mount directly to the fairwall, and the header is mounted like the photo and the canister is very soft mounted

    the engine was running like tihs for about a year and a halft
    may be is a engine problem bad metals
    wath dou you think??

  4. #4

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    RE: zdz 50ng broke alone

    Hello! Looking the photo of the crankcase, it didnยดt seems like a fatigue brake, so i think is not a problem of vibrations. How were the conn rod, cylinder and piston? One possibility is that if the bolts from the oposite side of the broken area were untight or loosed (i.e. fatigue or over torqued), the tight side were supporting the pressure from the combustion chamber and causing the crankcase to support a momentum, not only traction force. Hope to be helpful.


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