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  1. #1

    Join Date
    Apr 2008
    Borger, TX
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    engine power loss

    A few weeks ago I was flying my Escapade with an O.S. 46 max AX, and in flight the engine power dropped to nearly idle while performing a roll. I got it to the ground and checked the clunk, fuel line, and throttle connections and found nothing wrong. I fueled it up and checked the engine at the vertical with the engine at full power. Again no problems, so I tool off again. It flew fine in rolls and loops, but then, at straight and level with full power, the engine cut to almost idle again. Moving the throttle had no affect on the power. I found it odd that the power was cut so drastically, but did not die. Also, there were no problems at all on the first flight of the day. Does anyone know what could have caused this?

  2. #2

    Join Date
    Jul 2002
    Brockton, MA

    RE: engine power loss

    I'd check for engine overheating (was the needle set a few clicks rich on the ground??) and if you have to pull the tank, is there a split or cut in any of the fuel tubing (hard brass tubing or the flexible tubing) that might be letting air in.

    Just my $.02

    Club Saito #61 - Cub Brotherhood #107
    Spitfire Brotherhood #143 - Kadet Brotherhood #3
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  3. #3
    Join Date
    Apr 2002
    Champaign, IL

    RE: engine power loss

    Please, this is not a discussion forum. Only the OS reps are permitted to reply.

    That being said, it does sound like you're getting overheating. Overheating is caused by a too-lean needle setting, trash obstructing good fuel flow, fuel with a too-low oil content, too little cooling air, too much load that "lugs" the engine, and so on. Check everything very carefully.

    When an engine quits due to a particular attitude of the aircraft, you have a fuel system problem. It must be thoroughly checked out.
    Bill Baxter, Manager Hobby Services/Futaba Service/North America
    3002 N. Apollo Dr. Ste. 1 Champaign, IL 61822 USA
    Service Phone: 217 398-0007

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