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Thread: Experemental versions of the AEIO 540

  1. #1

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    Experemental versions of the AEIO 540

    Are there companies that make experemental versions of the lycoming engine that cost significantly less.

  2. #2
    rwanttaja's Avatar
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    Quote Originally Posted by akmetal View Post
    Are there companies that make experemental versions of the lycoming engine that cost significantly less.
    There are companies out there that sell their own versions of the Lycoming 540 (Aero Sport, Mattituck, etc.), but finding one that produces the aerobatic version of it might be a bit of a stretch.....

    Ron Wanttaja

  3. #3

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    Are we talking about a parallel valve -540 or an angle valve engine? The parallel valve engines are lighter but more fragile in aerobatic use. Pitts fly with parallel valve -540's and Extras fly with angle valve -540's. They are not the same engine despite the "540" in their name. You have to look at what comes after the "dash" following "540".

    What makes any of the IO-540's an AEIO-540 is the crank with the heavier prop flange that does not have any lightening holes in it, and the installation of the fittings for the inverted oil system. And maybe the prop governor mounted on the front left side of the case rather than the rear. If I were to go looking to build up an aerobatic engine, I might start with a used -540 that has the right crank, add an aerobatic sump and cold air induction, and install the Christen fittings.

    So what do intend to do with the AEIO engine? As a weekend pleasure flyer you might not need an AEIO at all. As a competition pilot you will likely beat on the engine pretty hard and need all of the AEIO features.

    Best of luck,

    Wes

  4. #4

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    Quote Originally Posted by akmetal View Post
    Are there companies that make experemental versions of the lycoming engine that cost significantly less.
    Someone like Barrett or Aerosport will be able to build you an engine for less than a new one from Lycoming, but if you're looking for "factory new", there are no other options than Lycoming or one of its distributors.

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