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Thread: ? Engine swap Rotax 100 for 80

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  1. #1
    Senior Member Slyfox's Avatar
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    felts field, spokane
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    Default Re: ? Engine swap Rotax 100 for 80

    If you want to get the most out of your 80 rotax on your model 4, put the prop that I have for sale on it and you will get up to that 110mph. I know, I had it on my 80 model 4 and it did move right along. I have the IVO patriot ultra light prop in excellant condition for 700 dollars, it's yours if you want it. You pay the shipping.

    I did switch to the rotax 100 and I might have gained 3mph on the top end, the biggest change is the take off. I ended up putting on the medium IVO that's why the old one is for sale. It's is a straight across switch out, no suprises. Same engine, just more juice.
    steve
    slyfox
    model IV 1200-flying
    912uls
    IVO medium in-flight
    RV7A-flying
    IO-360
    constant speed prop

  2. #2

    Join Date
    Nov 2009
    Location
    Durango, Colo
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    31

    Default Re: ? Engine swap Rotax 100 for 80

    Hi Steve
    And thanks for the info on the engine swap. And the prop. The plane I have been talking about, has the long wing, so I woud expect it to be a little slower than your Speedster.
    And I would think that the prop may be considered a cruise prop, so you pay a penalty on t/o performance.
    Usuall everything is some kind of trade off.

    Gary

  3. #3
    Senior Member Slyfox's Avatar
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    felts field, spokane
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    Default Re: ? Engine swap Rotax 100 for 80

    Quote Originally Posted by shortfielder View Post
    Hi Steve
    And thanks for the info on the engine swap. And the prop. The plane I have been talking about, has the long wing, so I woud expect it to be a little slower than your Speedster.
    And I would think that the prop may be considered a cruise prop, so you pay a penalty on t/o performance.
    Usuall everything is some kind of trade off.

    Gary
    THe prop is an inflight adjustable, so it is both cruise and take off prop. I originally had the long wing on my aircraft and when I shortened the wings I didn't notice too much gain on cruise with the short wing. I've had the plane for 5 years and about 1300 hrs now.
    steve
    slyfox
    model IV 1200-flying
    912uls
    IVO medium in-flight
    RV7A-flying
    IO-360
    constant speed prop

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