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Thread: Ultralight Engine Options

  1. #31
    zaitcev's Avatar
    Join Date
    Jan 2013
    Posts
    75
    On the topic of ultralight engines, Jim Wiebe posted a panegiric to Polini:
    http://jameswiebe.wordpress.com/2014...e-ever-except/

  2. #32

    Join Date
    Jul 2014
    Location
    dover tn
    Posts
    52
    Polini looks like a nice power plant to me .

    but just go back and listen to the engine note, on the wankle 313 cc on the +KID+ airframe .

    compared to this polini



    id like to try these radials out ,,
    sure would like to see images of it running , power out put seems low but the 3-cycl cool factor makes up for that

    http://www.compactradialengines.com/mz430.html

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    or this 4 cyl radial ..

    http://www.compactradialengines.com/mz570.html

    i think the fuel burn is high on them though iaw the specs .

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    the 3 cyl in operation



    Last edited by mrbarry; 10-21-2014 at 02:41 AM.

  3. #33

    Join Date
    Jan 2012
    Posts
    302
    Quote Originally Posted by mrbarry View Post
    no , its just the weight limits, by the time one builds a good strong wing , has an adequate crash cage and hangs on 5--60+ lbs of engine there is not a lot of weight left for faring..
    skypup is cute https://groups.yahoo.com/neo/groups/Skypup-club/info

    here is an example for the well heeled ,

    http://windward-performance.com/spar...pecifications/

    +5 /-4 , l/d 37/1 Vne 123 knts ,Empty Weight – 155 lbs

    i have seen motor glider tests with this airframe & a Hirth F33 [45 lbs w redrive & electric start]
    it is all kevlar and carbon fiber.. fixed engine pylon .
    Windward Sparrowhawk motorglider does not make the FAR-103 powered stall speed limit. FAR 103 has no stall speed limit for gliders.

    Konig type radial engines, three or four cylinder, are not something Leon (Compact Radial Engines) wants to sell. Costs and tooling are complications. Per many year old conversations.
    Last edited by jedi; 10-31-2014 at 09:02 PM.

  4. #34
    I like the look of these engines. http://www.simoniniusa.com/

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