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  1. #1

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    SIG something extra CG Point

    I have just built a something extra, and forgot to put on the tail. I intend to fly it as a tailess. My question is with a symetrical airfoil, where would you suggest I put the CG for the first flight? Also how much up aileron/elevator would be needed to counter the loss of tail lift?

  2. #2
    Moderator Deadeye's Avatar
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    RE: SIG something extra CG Point

    How can you fly it without tail feathers? My SSE balances about 1/2 inch behind the main spar, but it is set up for 3D.
    Randy Rossmiller, member, Golden Triangle Flyers
    Theres no such thing as too much power. Member, Club Saito
    Ultra Sport Brotherhood #52

  3. #3

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    RE: SIG something extra CG Point

    it wont happen. thats why orville and wilbur had a rudder. without a vert stabilizer. you just made a frisbee.

  4. #4

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    RE: SIG something extra CG Point

    I built a Bill Evans tailless once upon a time. Assuming you have a vertical stabilizer, I would start with about 1/8 up on the ailerons. It might fly, but the wing on mine was a lot different from a symmetrical wing. Odd leading edge and reflexed trailing edge. I don't remember where the CG was positioned. Really nice flying, but refused to do an outside loop. You'll need an elevator/aileron mix to fly without a stabilizer.


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