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SIG something extra CG Point

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Old 04-17-2009, 10:59 AM
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navydon
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Default 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?
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Old 04-20-2009, 09:06 AM
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Deadeye
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Default 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.
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Old 11-13-2012, 09:43 PM
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Default 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.
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Old 11-14-2012, 03:55 AM
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Default 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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