Q-500 Racing Discuss AMA 428, AMA 424, and any other variants of Quickie 500 racing

Q500 CG

Old 08-14-2004, 08:20 PM
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Default Q500 CG

I bought a used Q500 and don't know where to try the CG. It's a low wing with a V tail. What % of the cord is a good place to try on the 1st flight.
Old 08-14-2004, 08:35 PM
Ed Smith
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Default RE: Q500 CG

If the model is a legal Q500 the wing chord will measure somewhere about 9 1/2 t0 10 inches. If you gave never flown one of these before I would suggest setting the balance point at 2 1/2 from the LE. Adjust to suit as you fly it more.

I set mine at 3" from the LE. Now this is on the tail heavy side of the balance point. But this is my own airplane and I have flown a lot of them. By playing around with the balance point, far more can be achieved during the trimming process than altering Control surface throws/trims. It does however require a lot of trim flights and the capability of moving the stuff inside the fuselage (Tank and Battery) around.

Ed S
Old 08-14-2004, 10:12 PM
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Default RE: Q500 CG

It kinda depends on the airfoil used, but Ed gives good advise. You will be safe in the 2 1/2" - 2 5/8" range.

Do you know the name of the Q500 kit? We could give you better advice if we knew that.

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