Built from Dave Fritzke plans. 22 oz. Powered by Emax 1600 kv outrunner -124 watts with 6-3 folder. Very!!! roll sensitive. Only 1/8" aileron deflection-this was at the low end of recomended throws. CG seemed correct. May try to fly nose heavy to decrease sensitivity.

I don't think making it nose heavy will decrease the roll. You may want to get a radio with Expo to help tame the roll.

Talking to myself-it was the CG stupid. Rechecked CG-it was tail heavy

As mentioned by soarrich the CG location has zero to do with the aileron roll sensitivity. If it's too sensitive that is because you're flying it very fast or you have too much aileron still. The CG location will only have some influence on the elevator response.

Having flown a few small fast models I found that at high speeds it takes very little control deflection on any surface to get a strong reaction. But you still want enough for when gliding in slowly to retain a reasonably strong control response. The solution is to either use dual rates to set the controls up for the two extremes or to just get used to barely breathing on the sticks at high speed.

This is where design could be beneficial. The size and position of the ailerons can give them a more consistent response through the speed range. Look at some Q-500 pylon racers. The barn door aileron set mid span but with a wider chord allows you to almost eliminate the use of dual rates. Full span strip ailerons could be the issue here. Honestly with a plane like this, You will just have to get the throws down and live with it, if you do not have expo. The other aileron configurations should be considered on the next project maybe.

Back when- the trick was to use just one aileron -after all, it's "go fast -turn left" also a slight forward CG was a must for rock solid directional control

VG, you raise a good point. Even if the Pacer in this case uses strip ailerons some reduction in response could be gained by cutting away the outer 2 to 3 inches of the strip and securing it solidly to the wing. That would produce a part of the wing out at the tips that tends to resist the aileron action by damping some of the rolling action.

But at the same time the Pacer is intended as an aerobatic model. So why someone would want to do anything to reduce the roll rate is a mystery to me On a racer then sure. But the Pacer isn't a racer. It's easier to just learn to use very small stick movements at high speed so you maintain the slower speed control response you want.

Thanks everyone for your help. Tried exponential which did reduce reduce roll sensitivity.Pacer went into a spin and crashed.
Pacer is beyond my skill level.Plan to get back flying my 1969 New Era 1 which I can handle pretty well.