I put together a Reflection Biplane FlatOut, and I have everyting centered up, but the thing rolls imediatly on takeoff. I have the rimfire motor on it, and it did it both with a 2 cell LiPo and a 11x3.8 prop and a 3 cell LiPo with a 8x3.8 prop, same speed.

Do I have a problem if I sanded too much on the nose to mount the motor, or if I don't have the conecting rod for the Ailiorons just perfect?

Looking for any clue as to what would cause this. Thanks

The motor torque is most likely doing this, and there's no way around it. Try a hand toss with the motor already going. If it still does it bad then your ailerons are out of trim.

you could take the motor out then put a small washer or two on the farthest right bolt(if you looking at the plane from the front)to ry o give it some right thrust that might help and if it doesnt and it makes it worse then you can always take the washers off ...............

Had the exact same trouble, you have a bind in the ailerons. They have to be totally free or they won't cetner. I used a drill to ream out the hnges and pivots before I put them together.