The manual for this AT6 calls for 3.5 to 4 inches from the leading edge to the CG. This plane snaps on landings unless I burn it in. Since we have a short runway I built in flaps and barn door ailerons. That did not help. I have now stripped the wing and built in 3 degrees of washout. It is about ready to go and so I wanted to be sure about the correct CG.

Now I am confused! My calculations show the CG to be only 2.5 from the leading edge. So to be sure I drew the wing on graph paper and it also shows 2.5. This figure is 25 percent of the MAC. One panel of the wing is 29 inches span. The root rib is 10.5. And the tip rib is 7.5. There is a leading edge sweep of about 3 inches.

I would love to have somebody else calculate the MAC and CG to either agree or disagree with my calcs.

Thanks, Arno