ORIGINAL: Montague

I calcualted 540sqin for the wing area, not bad, a bit small in my book but not terrible. When you did the airfoil templates, were they for 9'' and 6'', or were they for longer, and then cut down so you could add the aileron? Past experience seems to show that the wing often acts like what the chord would have been for a given thickness of the airfoil, even if the aileron stock makes it a bit longer or shorter.

In other words, take a 9'' template (LE to sharp TE), cut off the TE, add TE stock and aileron, and you might wind up with a wing chord of 8'' or 10''. But the plane will fly pretty much like it would with 9''. So I do most of my calculations based on the length of the airfoil templates rather than what's actually on the plane after wing building.

But I've digressed.

1/2'' forward or back will make a big differnece.

Your design does vary a bit from the Battle Axe, so you should calculate your own CG location rather than using the Axe.

Your wing is a constant taper and sweep.
So, your mean chord is 7.5'', or (6+9)/2.
So 27% of that is 2.025'', or 2'' in the real world.

So, your CG should be 2'' from the LE measured at HALF WAY out along the wing.

So, measure 30'' from the center on each side, then 2'' back from the LE, and connect those lines at the fuse, and there's your CG.