Clyde:

The wing looks like a typical tapered wing where the leading edge is swept back and the trailing edge is swept forward. Usually in these wings, the spar is straight across from tip to tip. If it is, then you can just measure 30% (of the root chord) back on the wing at the side of the fuselage and that will be your CG.

If the wing root chord is 16", that would put your CG at 4.8 inches (122mm).

The method I gave you in the last post will work fine for this wing and should give the same answer.

Looks like a nice flyer. Good luck with it.

Jim

PS: The airfoil looks pretty thin. I'd suggest you start out with very small elevator travel. Something like 1/2" each way on low rates. Use anything you want for high rates, but use low rates on the first flight! I have a Suchoi with an airfoil like that and it will stall instantly if the elevator throw goes over 1/2".

J