Wingspan is 34", it is 8" at the root and 4 1/2" at the tips. It has a straight leading edge. The foamboard that is glued to the top and bottom of the Coroplast wing is 2 1/4" wide, this gives you the KF airfoil. There is no spar in this plane. If you cut the wing with the splines of the coroplast running fore and aft along with the foamboard running spanwise it is plenty stiff enough to do the job. The stabilator is 7" from the trailing edge. The stabilator measures 10" by 1 1'2". I made the boom longer than I knew it needed to be and with the engine, wheels, and bellcrank installed I would slide it in to check the balance. I cut off short sections of the boom a little at a time until it balanced just a hair nose down. I guessed the CG at about %25 from the LE. Then I glued the boom in place. It worked out well, no additional weight was needed up front or in back. Using the Norvel Tank and mount really gets the engine out there so if you were to use a Cox engine I'm sure the boom would have to shortened considerably to get it to balance correctly.