Thanks for the info on spar wood guys. For those interested, I do need a center spar length that is 2 feet longer than normal. The 18% chord AS airfoil will improve the strength and load bearing necessary for my project. The Taller spar is about 20% stronger than the stock spar which will be necessary because the airplane I am designing is about 250 lbs heavier than my 2S. Instead of foam/glass on the center stub wings I am probably going to be using wood ribs and ply on the surfaces. It will be comperable in weight but stronger. The ribs may also be made out of Nomex - a carbon honeycomb material that is extremely strong and light. Many ideas but they are still on the drawing board. This will be custom built and a true experiment. More info to be coming......
Bill and 41768