Grant, You just misunderstood Jan, those were Metric G's....

Tomcat,

On two wings that I did, I used a 1/4" carbon fiber arrow shaft fitted into carboard tubes for reinforcement. Since you say you want a two piece wing, fiberglassing the joint is not a solution. I drill a hole big enough for the cardboard tube in each rib going out to 3rd rib, then I cut pieces of 1/4" balsa sheet about 1" square (assuming rib is large enough for that) and drill them to receive the tubes. Then slide the tube through the ribs with one 1/4" reinforcement square per rib and epoxy it all in. Once you get each wing half fitted like that, put a pin or wire through the tubes at the end so the CF tube can't slide out the ends and cut the CF tube to fit (or not, I left mine stock length and just left some extra cardboard tube past the third rib) then you can join the wings together using the CF tube as the strength member. I did the same thing but only out to second rib on the back of the wing to keep them aligned.

This requires careful work to liine up if the wings are going to have dihedral, but if you get the hole in the rib pretty close and cut it a little large, you can use the 1/4" block to carry the load and just epoxy it well to the rib to transfer the load to the wing structure. I've been happy with the strength and its not too much weight. I don't Pylon race, but I do some high stress maneuvers and never had a problem.

PS, the CF arrow tubes are available from Academy, hunting stores, Walmart sometimes, etc. They also make great leading edges for thin wings.

Duke