Folks,
I'm designing a 2 piece wing that will use 2 wing tubes to join each panel. The main tube at the high point of the airfoil and a rear tube typical where a rear spar would be located. Anyway, is there a online calculator that would help with the sizing of these? It is going to be a rather large model that will weight @ 35 pounds at takeoff and have @ 1900 square inches of wing area in a 90" wing span. Airfoil will be almost symmetrical at 14% thickness. 27.7" root and 16.4" tip cord. The wing will then bolt to the fuse. I want 15g's minimum load factor or 535 pounds. 20g's would be better at 700 pounds load.

A 2" diameter aluminum tube front and a 1 1/4" tube for the rear one? Remember it will take all the stress right at the centerline.

Anyone out here that can help?
Thank you!

Dave