How do you make/use wing joining tubes in wings with dihedryl. (I will need to take the wing apart for travel) I am trying to see if I can make foam core wings. I have to date only had 1 piece wings.
Jonathan

Some of the RTF trainers have a solid metal bar, with the dihedral angle, as a wing joiner. Slide the wings together and out on some tape to seal the gap. The SIG Rascal 110 has a two piece wing, with flat bar metal joiners. It may not have dihedral but the concept is the same.

With the right construction to make a strong pocket for the joiner, you should be able to make it work in a foam wing.

Carrel has it right... the joiner will be a straight grain hardwood or aluminum spar with a dihedral angle. If you're building the wing, the joining spar will be the width of the wing spars. The wing spars will have plywood spar web bracing both sides to form a pocket to receive the dihedral spar. If I were attempting this on foam wings, I'd dato the wings for spruce spars and then cut out the joining area to the width of the spar plus the plywood spar webbing. Doing it this way, the foam wing certainly would not have to be solid sheeted. Do normal leading edge sheeting back to the spars and then cap strips to trailing edge.

Would I use the same technique if I were to use wing tubes(so I could take the wing apart)?
Thanks
Jonnyh

The point that Carrel made and I agree with is that if dihedral is involved, a tube wouldn't be used. Instead, the joining spar would be a solid hardwood or flat aluminum spar with the dihedral angle machined. For a sixty size plane it might be 8-10 inches long.

Here is a quick pic to illustrate.

http://pages.suddenlink.net/arlyn/airplanes/joiner.JPG