I'm building a Pitts S1C from Steen Aero Lab Plans. I have just completed gluing the top wing spars together. The plans show a nailing strip, that conforms to the shape of the glue joint, locatedbetween the first two ribs on the top and bottom of each of the spars. The plans do not indicate what this nailing strip is made of. All the other nailing strips between the other ribs call for spruce. I assume that is what the center one should be also or possibly it should be plywood. Can anyone confirm this for me. The plans also say the front ones should be 1/4" thick and the rear ones to be 3/8" thick. Can anyone explain the reason for that. It would seem to me they should both be 1/4" thick so they would be even with the top of the rib capstrip on both spars. Then one last question. It appears the plywood covering over the top and bottom of the center section fits between the first two ribs. I think it should lay on top of the capstrip of the first two ribs so that it conforms to the airfoil shape.
Any help would be greatly appeciated.
Thanks in advance.
Matt
Any help would be greatly appeciated.
Thanks in advance.
Matt
