Originally Posted by
grosbeak
While I was thinking about where to put my forward wing bolts, I checked the length of the bolt against the thickness of the wing at my first chosen position.
Nope, that's not going to work! I didn't find any 1/4"-20 nylon bolts longer than 2-1/2". Ergo, the location of the forward bolts has to change... so I put the dowels back in the fuselage, banded the wing on and marked holes in my new location.
If you look at how I did mine, the wood has been counterbored so the screws can work at the standard length. The blocks are glued with Hysol to the main spar in the wing top and bottom. The wood I used was hard maple. The maple goes all they way through the wing. I cut through the covering and sheeting with a #11 exacto and found the spar then opened up the hole to have a tight fit with the maple blocks. I cut the blocks to size before gluing, tracing the wing profile into the block and shaping with a dremel after crosscutting. Then drill and counterbore holes(9/32 and 7/16 drill bits). Then locate the mating blocks in the fuse, glue (again with Hysol), and "line" drill and tap from the holes in the wing. I later added the screws to the blocks in the fuse, just in case.
Looking as hpw you are doing yours, I don't see the load applied to the spar. Maybe I am just missing it.
Terry