ORIGINAL: John Sohm
ORIGINAL: Minnreefer
Thanks guys, I will add some plywood on the outside. I should have done a few things different, I made the new plywood on the inside, but I should have made it a little longs, I was not really thinking. I cut it there, mainly because that is about where it broke and I did not want to redo the servos (lazy) It is basically built the same as when I got it, I just want to add a little more. I am worried about the wooden mounts breaking off again (all 4 broke off with the wing, and the wing just floated down gently, while I was trying to use the elevator to bring the wingless body up from it's dive )) )
Mody, I believe most of the planes that Greybeard (Gene) has are Kaos, or more ''vingtage'' pattern planes 1 might be a birdie.
Am I to understand that the wing just tore off the plane and floated down and that's what caused the crash and resulting damage? Because if that's the case, I think I would be more concerned with the method you used to attach the mounting blocks to start with. Those blocks should always be epoxied in place. Don't use CA because it has one of the weakest bonds of any adhesive in the shear direction. Wood working glue aka Aliphatic glue is strong but make sure there's a good fillet around the joint but I always use epoxy.
Your repair looks like it should be strong enough as is but I also agree with the thin plywood or even carbon fiber tape to reinforce the joint. We used to take a piece of 1/4'' ply about 1/2'' wide x 3'' long and glue a little handle to it. Then on the bottom opposite the handle, glue a strip of 60 or 80 grit sandpaper about 1/4'' to 3/8'' wide by the length of the base plus a little overlap to secure the sandpaper. Now, using a straight edge, run the little block along the straight edge to sand an indent in the balsa side until the base of the sander contacts the outer surface of the sheeting. You'll have an indent that is just the thickness of the sandpaper and at 60 to 80 grit, should be somewhere around 1/32'' if I'm not too far off. Mix up some 15 Minute epoxy and glue your plywood strengthener in the groove and you should be all set. Wipe off any excess with a little alcohol on a paper towel before the epoxy totally sets.
Hope this helps you out a bit.
ARF, he had never built a kit before. That makes the repair job even more impressive. I'm pretty sure using any glue at all is a big improovment. Doing a repair like this is also a great learning tool.