ORIGINAL: Jester241
Ya know,I'm glad you mentioned that about the wing tab bulk head thing. Now that I think of it,thats exactly how mine is and it would be a good idea to strengthen that area as well. I know the cowl mounting block system is a waste too. Had to fix that after the first flight. Flew it quite a bit today and it flew awesome though,but I still am going to stengthen that bulkhead just in case. Thanks
When I first encountered the wing/bulkhead connection loosening (the 1st Sukhoi's 2nd flight), I doubled the bulkhead. Next time out, the two layer tab started failing against the now strong enough bulkhead slot. So I sandwiched the two layer tab with layers of ply on either side. That worked.
With the second one, as I was putting the sucker together, I simply did both jobs right up front. It's still flying and shown no looseness.
I used AeroPly for the doubling. It's 5 plies of equal thickness wood. Think I used 1/8" behind the bulkhead and 1/16" each side of the tabs.