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Built the stand for riveting the flaps and got everything ready for riveting. Julie helped rivet the bottom of one flap.
Getting into the rear spar is tough. I ended up using the yoke from the squeezer, a tip I got from someone else’s site. It worked great. The plans don’t call out the rivets very well. I found that -3.5 rivets worked everywhere except where the two skins overlapped a rib. That needed a -4 rivet. On the end rib, I can’t figure out how to buck the rivet under the nut plate (arrow in pic). I read on someone’s site that they recommended attaching the nut plate after riveting the rib. Now I understand why. I’ll probably just use a blind rivet at that spot. I was able to buck all of the rivets where the rear spar intercepts a rib, except on the end rib (other arrow in pic). Again, the nut plate gets in the way. The plans call for a blind rivet there, so I’ll probably just do that.
Riveting the flaps is certainly not easy. It’s a tight squeeze for bucking, but it’s doable.