Did some marathon airplane building over the last three days, and Ellen and I managed to complete the left flap. First, I pulled the bottom skin off and riveted the ribs to it, bucking bar access is a lot better without the upper skin in place!
Next, I reassembled the flap without the spar. Ellen and I riveted the upper skin-to-rib and bottom skin overlap rivets. Access was tight, but the tungsten bucking bar made riveting relatively easy.
Ellen did the shooting, I bucked…
The next day I reinstalled the spar and pop-riveted the rib leading edge tabs. Nothing too tricky here, just need to gently push aside the flap leading egde to get the pop riveter in place. I used my cheapo riveter which I ground down to fit in tight spaces, worked fine.
After that, I solo-shot the upper skin-to-spar rivets and squeezed the rib-to-skin rivets – came out great!
Before squeezing the spar/skin/hinge rivets, I removed one eye from the center of each hinge. This is where the flap hinge pins will be inserted; I liked this idea better than drilling a hole in the inboard aileron bracket to facilitate inserting the hinge pin.
Don’t know why I didn’t get a shot of the completed left flap…but it looks just like the right one – so keep reading. One more thing… this flap came out with zero twist. Very cool!