Originally Posted by rvbuilder2002
You wont be crisping up dimples in .040 with your hand squeezer. A properly functioning pneumatic squeezer will form a dimple in .040 much better than you can by hand.
If you choose to dimple, a better process would be to lightly machine countersink after dimpling to make the dimple slighter deeper to receive the skin dimple.
True, even after hand squeezing the rivet head sits .007" below flush but it seems to flatten out the surrounding material a bit better, not quite sure why.
I guess I'm more concerned with the finish on the visible surface of the skins. I do plan on back riveting the top skins first and traditional bucking of the bottom skin rivets. I realize this is going to make bucking the aft spar more challenging since the flange faces forward into the wing but I want the topside to look as nice as possible. Seems like the depressions left from squeezing might show up more in the visible surface, if driving the rivets with a gun/bucking bar from the outside.