Assemble
3/25/23 - 1.4h
3/26/23 - 4.2h
3/27/23 - 1.3h
The nose ribs and main ribs are riveted to the spar to form the flap skeleton. I started with the nose ribs, which were mostly accessible with the pneumatic squeezer. The main ribs were also mostly accessible with the pneumatic squeezer. The exceptions were the second main rib from the inboard edge and the outboard nose rib/main rib combo. The second main rib flanges face the nose rib flanges, which obstructs squeezer access, and the squeezer is too large to fit in the inset area of the end nose or main ribs. I bucked the rivets with a double-offset cupped set on the rivet gun with good results. The trickiest part of the operation is figuring out how to secure the parts to the work bench prior to riveting. I clamped some 1x2's to the work bench with the ends extended about 6” past the edge of the work bench. That provided a stable surface, which allowed access above and below the parts for the squeezer and rivet gun.

The final task on this sheet was to cleco the nose and top skins in place. The nose skin takes some maneuvering to get in position, but it eventually fit really well. I was also very pleased with how well the rivet holes in the skins and flap skeleton parts lined up. Clecoing everything together was easy for both flaps!
[Pneumatic Squeezer, 1/8 Cupped Squeezer Set, 3x Rivet Gun, Double-Offset Cupped Set, Tungsten Bucking Bar]