This session's goal was to prepare all of the ribs for the right wing to be painted with primer. I had to scuff all of the surfaces with a Scotch-Brite pad so that the paint would adhere to them. Then I mock assembled all of the ribs in their appropriate places on the main right spar with clecos, so that I could be sure the correct parts were all here since the multiple shapes of ribs can be easily mixed up. Then I numbered them to be sure their locations would now be permanent.
Two of the ribs have flap hinges mounted to them, so those have some additional match-drilling done to allow those brackets to be riveted to them. Most of the ribs also have two bolt holes that go through the main spar, and those holes had to be match-drilled by using the main spar as a jig. Finally those newly drilled holes all had to be deburred.
What's next? Time to prime these ribs, plus a few other rib brackets.