Yet more countersinking, rib fluting.
I finished drilling the last row of nutplate holes and then worked on countersinking the rivet holes. The only holes remaining that require CS are the larger hole for the #8 screw/dimple. I’ve held off on doing those so I can use them pilot hole as a guide for back-drilling the new skin.

I also started fluting the fuel tank ribs. This task has become my new ‘most hated task’. The wing ribs are easy to flute since they are straight. The fuel tank ribs are curved and severely out of shape due to the stamping process making them very difficult to flute. I posted a message to the RV-9A Yahoo Group to see if I can get any tips on this.

(Time: 6 hours)
- posted by Matthew @ 8/30/2003 07:41:50 AM