25th June 2008

Trim tab

Hours: 2.4 | Posted in Elevators

Finished drilling, dimpling, and etching the trim tab components. Ended up dimpling the hinges rather than countersinking–I goofed on the elevator and dimpled the rear spar, instead of countersinking. I tested the dimples with the excess length of the hinge, and didn’t see any problems at all; no deformation of the eyes, and it nested nicely with the other dimples. Only “problem” is that it may require a longer length rivet than the plans call out, but that’s not really a problem since I have a whole case full of rivets.

Also fabricated the foam ribs, a task made easy by taping tracings of the pattern onto the foam block, rough cutting with a hacksaw, then going to the lines with the disk sander. Masked the rib locations inside the skin so everything’s ready for primer. Will try to pick up some epoxy today, so if I can get things primed tonight, tomorrow’s session should make quick work of the assembly.

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