txnbuilder
Active Member
I'm finishing up my trim tab, and just noticed the plans call out countersunk rivets in the trim tab bends. How exactly is one supposed to dimple these holes?
I actually didn't 'just' notice this now. Before I started, I read the part in the instructions where the bottom side of the trim tab spar has been riveted, but clecoes still hold the top edge, the spar, and the piano hinge. The manual talks about sighting down the elevator trailing edge and adjusting the tab for any twist. After this is done, THEN with everything in place and the trim tab 'de-twisted' you drill the holes on the sides and cleco them to keep the desired form. Of course, at this point, the spar is riveted to the bottom, and it's just about impossible to dimple these holes.
So, I will use a regular pop rivet (AD-41-ABS) and be done, but I'd still like to know if I'm somehow misreading the instructions?
Luis Orozco
RV7-A - Wings on their way (literally!)
I actually didn't 'just' notice this now. Before I started, I read the part in the instructions where the bottom side of the trim tab spar has been riveted, but clecoes still hold the top edge, the spar, and the piano hinge. The manual talks about sighting down the elevator trailing edge and adjusting the tab for any twist. After this is done, THEN with everything in place and the trim tab 'de-twisted' you drill the holes on the sides and cleco them to keep the desired form. Of course, at this point, the spar is riveted to the bottom, and it's just about impossible to dimple these holes.
So, I will use a regular pop rivet (AD-41-ABS) and be done, but I'd still like to know if I'm somehow misreading the instructions?
Luis Orozco
RV7-A - Wings on their way (literally!)