Working on the left elevator and the manual calls for countersinking the elevator trim spar in order to receive the dimples from the skin. Question: Can one dimple the trim spar or is countersinking preferred?
Working on the left elevator and the manual calls for countersinking the elevator trim spar in order to receive the dimples from the skin. Question: Can one dimple the trim spar or is countersinking preferred?
You want to countersink the spar. The dimpled skin is the top layer, then it fits into the countersink. The third layer is the piano hinge which just get's drilled and the shop head of the rivet is against the hinge so you don't have to worry too much about how thin the spar is.