Elongated hole
Hi all. I was drilling one of the upper attach holes on the rear spar of the vertical stabilizer to 3/16". When I broke through the spar cap, the assembly walked up the drill, slightly elongating the hole on the forward side of the spar doubler. The hole is still round on the aft side on the spar cap where the AN3 bolt head will ultimately insert and rest. So it's only elongated slightly on the forward face of the VS rear spar assembly. The elongated side will end up in the middle of the sandwich when bolted to the tail cone.
I think a slight elongation will remain even after match drilling it to a #12, called for when attaching it to the completed tail cone assembly later.
So, continue on with the assembly of the VS, and live with a slightly elongated hole here?
Or can / should I go up to an AN4 in this location thus removing any elongation? I wasn't sure about edge distance where the rear bulkheads and flange on the aft deck all come together to receive the AN3 bolt from the rear spar of the vertical stabilizer.
I would be going from a AN3 3/16" to AN4 1/4" bolt which is 1/16" wider or only 1/32" closer to the edge of the tailcone assembly in that area.
(Post was edited with a better photo)
Hi all. I was drilling one of the upper attach holes on the rear spar of the vertical stabilizer to 3/16". When I broke through the spar cap, the assembly walked up the drill, slightly elongating the hole on the forward side of the spar doubler. The hole is still round on the aft side on the spar cap where the AN3 bolt head will ultimately insert and rest. So it's only elongated slightly on the forward face of the VS rear spar assembly. The elongated side will end up in the middle of the sandwich when bolted to the tail cone.
I think a slight elongation will remain even after match drilling it to a #12, called for when attaching it to the completed tail cone assembly later.
So, continue on with the assembly of the VS, and live with a slightly elongated hole here?
Or can / should I go up to an AN4 in this location thus removing any elongation? I wasn't sure about edge distance where the rear bulkheads and flange on the aft deck all come together to receive the AN3 bolt from the rear spar of the vertical stabilizer.
I would be going from a AN3 3/16" to AN4 1/4" bolt which is 1/16" wider or only 1/32" closer to the edge of the tailcone assembly in that area.
(Post was edited with a better photo)
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