RV14 Build July 20
Horizontal Stabilizer
So a quick reminder of what I did here. Basically the front and rear spar have an up and down and I flipped 1 of them, Im choosing to say that I flipped the front one. I thought I had 3 different ways to fix it, but the rear spar support bars run at an angle, so the spar is not symmetrical and the rear down has to be the down, and this knocks out one of my potential fixes.
What my plan is now. Relocate the mounting holes for the front spar and drill them exactly. I measured the hole edge to the bottom of the spar, then measured the whole spar. I figure what Im trying to do is mirror the hole location so I took the distance of the bottom edge hole to lower edge of the spar and added the radius to it, this gave me the distance from the center of the hole to the bottom edge. In theory since the holes are going to be mirrored its the same distance from the top edge to the center of the whole I want to drill. So if i double that distance and subtract it from the total spar width I would be left with the distance from the center of 1 hole to the center of the other, then I added the radius again and that should be the distance from the top of the hole I have to the center of the one i need to drill. I cross checked that location with edge of hole to bottom of spar distance mirrored on the top and everything was in the same place. So i feel comfortable I found it vertically. Luckily for me there is a rivet line and the edge of the rivets corresponds to the center of the hole I want to drill so locating the hole horizontally was a little easier. Drill the 1 hole and then use the bulkhead as a template for the second hole by match drilling.
As I was writing this I had another idea, buy the doubler cut it to size flips its orientation so up is down and use the 4 vertical stabilizer bolts holes to mount the doubler to the spar and then use the holes in the double to locate the holes in the spar and match drill!! Way easier.
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