Tonight I’m continuing where I left off in my last work session. I’m working on the horizontal stabilizer rear spar to tip rib stiffener angles.
I began by center punching and drilling pilot holes for the rivets. 
Once the angle had the pilot holes drilled, I clamped it in place so I could match drill the angle to the spar and tip rib.It’s sort of hard to see but I put a piece of scrap 0.025″ aluminum under the angle to help provide space between the HS skin and the angle.
Here is another shot of the clamped bracket, viewed from the front side.
Using a 12″ long drill bit, I match-drilled the holes in the side of the angle with the tip rib. Drilling aft through the side of the angle that is drilled to the rear spar is more difficult to do, so I’m going to wait until I remove the skins and can stand the HS frame up, remove the forward spar and then drill these last few holes.
Viewed top down.
Please comment, I love to hear from my readers. Thanks again for coming along for this ride, you make my work worthwhile.
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