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Mark's Vans RV7
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Date:  4-18-2018
Number of Hours:  16.00
Manual Reference:  
Brief Description:  mated the wings to fuselage

We spent the last two days leveling, checking and re-checking the sweep and incidence before drilling the aft spar for the 5/16" bolt. I made four 1 1/4" by 1 1/4" blocks out of hard wood to keep the 12" long bits square to the surface of the aft spar fork. I started by drilling a 1/8" hole almost all the way through the aft spar fork. Then I added the drill block with the bit inserted and clamped it tight with a C clamp. Then, I drilled through all the material. Next I stepped it up to a 3/16, then 1/4 and finally 5/16. With all the drilling complete I reamed the hole with a .311 reamer for a smooth precise fit. I ended up with plenty of edge distance all the way around.
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