by thomas » Tue Nov 20, 2018 9:44 pm
See photo. It's the steel drill guide that comes with the B model for pilot drilling the spars for the 1/2" wing bolts.
A word of caution as I've already used mine. My drill guide was delivered with a .502" outside diameter, which is reasonably sized for someone drilling the wings with a standard 1/2" drill bit. However, my 1/2" wing bolts are really .498" in diameter. This means there would have been 4 thousands slop between the wing bolts and the spar holes. This may be acceptable for some builders but I wanted a snugger fit.
I used a reamer to get a precise .500" hole so I also had to turn down the drill guide to .500" diameter to fit in the holes I reamed. That's still more slop than I would like with my .498" wing bolts so I may replace the bolts with precision bolts or pins.
Paul
- Attachments
-