Drilling the Spinner and Fitting the Gap Fillers
I got the 14 holes drilled through the spinner and into the aft bulkhead uneventfully. The front bulkhead holes were located using small, round molybdenum magnets that center over each other. The lower magnet is taped in its underlying bulkhead hole and the top magnet slides around on the spinner on a plastic washer lubricated with a little oil. The magnets great attraction centers them over each other. The washer is taped in position and the center marked. Then the washer is removed, and drilled with a small #40 drill in case I was off a little. The final screw hole will be #19. In all cases I was nearly exactly over the underlying bulkhead hole. Once enlarged to #30 the holes were all perfectly centered. I also started fitting my home-made spinner gap covers. I'm so glad I took the trouble to make new ones. The fit is very good and I should end up with nice, tight joints where they butt up against the spinner.
The forward spinner bulkhead is blind drilled. Small, round, and very strong molybdenum magnets are used to locate the hole. The top magnet is put in a plastic washer that centers over the bottom fixed magnet that's in the hole.
Fitting the spinner gap fillers that I made. They are working out well and have nice tight joints next to the spinner.
The plastic washer is fixed with tape and the magnet removed. Drilling though the center of the washer yields the hidden hole underneath. It ended up being quite accurate.
All the holes have been drilled in the spinner and underlying bulkheads, Nut plates will be added to the bulkheads and screws used to secure the spinner.
Author
This post is from Scott's RV-14 Build
