So I'm just starting my wings and the first thing is to countersink these nut plates on the spars. My question is about the countersink depth. I can't seem to find a straight answer anywhere.
Vans countersink method is flush plus 7 clicks. If I do that, the #8 dimples are nowhere near flush. I saw some really old posts from the early 2000's that said the countersinks should be .365-.375. That seems to work, but the countersinks are huge and knife edged.
What have others done for depth?
Here are some pics I took of a practice piece.
https://photos.app.goo.gl/NffkJ2j5Pzhvnv4p7
https://photos.app.goo.gl/RF4yDs3SkxM7dzYp9
Vans countersink method is flush plus 7 clicks. If I do that, the #8 dimples are nowhere near flush. I saw some really old posts from the early 2000's that said the countersinks should be .365-.375. That seems to work, but the countersinks are huge and knife edged.
What have others done for depth?
Here are some pics I took of a practice piece.
https://photos.app.goo.gl/NffkJ2j5Pzhvnv4p7
https://photos.app.goo.gl/RF4yDs3SkxM7dzYp9