Brief Description: Countersinking the Trailing Edge
Tonight I used a countersink to prepare the trailing edge to receive the dimples of the rudder skin. You have to be very careful after countersinking one side that, when you do the second side, you don't enlarge the holes too much. Because the trailing edge wedge is triangular, the countersinks meet at one edge (the thin edge) while drilling. If you push a little too hard, that thin surface will easily be drilled too deep, enlarging the hole in the process. Luckily, I noticed this tendancy early on and made sure to "baby" the drill when getting close to the point of the bit walking on me, It took a while, but I am happy with how it came out.
General view down "the wedge."
The thin bit I was talking about is on the bottom edge of the hole in this picture.
