Just double-checking before I do something stupid. I'm on the first step of SB RV8 wings. The manual says to rivet the tank skin platenuts to the spar after countersinking. But the holes in the spar aren't up to size. I assume I'm supposed to drill them to #40 and debur the bottoms of the holes? (The tops will be countersunk.
I only ask because the plans go on at length about countersinking but don't say anything about drilling to size. I'm pretty sure I already know the answer, but the spar is so perfect I hate to take a drill to it.
Here's what I'm talking about:
I only ask because the plans go on at length about countersinking but don't say anything about drilling to size. I'm pretty sure I already know the answer, but the spar is so perfect I hate to take a drill to it.
Here's what I'm talking about: