Polar
Active Member
As I work away on my empennage I keep wondering why I'm bothering to final drill the #40 holes on the skins? So far all the holes in the flanges and skins have lined up perfectly. I can understand final drilling the AN470 holes, but for a AN426 the dimple die oversizes the hole slightly regardless of whether or not I've ran a #40 drill bit through it.
There must be a reason, but it isn't apparent to me.
There must be a reason, but it isn't apparent to me.