Quote:
Originally Posted by R. Daniels
A dimpled piece of aluminum is a different dimension than a rivet.
|
Im working on some counter sinking myself at moment. A different part of the plane but none the less countersinking that must accept a dimpled piece
I would normally agree with what you saying above but section 5 does specifically state .007 deeper then flush for a dimple into a countersink. This is easily found using the end of a dial micrometer or now a days more likely a digital one.
What says the group on discretion here? I have been going with nearly exactly .007 but you do notice the CS does not always allow the parts to sit flush.
So the question is do you go further to get them flush or stick with what vans says?
Also more to the topic, i have an additional question on this. If you are CS past the pilot obviously the cutter is producing a larger hole then the original pilot. Is the problem here the fact that the hole is larger or simply the fact that it is not perfectly round? The hole being larger i would expect. The center hole in the OP picture that is not perfectly round is where the center of the nut plate goes on this part correct? So is the primary concern with the hole being elongated, you loose the ability to locate the nut plate or is it a strength concern?
Please excuse my ignorance as I'm not at this stage in my build but very interested in learning about this for the future.