Bayou Bert
Well Known Member
Hi ya'll, my progress is frozen in fear.
I am to the point of counter sinking the HS spars on the 9A emp.
I have looked at old threads. I have played with test pieces of
dimpled skin and counter sunk holes.
Van's says:
If there is going to be a dimpled skin riveted onto the machine countersunk surface, adjust the machine countersink tool a few
?clicks? deeper than flush. This will make the rivet/screw sit about .005? below flush when dropped into the hole.
I have flushed the rivets and then couple of clicked and measured with
vernier calibers and .005 is almost nothing.
It might just be my not knowing, but when I put the test dimpled piece
in the hole....it just seems like it will spin in the hole a lot easier than
in a hole a few, .008-.009, thou deeper. The deeper CS just feels like
a better fit.
I assume when together the bottom of the dimple and the bottom of the
CS should almost touch?
If there is something else someone can direct me to go read or see,
it would be mightily appreciated.
I am to the point of counter sinking the HS spars on the 9A emp.
I have looked at old threads. I have played with test pieces of
dimpled skin and counter sunk holes.
Van's says:
If there is going to be a dimpled skin riveted onto the machine countersunk surface, adjust the machine countersink tool a few
?clicks? deeper than flush. This will make the rivet/screw sit about .005? below flush when dropped into the hole.
I have flushed the rivets and then couple of clicked and measured with
vernier calibers and .005 is almost nothing.
It might just be my not knowing, but when I put the test dimpled piece
in the hole....it just seems like it will spin in the hole a lot easier than
in a hole a few, .008-.009, thou deeper. The deeper CS just feels like
a better fit.
I assume when together the bottom of the dimple and the bottom of the
CS should almost touch?
If there is something else someone can direct me to go read or see,
it would be mightily appreciated.