Wing Skin...how many dimples for CS4-4 flush rivets

Page 17-02, step 2 says "Dimple the W1201-L Inbd Wing Skin in 'two places'..."

It appears to me that it must be dimpled in "84 places", which correlates to the 84 countersunk holes in the edges of the stub spar. This would alow the proper seating of the CS4-4 flush rivets.

I am thinking that it would be impossible to dimple all these holes with a 3inch rivet squeezer. On the other hand, if I dont dimple them, then would the rivets automatic dimple the skin, and if so, why dimple the 2 that the instructions refer to?

"To dimple, or not to dimple, that is the question."

Any thoughts?

Dimples

I think most of the holes are already dimpled. Just need to dimple 3 holes total in 2 places. Jerry G talks about this somewhere.

MRT890

oops!...hadn't thought of that

mrt890 said:

I think most of the holes are already dimpled. Just need to dimple 3 holes total in 2 places. Jerry G talks about this somewhere.

MRT890

Click to expand...

I had not thought to check the skins, but you are right. I dug the skins out of the "pile of parts" and found that they were already dimpled except for a couple that we have to do.

Thank you for the quick reply!!