Hello, I have been traveling and unable to respond with proper information. I must say I was worried about the comment about the oversized hole. I am glad when I got home I was able to do some research and take some measurements.
Yes, that hole does look larger than it should be. I do not know why. That rivet, has been set and I cannot go back now and re-measure. But, I can use any parts that have not been assembled yet to check my work and recheck my dies. I use Cleaveland Tool dies, but I do have other sets as well.
I know I dimpled all those bulkheads and J-Stiffeners at one sitting with one set of dies in the pneumatic squeezer. I know when dimpling the J-stiffeners and bulkheads and anything with a flange, I used the small diameter dimple die. The only small diameter die I have is a -3 from Cleaveland. I use the small diameter die to make sure the outer edge of the die does not fall over the bend in the flange and deform the part. (I did that once on my sample airfoils)
So I went and measured the dimples of those parts on the pieces that I have not assembled yet. The upper skin J-Stiffeners, the bellcrank ribs etc. All the dimples conform to the measurements in the below pictures and thread links at 0.103 or 0.104. (Not the larger substructure hole diameters). Nothing larger. Does this meet the mil-spec listed, no, but the mil- spec does not cover dimpled holes, only countersunk holes for 426 rivets. This forum has many threads on this topic. I copied one with pictures into this post. My holes that have not been dimpled, the longeron holes, have a nice tight rivet fit as per MIL-Spec.
I then took all my -3 dimple dies and proceeded to make test runs in all various combinations to see if maybe, one was mis-marked or larger than it should be. They we all OK. To quote
Warner Wolf (NY Sports Broacaster), lets go to the video Tape. I went and viewed my dimpling and confirmed that all J-Stiffeners were dimpled using the same pneumatic squeezer and dies at one sitting.
(1-24-2016)
http://i601.photobucket.com/albums/t...B99C6EB99B.jpg
Thread
http://www.vansairforce.com/communit...imple+diameter
I believe I am OK and that picture is deceptively showing an excess amount of gap. I will review all those rivets later tonight.
__________________
Michael
Builders Blog
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RV-10 Builder
Tail Kit delivered 6-2013
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