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I thought I was doing the right thing by using oops rivets to put on these nutplates. Everyone raves about how much easier it is to use them instead of dimpling the nutplates. When I heard about using them, I ASSumed that it was using the NAS1097AD4- rivets -- #30 hole. So I drilled all my holes to #30 and countersunk them so the AD4-'s fit nicely. Knowing that the nutplate holes were #40, I knew that I needed to enlarge them to #30 for this to work. No big deal right? Well, it didn't occur to me that these nutplates were steel. The first couple nutplate holes enlarged quite nicely to #30. Then like hitting a brick wall, my drill bit didn't make any progress to enlarge the hole. I tried 3 other bits with the same problem. Plan B really sucked. I ended up enlarging the hole to 7/16", then to 1/8" with a unibit then to a #30, then deburr the hole. What I should of done is pay closer attention to the fact that people were using a NAS1097AD3-? rivets. That makes a lot of sense now. Anyways, that took a while to figure out. I backriveted the nutplates on and everything turned out very nice in the end.  My dad and his pilot friend Paul came over today to check out the project. We had a nice time talking about the project and then I put them to work. I had them cleco on the ribs to the leading edge.  Then I showed the basics of riveting. We only did these four rivets on the LE.  I am very impressed with how nice of a fit the joiner has with the leading edge. 
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Last Modified: August 13, 2023 |