Well, nothing too exciting, except I got to bang* on some rivets.
* By “bang” I mean “squeeze.”
After the other night, I have 7 z-brackets that are matchdrilled to the spar. Six of those seven need nutplates on them.
I grabbed a cleco, a (sacrifical) nutplate, an AN3-4A bolt, and a handful of washers (so I don’t engage the locking portion of the nutplate).
Bolt with washers goes in the hole, nutplate on top, hand tighten in a reasonably aligned orientation, and drill one of the holes for the nutplate ears through the angle.
Then, add a cleco and drill the other side.
Easy as PIE.
After completing the first three sets, I snapped this picture.
I think it was…[thinking]…6 angles, three bolts each, 2 holes for each bolt…36 holes?.
After all was said and done, the sacrifical nutplate had been thoroughly abused.
I deburred the holes that won’t be countersunk, and moved on to countersinking. I thought about using oops rivets, but since this material is so thick, I went ahead and countersunk for a full-depth AN426AD3-4 rivet.
Guess what I found when I picked up my countersink cage?
IT WAS ALREADY SET FOR THE PROPER DEPTH! WUHOOOOO!
(It’s the little things in life that really matter.)
Anyway, here’s one hole done.
While I was countersinking, I went ahead and did the FRONT side of the spar, too. (The nutplates go on the back of the spar, the bolts for the inboard z-brackets are fed in from the front.)
Then, back to the z-brackets for some riveting.
Then, onto the rest. All clecoed up, ready for rivets (in the background).
Then, after setting 36 rivets, I set them all back up on the spar. No bolts yet, though. I’ll save that for tomorrow.
It’s late, and I need to get inside to bed.
But first, I grabbed all the tank parts for the right tank and quickly mocked them up with no clecos in my cradles. That’s the baffle leaning up against the cradles in the foreground.
It was just over an hour, but not quite an hour and a half. I think I rounded down last time, so this time, I’m going to call it an hour and a half.
Oh, and I almost forgot, I had to drill one rivet out. Just plain old messed it up.
Until next time…