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Riveted R-912 Counterbalance Rib

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After priming the R-912 counterbalance rib and R-913 counterbalance skin last night, I thought I would get those installed on the skeleton. First thing to do is check the plans for a rivet callout.

What!? No rivet callout? That means I have to think!

No rivet callout for the R-912 to R-902 spar attachment.

I grabbed the shortest AN470AD rivet I could find…AD4-4. That seemed to be good.

This one will work.

And an after picture. Wuhoo!

Successfully set rivets.

I squeezed these. I’m still not totally happy with my squeezers ability to squeeze AD4 rivets.

Not too shabby.

Then, I grabbed the counterbalance skin and clecoed it on. My squeezer is only a 3″ yoke, so I can’t reach any of these holes.

My squeezer isn't long enough to reach these holes, and the girlfriend is outside helping me with some deck chair refinishing, so no rivet gun tonight.

Another picture of those two clecoed on the skeleton.

It's nice outside, so I had the garage door open. Lot's of sunlight in the afternoons.

Finally, I got the left skin clecoed on to check for fit and complete any remaining edge-finishing required before riveting.

Left rudder skin to counterbalance skin holes.

To be determined: whether I should edge-roll the forward edge of the rudder skin where it overlaps the counterbalance skin.

It looks good now, but might pull up when I rivet. I think I'll edge roll this. "Avery? Please send me your edge roller tool. Thank you."

Two rivets set today. Half hour total.

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