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Old 04-19-2021, 01:02 PM
Jslow2 Jslow2 is offline
Join Date: Dec 2020
Location: Cement City
Posts: 56
Default HS inner ribs

For the life of me I cannot get the three rivets that go through the nose and main rib and through the spar to buck. Any pointers?
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Old 04-19-2021, 02:09 PM
GeoffP's Avatar
GeoffP GeoffP is offline
Join Date: Sep 2018
Location: NSW, Australia
Posts: 195

Have you got photos or a snapshot of the relevant drawing to show exactly which ones?

If they're the ones I'm thinking, you mean the two inner nose ribs that are canted in at a bit of an angle to match the skin? From memory these were really hard to fit in place and buck as I think there's 3 or 4 pieces stacked up here to rivet, and the angle makes it hard to get a clean shot with the rivet gun. Also made it impossible to get a squeezer onto it as I recall.

You'll need to use an offset rivet set, and a thin bucking bar (like the tungsten one with an angle on one end). I often found it was helpful when setting -4 rivets in big stack-ups to use a 1/8" punch in an adjacent hole and wiggle everything around so the rivet I was trying to set would go in nicely. I also found it was good to try to actually get all the rivets into the holes before bucking the first one just in case things move a little and the subsequent rivets become a problem.

Keep at it, I just checked photos of my build and those particular rivets look good in the photos so I must've somehow got them in and bucked OK.
RV-9, Empennage and Wings about done, Fuselage started.
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Old 04-19-2021, 02:19 PM
Jslow2 Jslow2 is offline
Join Date: Dec 2020
Location: Cement City
Posts: 56

I think I got them thanks, what a pain!

I think it made it worse knowing that I squeezed the other side before putting them in the skin and it was way easier. I don't know why the instructions don't have you install them when you install the two ribs into the spar before putting the spar into the skin.
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