Z Brackets, Nutplates and Stiffeners

Time: 7 Hours

Today started with a couple of hours of deburring and edge finishing on all the fuel tank z brackets. I then hit them all with a scotch-brite pad and cleaned them with some denatured alcohol. I relabeled them with a sharpie and covered the flange that will go up against the fuel tank baffle with blue tape. This is the only surface that I don’t want to prime so that it can be ProSealed. Then they went to the paint table to get primed.

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20140118-212827.jpgAs the brackets were drying I started work on the 3 nutplates that get riveted to the main spar for the inboard most z bracket. The nutplates go on the aft side of the spar and need countersinks on the forward side of the spar so the rivets sit flush. I set up the countersink cage with my #40 bit and drilled them after I reamed the holes.

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20140118-210640.jpgThe only way I could rivet the nutplates was with my gun and bucking bar, and it was tight with the spar doubler plate.

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20140118-210856.jpgNext up was to fabricate the fuel tank stiffeners that go on the bottom of the inside of the tanks. Van’s sends them in a long piece with notches in them to guide you on their shape.

20140118-211313.jpgI rough cut them with the snips and bandsaw.

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20140118-211554.jpgI then shaped all the corners and debured all the edges and organized them. The brackets were also dry and so I organized them as well.

20140118-211745.jpgA pretty good day in the Hangar! Tomorrow I will get to match drilling the stiffeners and skins.

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