Assembled Trim Tab

Bought a 3/4″ MDF panel at Home Depot. Leveled it out on the bench and shimmed the dead spaces with sheets of paper to create a flat surface.

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Prepped the skins, spar, and trailing edge with isopropyl.  Mixed up a small batch of fuel tank sealant and put a thin layer on each side of the trim tab ribs and set them in place. I used the 3M VHB tape on both sides of the trailing edge. Used clecos to align it with the bottom skin and set it in place. Then I clecoed the top skin in place along the spar and trailing edge. I peeled the paper from the VHB tape between the top of the trailing edge and the top skin removing clecos as I went to avoid tearing the paper. I replace the clecos to clamp the whole sandwich together while the tape sets up.

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The sealant is ridiculously sticky and smells like ass.

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I riveted the top skin and hinge to the spar.

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All done!

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Weighted down the skin with a board and some 2×4’s to ensure contact between the skins and the ribs until the sealant sets up. The spec sheet says there is a 6 hour cure time for the B 1/2 sealant I used.

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Today’s Time (hours): 1.5
Empennage Time (hours): 101.5
Total Time (hours): 101.5

 

Disassembly and Deburring

Clecoed and final drilled the elevator horns to the inboard ribs and spars.

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Cut the trim tab pushrod parts and the trim tab horn parts.

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Deburred everything and got about half the parts scuffed and ready for primer. Next I’ll scuff the rest of the parts, peel and scuff the skins and prime everything.

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My pint of fuel tank sealant arrived from Sky Geek today. I’ll use this to glue the foam ribs in place.

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Today’s Time (hours): 3.0
Empennage Time (hours): 88.0
Total Time (hours): 88.0