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Sonex 815 Build Logs
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Date: 3-17-2007
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Number of Hours: 0.50
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Manual Reference: T02
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Brief Description: Horiz stab assembly
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Bent the two skins. Thought about how to draw the trailing edges together, since it needs to be lined up exactly at the tip (small end of the skin), and is not lined up by about an inch at the wider, easier-to-bend end of the skin. Took a minute to decide to just cleco the trailing edge row of holes together. Though these were hand laid-out and drilled, it was good enough for the clecoes to go through. So clecoed the trailing edge together. Got a 4x4 wrapped with a towel, put 2x4's on the table to act as spacers, and smashed the 4x4 down over the skin. This resulted in a bend angle of about 90 degrees, which I figured would take massive force to pull down over the ribs. I was shooting for 45 degrees or less. So I put some 1x2's on the table for spacer blocks (I think these are about 5/8" thick, and the skin itself was sitting on a towel to prevent scratches, for a smashed-down thickness of maybe about 1/2"). Smashed down with the 4x4 on top of this, and got about 45 degrees bend angle. Did the 2nd skin without the intermediate step of using the 2x4 spacer blocks first. They both ended up about the same. Clecoed them on to one side of the h-stab frame.
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Cleco the trailing edge together starting at the root.
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The 4x4 in action, first bend attempt.
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First bend - the resulting angle - not bent enough.
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