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Buck's RV-8
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Date: 11-21-2014
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Number of Hours: 3.10
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Manual Reference:
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Brief Description: L wingtip trim, final drill, dimple, reinforcement
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This evening, I removed the clamps from the nutplate backing strip, sanded the excess glue from the edges, then clecoed the wingtip on to the wing and marked a straight line out across the wingtip, extending the trailing edge of the aileron. I power-sanded and manually-sanded the wingtip to match this line, then radiused the trailing edge to match the aileron. The fit is very nice, and I don't think it will need much tweaking once I get the wingtip installed for good.
Next, I drilled out the holes in both the tip and wing skin to #28 for the #6 screws, dimpled the wing skin, and countersunk the holes in the wingtip. As with the right wing, there are two #8 screw locations for mounting a GoPro camera.
Since I had sanded off some of the trailing edge of the wingtip, I did the same thing on this wingtip as I did on the right one -- I mixed up a thick resin/flox mix, and filled the trailing edge with about a half-inch of the mixture to beef up the structure. I applied it deep into the recesses of the wingtip trailing edge with a 1/4” wooden dowel.
I added a bit of 15-minute epoxy to a small section of the nutplate backing strip where it did not get a good bond the first time. This will cure overnight.
Finally, I began prepping the wingtip rib by trimming a bit of it off where it conflicts with the nutplate reinforcement strip, sanding and filing the edges, and test-fitting it.
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