Building N624WG Picture 4WG010LG

Building N624WG Picture 4WGMASTR

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Detail of upper wing root, topside, showing the wing fuel tank now enclosed by geodetic pieces, and the rear and main spar attach fittings. Notice the sewn felt sleeves protecting the banding and tank where the banding passes over the tank edges. See the previous page for more discussion on wing tank installation and filler neck and cap issues.

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Builder's notes:

As stated previously, pressure test the tanks before final installation in the wing root bay!
Notice the red material running the length of the top of the near wing rib. This is automotive body filler, applied on any points of the structure, including the leading edge, over which the wing covering fabric must pass, that might not be perfectly flat as constructed, so that the fabric won't dip or bulge. And, all points of contact with the fabric must be well sanded and varnished, with a final coat of an epoxy varnish (to avoid pull-up by the fabric cement). Any small imperfections - grit, sawdust, brush hairs from the varnishing, etc., will show up magnified under the fabric.

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