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Date:  12-31-2009
Number of Hours:  8.50
Manual Reference:  
Brief Description:  Wing Conduit

As a means of passing the wiring out along the wing as well as supporting the fuel tank vents, I came up with a trapezoidal bracket. The leading edge larger lightening hole seemed the most likely location to put such wiring and tubing. Because it's such a tight area, a jig to facilitate drilling the ribs, using a 90 deg angle drill, seemed appropriate. Accordingly, I made a jig to drill the bracket holes, as well as the rib holes out of 3/16 inch steel. Three tabs center the jig on the lightening holes. The brackets were made out of .040 inch 2024-T3, and are secured to the ribs with 6-32 machine screws and plain nuts with lockwashers, except in the region of the aileron pulley, where Tinnerman clips were used to make access simpler. After alodining and priming the brackets with Zinc Chromate and placing grommets, I threaded Van's Aircraft corrugated conduit throuh the center grommets, and then pulled the conduit through the lightening holes. I wasn't smart enough to realize I needed the fuel tanks removed to do this, so I had to remove the fuel tanks (again). After pulling the conduit tight, I placed a tie wrap on each end and Super-Glued them to the conduit to prevent the conduit from pulling loose.
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Dual purpose jig, bracket side up.

Dual purpose jig, bracket side up.

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Pulling conduit through the wing.

Pulling conduit through the wing.

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Installed brackets and conduit.

Installed brackets and conduit.

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