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Mike & Aneta's RV Projects
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Date: 7-7-2013
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Number of Hours: 5.00
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Manual Reference: L Aux Tank
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Brief Description: Fabricating plumb lines for the L Aux Tank
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Today, while the tank is curing up, all riveted together, I decided to bend and flare some plumbing for it. The lines I fabricated will connect the left main tank with the left auxillary tank, so that fuel can be drawn from the aux to the main in flight. There is also a vent line that must be plumbed, as well as the connections through the transfer pump. Since the transfer pump will actually be mounted to a bracket, which is mounted to the spar web, I needed a way to template it's location. This way, I can plum everything while it's easy to reach, and know that the pump will be in the same location on the spar bracket. The way I did that, was I used a sheet of scrap and drilled/clecoed it the to the rib flanges, so that it mimicked the spar web. Then I drilled/clecoed the pump bracket to it and temporarily bolted the pump in place, using non aviation grade hardware. Then I plumbed everythig to fit and then took everything apart. Later, I will cleco the template plate to the existing holes in the spar web, and voila, I can simply match-drill to locate the holes for the bracket!
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Scrap plate, pretending to be the spar web.
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Pump temporarily bolted to the bracket so I can plumb.
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Plate now becomes the template for drilling spar web.
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