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Dan's Web Site
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Date: 12-2-2002
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Number of Hours: 2.00
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Manual Reference:
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Brief Description: Fabricate Anti-Rotation Bracket - Pickup
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Even though I purchased one flop tube and one standard pickup tube, I think I am going to exchange the flop tube for another standard pickup. I have been reading about flop tubes and discovered that they are not really needed if you are doing mild, positive G aerobatics - loops, rolls, etc. Also, if you are not putting in an inverted fuel an oil system and you have a carburated engine, the flop tubes aren't necessary. Since these other mods are very expensive and since I only plan on doing an occasional roll, I'm going with the lighter, cheaper, easier to install standard pickup tubes. Anyway, I had to fabricate a small anti-rotation bracket from 1x1 angle. This was fairly easy to do with the unitbit. Just one 9/16" hole for the fitting and two #30 rivet holes. I had two problems though drilling this piece to the access cover. First, I took a ton of time deciding where to locate this. I ended up clecoing the fuel tank back together and trial fitting the pickup tube to the bracket and AN fitting on the access cover. Then I made the mistake of drilling the rivet holes of the bracket to the cover. This made it very difficult to drill the 9/16" hole for the AN elbow fitting. I measured and drilled this hole as accurately as possible but it was still slightly off in that the rivet holes no longer lined up perfectly. I ended up enlarging the #30 rivet holes slightly. With the proseal and squeezed rivets, I'm sure this will be just fine. I will drill the 9/16" hole first on the left tank.
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Reinforcement ring and nutplates riveted to inboard fuel tank rib
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Fabricating the anti-rotation bracket for the fuel pickup
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Fuel pickup fitting and anti-rotation bracket drilled to cover
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