I thought that having tanks fitted for inverted flight might be added value if and when I decide to sell the RV. Let's hope that day, if it ever comes, is after many years of flying enjoyment. Anyway, the tank modifications necessary for sustained, inverted flight are actually quite simple and could easily be done after completion, but I decided to go ahead and do the work now.
First is a "flapper" riveted to the next to last rib which acts like a check valve to keep fuel in the root bay of the wing. Then two strips of aluminum are placed in the root bay to prevent the flop tube from getting hung up on the tank access plate platenuts or the lower skin stiffeners.
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| Preparing to rivet the flapper to the rib |
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I used a strip of aluminum and my ruler to ensure an
adequate gap between the flapper and the tank skin. |
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| The flapper installed and closed |
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| The flapper installed and open |
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| The flop tube anti-hang-up brackets |
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