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Vented Fuel Cap - Inverted FlightPerry Testory gave me some really good ideas on how to alter a vented fuel cap. What he did was place a # 6 screw through the hole with a rubber washer and a large steel locking nut on inside of cap, on the top side I used a internal locking washer. Don't tighten (use long enough screw to use most threads) let the screw move 1/16th " or so. The washer seals the cap when inverted and vents when upright. Notice that if your tank is vented upright by a forward facing wind vent (I hope it is) the screw is in the seal position in flight. If not wind vented ignore these instructions. If it is don't worry if the tank creates a suction the vent screw will open. Perry Testory N9BR
Did It Work?Well... Not very well. Apparently I couldn't find the right rubber washer because it leaked all over everything. Not long after that, I was walking by gas cap display in an automotive store and saw a "splashproof" gas cap that looked like it would fit. I put my son, Kade, in the front seat with the old cap in his pocket just in case we needed to switch and turned it upside down... NO LEAKS! Cool! We flew inverted for a bit just to make sure and it looked like it was working fine. Just to make sure I pushed the stick forward to put a few more negative Gs on us and the old fuel cap and 40 bucks sailed out of Kade's pocket and over my head! So, the good news is that the new splashproof fuel cap worked quite well, but the bad news is that it cost me a lot more than I thought to find out! Oh well... |
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