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Old 10-13-2017, 08:10 PM
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Bobneal1
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I plugged my vents for part of a season and it was a disaster. Air temperature swings will change the pressure in the tanks from positive to negative and you will develop leaks in your fuel tanks. My UAT even unscrewed it's own cap and started leaking. My airplanes were in a non temperature controlled environmentand were always defueled at the end of flying. My Kevlar tanks developed cracks and I had never had a fuel leak before in ten years of flying jets.

After I stopped plugging my fuel system , all problems vanished.
The air expands and contracts with temperature and will flex your tanks til they crack.

I only plug now to transport or flip the model over for repairs.