Quote:
Originally Posted by The Phantom Gourmand
Sounds like a great idea, and easy to do too. but I wonder how the pressure would be affected by air and water temperature. I would guess that on a real hot sunny day, with the boat out of the water, in the sun, that you could end up with some "balooning" pontoons.
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Generally speaking you'd only need to know that the internal pressure of the pontoons was greater than the outside atmospheric pressure. You're correct that on hot days the pressure might go up more than usual, but it should still settle back down to something above outside air pressure as the 'toons cool.