On Fri, 7 Feb 2003, Eric Zeno wrote: > Assuming the fuel has the > same weight as water, Bad assumption. Gasoline = approx. 6 lbs per gallon. Water = approx 8 lbs. per gallon. (U.S. gallons) > how high would it have to be? Reaching back into my fluid power classes... Pressure (psi) = height (feet) * density (lbs per cubic foot) / 144 Water is 62.4 lbs per cubic foot, so gasoline must be roughly 41.6. Solving for height... Pressure * 144 / density = height So 3 * 144 / 41.6 = 10.4 feet The bottom of your tank needs to be 10.4 feet above the heater for a minimum of 3 psi. The pressure will be a bit higher with a full tank, but not much. Anyone want to check my math? _ _ __ _ _ _| | | | David M. Brodbeck (N8SRE) Ypsilanti, MI / _` | | | | | | +----------------------------------------------------- | (_| | |_| | | | @ cyberspace.org \__, |\__,_|_|_| "To the optimist, the glass is half full. To the |___/ pessimist, the glass is half empty. To the engineer, the glass is twice as big as it needs to be." |
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