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#17
April 29th 06, 01:41 PM
posted to rec.aviation.owning
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Vapor lock in a Skylane... not possible!
Vapor lock is a starving of fuel at the carb bowl while a low
pressure-high temperature area in the fuel delivery system delivers enough vapor that the fuel pump can't get to liquid fuel. You just don't have that situation in a gravity system. What you may be considering vapor lock in a gravity system may be fuel boiling in the carb bowl due to radiated heat from the exhaust system. This causes the float to sink in the "foam fuel". The bowl then overfills, and the excess fuel is vented from the bowl into the air intake, flooding the engine. The key is that all aircraft carbs vent the bowl to the air intake, allowing a way to flood the engine. This is not very well publicized. TriPacers probably flood the second way. Cherokees could go either way. Does this jibe with any observations? Comments? 
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