aerobubba(at)earthlink.ne Guest
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Posted: Wed Sep 12, 2012 7:56 am Post subject: vapor lock / was Fuel pump cooling |
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Re: "... would be to remove heat when the engine is actually
running. Without an auxiliary blower, nothing happens when the engine's
not running."
I saw a Glassair once around Charlotte that had two sets of lateral slots cut in top surface of the cowl, in the aft region of the cowl plenum box. (IE, no separate plenum on the engine...) There were conformal panels of composite sheet held against the inner surface of the cowl with bimetal springs. When the internal air temperature rose sufficiently, the vents opened, and convection took place. The owner said he never again had vapor lock issues, grinning from ear to ear. The slots wouldn't catch your eye as you walked up to the plane, and I'm a tall guy- Very clever and perfectly effective.
Of course, it helps to park with the tail into the wind on a hot day-
Glen Matejcek
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