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Airflow exit lower cowling

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Dave.flying

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Joined
Jan 27, 2007
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Is there a forumla for working out the size of the hole in the lower engine cowling to where the air vents outto insure adequatecooling of the engine. The plans have it the full width of the fusalage which does not look very nice. Lots of other aircaft seem tohave different sizes.
Dave
 

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