Quote:
Originally Posted by AndyJWest
The BMW-engined Fw 19Os had an engine-driven fan to increase airflow through the cowling. Presumably this must have taken some power to drive, and I could just about imagine the back pressure from a fully-closed cowl actually reducing available power - though whether this would be significant is hard to tell.
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It was just behind the prop, forcing air over the engine and into the oil cooler ring
(red), no power loss there, nice try .