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.
It was just behind the prop, forcing air over the engine and into the oil cooler ring (red), no power loss there, nice try .
Last edited by KG26_Alpha; 01-31-2012 at 10:12 PM.
01-31-2012, 08:58 PM
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