So the racer boys and the factories have figured out that there are some efficiencies to be gained in the cowling area.
The idea that if the air going in the cowling does not have equal release behind it...it will pile up and come out the front killing prop performance....high performance planes typically seal well around prop shaft cowling area...
to properly cool the engine we need a certain pressure drop from top side to bottom side of engine and can run a manometer...we can then balance the outlet size of our cowling to produce a true flow rather than too large of a cavity that will create a vacuum the wrong direction...
the factories have shut off the front cowling sizes considerably look at the newer aircraft and carbon cub...
has anybody worked at closing off portions of their cowling and verifying that the flow through the engine is un-impeded and not coming out the front????
The idea that if the air going in the cowling does not have equal release behind it...it will pile up and come out the front killing prop performance....high performance planes typically seal well around prop shaft cowling area...
to properly cool the engine we need a certain pressure drop from top side to bottom side of engine and can run a manometer...we can then balance the outlet size of our cowling to produce a true flow rather than too large of a cavity that will create a vacuum the wrong direction...
the factories have shut off the front cowling sizes considerably look at the newer aircraft and carbon cub...
has anybody worked at closing off portions of their cowling and verifying that the flow through the engine is un-impeded and not coming out the front????