Quote:
Originally Posted by Isaac Zachary
apparently you truely believe there's some perfect correlation between power and CdA.
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Yes and no.
There is a correlation between cooling air demand and cooling drag as well as a corellation between power and cooling demand.
It's not perfectly proportional and depends on the engine type a lot, but more powerfull engines of a given type have a tendency of requiring more cooling, resulting in a higher cooling air demand, wich causes more drag.
In addition to that a lower deltaT means more cooling air is required for a given thermal load.