"Robinson, Chad" wrote:

Does the heat output scale linearly with the number of rotors? 
That is, is the cooling challenge for a 20B exactly 150% of the 
challenge for a 13B, or are there other issues related to the heat 
density, maybe obstructions to the flow of coolant or oil, 
or anything else like that here?

Thanks,
Chad

Directly proportional to HP. Lots of ducting issues. The obstruction
behind the radiator are more critical than the inlet duct because
everybody intuitively  understands an inlet duct for the most part.

Paul Lamar
 
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