Paul Lamar wrote:

Dick [MacCoon] has a few rules of thumb for cooling liquid cooled aircraft
engines. He says 2 cubic inches of rad volume are necessary for every HP. That
means we should be cooling with 400
cubic inch rads and right now it is taking 500 to 600. We are not doing a good
enough job on the scoops and ducts.

That rule of thumb ("heuristic") should be tempered with the knowledge that the
radiator volume requirement varies inversely with the delta T and directly with the
radiator thickness.  Was Dick's experience with engines that had significantly
hotter coolant systems?

Russell Kent

I don't know.

Paul Lamar


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