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kenpowell@comcast.net wrote:
I think Al and Bill have been trying to say this politely but .... We all agree that the EWP flows less than the standard pump by alot (maybe only half to 1/3th as much?). That's OK. But if you have less flow then the radiator MUST be larger for the engine to obtain equal cooling.
>>> I thought less flow might be partially / substantially compensated for by greater dT you would achieve from slower flow through the same radiator. Is this not significant?
This equates to more drag. Now does the EWP save more energy than the ~3HP the mechanical pump uses even when the extra cooling drag in factored? In other words, does the EWP save 3HP worth of cooling drag? I suspect that the mechanical pump is more effecient but can't prove it. Bill, Al, Ed and some of the engineers can probably give us a good idea though (and have). No numbers here, I'm just trying to piont out the real issue - energy expended at WOT, cruise, and climb.
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