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Old 02-07-2013
Stumble Stumble is offline
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Re: Repower confusion (horsepower)

One of the things with those programs is they assume perfect conditions. Figure you are going to use up to 10hp for the alternator, your going to need a few hp to counteract the power of a head wind, and a few for transmission losses. My guess is that their program is telling you what you need in shaft horsepower, not engine horsepower.
Greg Rubin
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