Quote:
Originally Posted by GRU
it depends on what the belt is driving...
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The OP's theoretical load is just the belt and idle pulleys; no accessories.
Quote:
Originally Posted by drmiller100
one way to measure it is to feel the heat in the belt. The belt "robs" horsepower, and turns it to heat. A serpentine belt is VERY cool to the touch.
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Heat is a great way to imagine how much power is lost in turning the belt. To consume 1hp, the belt and pulleys would have to dissipate 746 watts of heat. Imagine a portable electric space heater running at half power. That's 1hp.