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B How Horsepower is equal to 550 ft lb/s ?

  1. Jan 6, 2017 #1
    How did James Watt found out that one horsepower is equal to 550 ft lb/s ? There must be some sort of derivation or something that he did.Can anyone show me that derivation.
    Last edited: Jan 6, 2017
  2. jcsd
  3. Jan 6, 2017 #2


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    From observation of the haulage power of a horse . He fiddled the answer a lot though for commercial purposes .

    Boulton and Watt manufactured steam engines .They were a bit notorious for making exaggerated claims about the power and economy of their engines compared to horses .

    Last edited: Jan 6, 2017
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