Talk:John Fowler 7nhp Steam Road Locomotive

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NHP - nominal horse power can not be converted to kilowatts in the same way that brake horse power (bhp) has an equivalent kw measurement.

NHP is a nineteenth century description and has no scientific basis and hence can not be converted in the same way that brake horse power and kilowatts can. NHP was based on a combination cylinder and boiler dimensions as well as working boiler pressure and was created to guide customers in their purchase. NHP was never ever measured on a machine. In recent times some enthusiasts have put traction engines on modern day dynanonometers and found that there is an approximate relationship of 1 nhp developing up to 10 bhp. 119.18.1.147 (talk) 09:43, 14 February 2023 (UTC)[reply]