Isn't it more work done over a day? One horse is able to maintain the work done by a one horsepower machine because the machine can work all day without tiring?
Yes, but why not make it one horse=1hp? That sounds like early marketing.
Edit: Let me be clear, why not make the current 15hp = 1 horse and make the measurement be 1hp = 1 horse. It has nothing to do with engineering or marketing logic, just a 1:1 measurement.
Because when looking to replace work horses with a steam engine you didn't care what the absolute peak output of a horse was. You needed to know how big of an engine you needed based on how large the team of horses already powering the application was. Anyone trying to run a horse anywhere near their peak output for any length of time would injure them.
For comparing machines to horses, use the power a horse can sustain all day long. Early industrial use of horses did not run them ragged and swap every 5 minutes.
So you're saying one hp = one DAY of horse power. How is that even a measurement? How old is your horse and how hard can it work in a day? Lmao, this is turning into a comedy bit.
So you’re saying one hp = one DAY of horse power. How is that even a measurement?
because thats the expected constant power output from a horse given the timespan of about a day (the average human utility time span also)
This is like saying that a bullet upon impact imparts infinite kinetic energy because the time window in which it's measured is literally 0 seconds.
Also if we happen to extrapolate the horse power metric, it's the most power you could utilize from a horse, long term, forever, assuming you wanted to.
This is like saying that you never need to change the oil in your car, because you can just ignore the rest of the miles on it that are outside of the service window.
The unit is literally measuring "what is the theoretical maximum on the possible amount of work that a horse can exude in a continual fashion" considering that engines quite literally, do not care about taking breaks, this makes logical sense. Since the obvious selling point of an engine would be "you don't need to feed it, it doesn't get angry, and it won't kill you if you look at it weirdly, plus it just runs forever, assuming you have the gas."