I’m confused about the meaning of this word. Is it how much a horse can pull translated into how much the engine can pull? Also, what is the actual “metric”? Why do we still use this? It seems archaic.
Also, what type of horse was originally used to get the measurement?
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A horsepower is a unit of power. Not so much the force you can pull, but the energy output per second. It may translate to the force you can pull, or to the speed you can reach, depending on what gear you use; different gears use power for speed or for force.
A horsepower is the average power of one draft horse during routine, non-strenuous activity. Measuring the engine in these units compares it with a horse, how many times is the engine more powerful than a horse.
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