jon said: (quoted from post at 18:10:17 11/23/14) Just lost a sale on an 8n because he didn't think it would run a bush hog good enough with HP in the mid 20's. (I've read 25-27?) He said his lawn mower is 18 hp & it won't cut it.
How do you explain the apples to oranges scenario here?
Horsepower is a measurement of what they call in the physics world 'Work'. Work is the application of a force over a time and distance. You want more horsepower you just have to increase your time and distance metric and keep the same force.
The true GRUNT of an engine isn't it's horsepower but it's torque. Torque is the force the engine puts out like others mentioned above. Torque is force metric that is put out at it's max potential. A good way to think of it is imagine you have a really stuck bolt and you can't bust it loose. Well, we've all grabbed a cheater pipe and put it over a breaker bar/ratchet to break loose a bolt. If you are a 150 lbs person and you place your full weight on a 1 foot long ratchet you are exerting 150 ft/lbs of force. If you grab a 2 foot long cheater bar and then put all your weight into it you are then putting out 300 ft/lbs of force.
Just like with busting bolts/nuts loose, torque is what gets the really tough work done.
Food for thought, our little N's put out about 250 ft/lbs of torque on the PTO shaft. A 25 hp lawn mower is only going to have about 45 ft lbs of torque given they have to get everything spinning up around 3000-3500 rpms to get 25 horsepower out of it. There is no comparison.
This post was edited by kossuth at 21:05:01 11/23/14.
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