The difference comes from the various duty cycles offorded by their design. HP = the power required to lift 33,000 lbs a distance of 1 ft in one minute. Given the right combination of gears and/or pullies , any one horse power unit will do this once. That's only one minute of work. A certain power unit may only be able to do this for 5 min , another 10 hrs , and still another indefinately before mechanical failure. But they all had one hp and that means they only have to be able to do it once to get that rating. Some may have to turn 5000rpm to achieve that 1 hp. Some 500 and some 2200. How long do you think a 1hp model airplane engine running 10,000 rpm will last lifting 33,000 lbs a foot a min for 10 hours? It's actually such a misleading and meaningless measurement of true ability that it should be outlawed as a measurement of comparison between products. Max torque is all that matters. It peaks at an rpm governed by the volumetric efficiency of the engine and /or the design parameters of any power generating unit. You cant just add rpm to get more. Max is max. Any engine / motor should be run at the max torque rpm and use gears/pullies or hyd to achieve the required results. There are a lot of 45 hp JD "D",s still going strong after 65yrs of heavy work. How many 45 hp Kubota,s will even make it half that long?? It ain't about horsepower , and never was.
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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