Posted by rhtx55 on December 05, 2012 at 18:58:14 from (220.127.116.11):
In Reply to: 3 cyl vs 4 cyl? posted by joshua rod on December 04, 2012 at 19:04:12:
wikipedia: "Horsepower is defined as work done over time. The exact definition of one horsepower is 33,000 lb.ft./minute.
Put another way, if you were to lift 33,000 pounds one foot over a period of one minute, you would have been working at the rate of one horsepower. In this case, you'd have expended one horsepower-minute of energy."
How much force (HP) is required to pull a two bottom plow through the soil.
How much force is required to get it moving?
How much additional force is required to keep it moving at a rated speed to the end of the field ?
Anyone with experience with horse pulling can give you one opinion on Horsepower, some teams can pull up to two times their combined weight, of course, this is only for ten feet or so, BUT I doubt they would be able to do it down to the end of a field.
So.... it all becomes relevant to how efficient an older tractor is compared to any newer versions.
Fuel consumption per hour, for sure, and how long they can continue without any break downs or stoppages.
I am a bit anxious to see how many modern tractors will last 80 years after performimg the same amount of work these old ones have.
I can imagine this same argument was had between father & son back when the first Regular tractor replaced the beloved teams of Percherons, or Belgians, then later when the new H replaced the F20 and so on through the decades.
Are the new tractors better ?? In some ways yes, but only time will tell.
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