Re: H POWER

Posted by john d. on March 22, 1999 at 14:52:02:

In Reply to: H POWER posted by SCOTT KEMP on March 21, 1999 at 12:21:01:

Depends..... power is the rate of doing work. Horsepower is the rate of doing work as compared to a "theoretical" horse. (The standard was set long ago in reference to steam engines.) If you turn up the rpms, you will pull the same load faster, thus doing more work in less time, thus producing more power.
The "rated speed" or factory setting for the governor is a compromise. The speed is set to produce an amount of power deemed appropriate for the size and weight of the tractor, while limiting speed to a level which will let the engine live for a looooong time. If you turn up the rpms, you will get more hp, until you reach a point where the engine cannot breathe efficiently, or something breaks. If you're pulling with the tractor, you can't use more hp than you can transfer to the ground. That will likely be your limiting factor as to how fast you want to go.
On a tractor engaged in field work, increased rpms will get the job done sooner in the same gear, and generally won't tear up the transmission unless the tractor weight is greatly increased in an attempt to gain traction. Increased hp found through increased rpms should usually be used to pull the same loads faster, not to pull increased loads.
Since you're gonna pull it in competition, it doesn't have to stand the strain for long, so experiment a little and see how much you gain from turning it up. As mentioned in another post, it's surprising what they'll take if you don't run them at full rpms with no load!

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