Re: PTO h.p. vs. DRAWBAR h.p.?

Posted by Paul in Mich on February 15, 2005 at 07:30:29 from (66.188.26.29):

In Reply to: PTO h.p. vs. DRAWBAR h.p.? posted by MPM on February 15, 2005 at 04:52:53:

To expound on what the others have said especially paul who comes close, PTO hp is closer to the actual engine hp. Drawbar hp takes into consideration the amount of hp it takes to propel the tractor itself. The weight, gear resistance, and wheel resistance all factor in. It is a fuzzy science, given that it also takes hp to perform some of the engine functions with no PTO or Drawbar load whatsoever. Think of water pumps, fans, fuel pumps, generators/alternators, oil pumps, and hydraulic pumps. They all require hp. As Allan says, if you are going to pull a plow or disk or implement which requires use of the drawbar, then Drawbar hp is most relevant. If you use only the PTO, then PTO hp is relevant. However, if you use both Drawbar and PTO, then both hp ratings come into play. The core idea is to have enough hp for the task, but not overkill so as to negatively affect fuel effeciency and a few other variables.

Follow Ups:

• Re: PTO h.p. vs. DRAWBAR h.p.? Allan in NE 08:05:04 02/15/05 (2)
  • Re: PTO h.p. vs. DRAWBAR h.p.? Hugh MacKay 16:06:30 02/15/05 (0)
  • Re: PTO h.p. vs. DRAWBAR h.p.? Paul in Mich 08:52:23 02/15/05 (0)

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