[AT] Horsepower question

[charlie hill]

Larry, thanks for the correction.  As usual these days, my memory failed me. 
I should have checked my facts before posting but didn't have time.  At 
least it made for good discussion.  grins.

Charlie

--------------------------------------------------
From: "Larry Goss" <rlgoss at insightbb.com>
Sent: Wednesday, October 06, 2010 11:45 PM
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Subject: [AT] Horsepower question

> It's hard to "draw rules of thumb" out of the Nebraska tests.  But here 
> goes --- Drawbar pull is generally in the range of 50% to 60% of the 
> weight of the tractor.  Some Caterpillars drop as low as 45%.  Drawbar 
> horsepower is in the range of 50% to 70% of Belt or PTO horsepower. 
> Slippage of the drive wheels varies from 2% to 15% regardless of steel or 
> rubber, but rubber generally runs a bit higher than steel   I don't know 
> that the tests were ever run with the intent of maximizing the balance, 
> traction, weight, etc, the way we do as pullers.  I'm sure the slippage 
> values would be much higher if they did.
>
> I found out a few months ago that a one of my wife's close personal and 
> professional friends is the daughter of one of the men who ran the 
> Nebraska tests for years.  I hoped she would be able to tell me stories 
> from Lincoln about those tests.  Unfortunately, she studied music and had 
> no interest in what her father was doing at the University.
>
> Larry
>
>
>
>
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