[AT] Horsepower question

[Larry Goss]

LOL!  After suffering a stroke last year, I find myself relying less and less on the viability of what I remember.  To that, my wife says, "So what's different?"

Larry

----- Original Message -----
From: charlie hill <charliehill at embarqmail.com>
Date: Thursday, October 7, 2010 8:28
Subject: Re: [AT] Horsepower question
To: Antique tractor email discussion group <at at lists.antique-tractor.com>

> The one thing I did apparently remember right was from test # 
> 793 for the AC 
> H-3 crawler.
> "Weighing in at 7395 lbs it made a low gear pull of 7893 lbs at 
> 1.17 mph 
> with 6.39% slippage"
> 
> Charlie
> 
> --------------------------------------------------
> From: "charlie hill" <charliehill at embarqmail.com>
> Sent: Thursday, October 07, 2010 9:03 AM
> To: "Antique tractor email discussion group" 
> <at at lists.antique-tractor.com>
> Subject: Re: [AT] Horsepower question
> 
> > 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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