[AT] Horsepower question

charlie hill charliehill at embarqmail.com
Thu Oct 7 06:59:23 PDT 2010


Haven't had any strokes (that I know of) but I understand what you mean.

Charlie

--------------------------------------------------
From: "Larry Goss" <rlgoss at insightbb.com>
Sent: Thursday, October 07, 2010 9:52 AM
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Subject: Re: [AT] Horsepower question

> 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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