[AT] Small Farm Tractors vs Garden Tractors

[Jim and Lyn Evans]

What gets confusing is ratings of steam engines:  They are sometimes rated
on brake HP (belt HP), and are sometimes are rated at boiler HP.  Boiler HP
has something to do with the potential HP from the steam or it might just be
a measurement of the firebox size.

And a 1 HP electric motor is worth about 3 HP gas motor.

Jim

-----Original Message-----
From: at-bounces at lists.antique-tractor.com
[mailto:at-bounces at lists.antique-tractor.com] On Behalf Of George Willer
Sent: Tuesday, March 09, 2004 10:22 AM
To: Antique tractor email discussion group
Subject: Re: [AT] Small Farm Tractors vs Garden Tractors

Tim,

To add to the confusion are the different definitions of a horsepower.  The
most widely accepted is James Watt's definition... 33,000 foot
pounds/minute.  Then there's the Sears horsepower that I'm not sure how it's
defined.  I THINK it is determined by the amount of noise a machine makes
when it hits a brick wall at full speed.  It's used to rate air compressors,
vacuum cleaners, lawnmowers, and maybe stereos. :-)

George Willer

----- Original Message -----
From: "Tim Bivens" <bivenshill at yahoo.com>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Tuesday, March 09, 2004 9:24 AM
Subject: RE: [AT] Small Farm Tractors vs Garden Tractors


> H.L.
> Brake horsepower and SAE horspower are both horsepower
> ratings of the engines. The Case VAC and all regular
> agricultural tractors are rated by drawbar horsepower.
> This is what they use in the Nebraska Tractor Tests
> and is the standard by which agricultural tractors are
> rated. The smaller garden tractors, mowers etc. are
> rated by the engine horsepower which is going to be
> quite a bit higher than the actual drawbar horsepower.
>
> Tim Bivens
> Glen Rose, Tex.


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