Size of the horse

[SprintV8]

They used to measure 1Horse power,<br>
<br>
May be why these's so much difference with Rolling road figure's

<p>1980 Dolomite SprintV8 (Soon to be shoehorned with a 360bhp TVR AJP V8 !)<br>
1997 Vauxhall Calibra 2.0 16v SE8 They laugh at me because I am different. I laugh at them because they are all the same!)<br>
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[1300dolly]

horsepower is defined as work done over time.the definition of one hp is 3300 lb-ft/minute. Originated by J Watt in 1815, inventor of the steam train (and giver of unit of power the watt) To sell his engines he needed a way to rate the power .He work out that<br>
A work horse attached to a mill walks a 24ft diameter circle pulling a force of 180 lbs.thehorse makes 144 circles/hour= speed of 181 ft/minute x 180 lbs of force = 32580 ft-lbs/minute<br>
So therefore one hp is 32580 ft-lb/minute<br>
This was taken by all as the way to rate engine power<br>
Hope this clears it up for you.<br>
Oh early engine makers cheated by removing generators, waterpumps etc to increase the lb-ft,sorry hp reading.<br>
Justyn

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[SprintV8]

But how many hands high was the horse.<br>
<br>
Are we talking a BIG Shire horse.<br>
<br>
Like the one's used to pull plough's in the good old day's.<br>
<br>
<br>
Usefull bit of info mind,<br>
Never knew it was James Watt.<br>


<p>1980 Dolomite SprintV8 (Soon to be shoehorned with a 360bhp TVR AJP V8 !)<br>
1997 Vauxhall Calibra 2.0 16v SE8 They laugh at me because I am different. I laugh at them because they are all the same!)<br>
</p><i></i>

[2F45T4U]

I thought it was 22,000 lb a foot per minute.<br>
<br>
And wasn't it a mine pony?

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[davepoth]

33,000 lbf/m and it was an amalgamation of horses.

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[1300dolly]

As far as i know it was never recorded what the horses where as he wrote work horses of the kind that work the mill stones but i guess the different types of materials offer different resistances whilst being milled so it was one mans oppinion and most people thought he must be right as no one else know any better. <br>
We all belived the earth to be flat at one point in history!<br>
Justyn

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[1300dolly]

p.s you wre right dave as its commonly know to be 3300 lb/ft as thats what it was rounded to to ease the calcalation so the higher the output the more the error margin is.<br>
Justyn

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[davepoth]

Rumour has it that watt overestimated the power a of a horse by about a third (i.e. a 2hp engine can do the work of three horses) just so he could make sure his steam engines performed well against the expectations of customers.

<p></p><i>Edited by: <A HREF=http://p206.ezboard.com/bthetriumphdolo ... avepoth</A> at: 13/12/05 5:30 pm<br></i>

[1300dolly]

clever marketing ploy just hope ford dont try to retro sue his family:rollin<br>
Justyn

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