beastly physics

Which horse? Arabian, Clydesdale, quarter, etc?

and peak or average

and rocking or carnival

550 ft*lbf/sec

RichD wrote in news:3e44a038-949a-4739-a3d6- snipped-for-privacy@googlegroups.com:

745Wh... But I see where you are going... maybe... as in... for how long? Like between meals and rest (recharge).

What did riders do? 50 Miles a day? 150?

Or do you mean: "How hard can a horse pull on a lever that has a horsey peloton attached to it?" :-)

John S wrote in news:qsrsbd$2g9$3@dont- email.me:

That should have been termed "Instantaneous power".

Because they cannot do it for long, and must rest at some point. That is not a normal limitation for our man made power generation devices.

Not like other forms of power generation, or an "engine".

More like a strorage cell. They push at a rate, but only last for a certain period.

Ok... so more like a storage cell.

How many joules does a horse put out until it needs to rest and refill, and show the curve for that output over time, becuase it does not stay constant or flat.

Yep... a lot more like a storage cell.

You may rewrite the physics books and change as you see fit. Until then it will remain 550 ft*lbf/sec as the physics community accepts it.

From what height are you dropping it and over what period are you measuring?

Cheers

--
Clive

Wikipedia has the history. Apparently a good horse can make 15 HP for a short time.

--

John Larkin         Highland Technology, Inc 
picosecond timing   precision measurement  

jlarkin att highlandtechnology dott com 
http://www.highlandtechnology.com

The original horsepower was used to compare horses to steam engines. I think they assumed 4 hour shifts.

Wiki says a good horse can make 15 HP in a burst.

--

John Larkin         Highland Technology, Inc 
picosecond timing   precision measurement  

jlarkin att highlandtechnology dott com 
http://www.highlandtechnology.com

John S wrote in news:qsrtno$2g9$ snipped-for-privacy@dont-email.me:

No. That is what "one horsepower" converts to.

"One horse" is a different animal, and the physics community will tell you that.

He asked about a horse, not a horsepower.

The horse may or may not even be able to reach that number, much less sustain it.

The physics books are about a number assigned by James Watt.

Do you think he amalyzed 100 or 1000 horses to get to that number?

Do you think all horses are alike?

Then no, your claim is incorrect and that is not what ANY physics book states, because the physics books are not talking about a horse.

They are talking about a value assigned by a scientist to use as a comparative value with which to measure other power generating devices.

Even his draft horse element has a limited capacity to produce at that rate.

Still... power is instantaneous capacity, and WORK is over time.

Oh, and I never said that your number was incorrect as a referance against "one horsepower".

So why the stupid attack instead of intelligent analysis?

Or is the real physics over your head?

Clive Arthur wrote in news:qsrtqg$svi$1 @dont-email.me:

Also depends on the hardness and thickness of the landing site.

An elephant can warp a carom table slate quite easily. It rebounds sure... if it doesn't fracture.

Point is a pile of pillows would likely reveal a much softer slew plot for the landing event than say an airport runway slab.

John Larkin wrote in news: snipped-for-privacy@4ax.com:

"Power" is instantaneous measure. It gauges what the horse can lift, not for how long.

"WORK" is power over time. Watt/Hours.

Mr. Watt merely needed a reference for everyone. After that it was never about a horse.

See... way to wide a 'family' of variables to base a standard on.

550 foot pounds per second for a horse, one horsepower for horse kind.

--

  Rick C. 

  - Get 1,000 miles of free Supercharging 
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"Work" is usually considered to be energy. Energy is power * time, more specifically the time integral of power.

Watt/Hours would be the rate of change of power. Watt-hours are energy.

Read the Wiki piece about horsepower.

--

John Larkin         Highland Technology, Inc 
picosecond timing   precision measurement  

jlarkin att highlandtechnology dott com 
http://www.highlandtechnology.com

In Sevre outside Paris, they used to keep e.g. the standard kilogram and meter prototypes. They also kept the standard horse in Sevre which was used to define one horse power :-). Unfortunately, the horse got old and died, so most countries now use Watts or kilowatts instead of horse power.

Most standard definitions are now independent of any physical objects kept in Sevre, but some people still think that there is a mythical thing called absolute ground potential, so apparently they still keep it in Sevre :-)

Rick C wrote in news: snipped-for-privacy@googlegroups.com:

Not "for a horse".

It was... for THE draft horse that James Watt took measurements from. From that, he calibrated a new standard gauge and from that point forward no horse was needed further.

Easy to see that all horses and even that all "draft horses" are not the same, nor would they have the same capacity to lift or pull. Then even the same horse would differ from sea level to say, Denver, or atop Mt. Evans.

The "unit of power" that is "horsepower" has no issues as we have calibrated references and comparative standards, but the original derivation has its issues examined closely.

I can not remember the exact numbers but do remember it was something like hours and the horse size was a draft horse. A man can generate something like a horse power for a short time.

Dan

I think the electrical cheat was about ten percent so that a "one horse" motor could reliably win in the typical motor -VS-horse demo. It is known that the cheat was on purpose, to sell electrical power.