It wasn't until I started looking it up this morning I found that they even
have a different horsepower!
A standard HP is 550 and a metric HP is only 542.5 ft lb/s. I know in
round terms that 1 BHP is around 3/4 kW, but now European specs all seem to
talk about PS whatever they are.
Why can't people leave things alone so we can all understand them?
Jon
-----Original Message-----
From: Don Kerr [SMTP:dkveuro@pop.flash.net]
Sent: Thursday, June 22, 2000 4:05 PM
To: Jon Hobden
Cc: LSR list (E-mail); 'lemay@hiwaay.net'
Subject: Re: Terminology Question...History Month on BBC.
Hi Jon.....What about those stupid Kw or summat the Jerrys use fer
engine power ? 'Bout the "War of Independence", it weren't a war...it
were a 'tactical retreat', after all, the Yanks wouldn't have taken it
of our hands unless we made 'em fight fer it !!!!!
DK (Puttin' history write.) Yes Rich, I know...Duh!
Jon Hobden wrote:
>
> At the risk of another War of Independence.....
>
> When I went to school here in the UK we were in the transition period
when
> we worked in both imperial and SI units, and to my understanding:
>
> Torque is measured in lbf ft, pound-force feet, equivalent to 1.4 Nm
> Energy is measured in ft lbf, foot pound-force, equivalent to 1.4 J
>
> So 1 lbf ft is the rotational torque exerted by pulling a 1 foot lever
with
> a force of 1 pound, while 1 ft lbf is the energy given to a body by
> exerting a force of 1 pound over a distance of 1 foot. (note both
> measurements have the same dimensions)
>
> What I always had to think very hard about in the "old" system was the
use
> of poundal instead of lbf - it all seemed so much easier in SI, which
I've
> been thinking in for the last 30 years, except of course for units like
BHP
> and for large capacity engines, CI.
>
> Jon Hobden, Horley, England
>
> (Off to Goodwood Festival tonight, and looking forward to seeing some of
> your history
> http://www.goodwood.co.uk/biweb/Salt_Flat_Racers.html
> it will be interesting to see how they negotiate the hillclimb!)
>
> Date: Wed, 21 Jun 2000 15:46:01
> From: "Lawrence E. & Cathy R. Mayfield" <lemay@hiwaay.net>
> Subject: Terminology Question...
>
> Maybe I can start a war...
> I went to school and learned that torque was "ft-lbs".
> I often see and hear nowadays the term "pounds - feet"
>
> So whay are all those guys WRONG! I know my terminology is absolutely,
100%
> correct, so whay are Thos other people using the completely wrong term of
> pounds-feet?
>
> :) mayf
>
> Seriously what is the genesis of the different terms?
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