My car manuals say bars for tyres. However I'm a PSI man. Bought my scuba kit in Florida. Quickly learnt to convert PSI to bars when diving in Europe.
US imperialists and torque drivers
Jan 31, 2012
92 Replies
Interesting.
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Gives torque in in.pounds and foot.pounds.
OK I should have said metric units not SI.
Looking closer it seams to be cheap Chinese kit that's "calibrated" in kgf.cm. Pay 5 times as much and you can buy tools in newton metres or Newton cm.
I thought bar supplies were measured in ounces or liters ;-) ...Jim Thompson
[On the Road, in New York]
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I love to cook with wine. Sometimes I even put it in the food.
How about "inches of water"? At least the metric ones are all powers of
10 (nearly).
John Devereux
No it isn't!
Is it?
John Devereux
But they are still the same dimensionally aren't they?
So is there a deep reason for that?
John Devereux
Tauno Voipio schrieb:
Hello,
kilopond was used decades ago, it is no SI unit nowadays. A "kilogram force" would depend on the local value of gravity acceleration, such dependencies are not allowed for SI units.
Bye
No, they aren't. One is a torque and one is an energy. Work done is the inner product (dot product) of force times displacement. Torque is their cross product.
Cheers
Phil Hobbs
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics
160 North State Road #203
Briarcliff Manor NY 10510
845-480-2058
hobbs at electrooptical dot net
http://electrooptical.net
One is force applied, with motion, and the other is force without motion. If it moves, work gets done.
John Larkin, President Highland Technology Inc
www.highlandtechnology.com jlarkin at highlandtechnology dot com
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But is it PSIA, or PSIG?
When I started out, we had to deal with both US units, and metric. Metric was CGS. Then came MKS, followed by "rationalized" MKS, then SI.
Anyone for slugs?
"For a successful technology, reality must take precedence
over public relations, for nature cannot be fooled."
(Richard Feynman)
Last time I was in the UK, the tire inflaters were dual scaled PSI/Bar. Silly unit for tires, the Bar, most car tires are like one-point something.
Retrograde step anyway, Bar are CGS, 10^6 dynes per square centimeter.
"For a successful technology, reality must take precedence
over public relations, for nature cannot be fooled."
(Richard Feynman)
I still like Gaussian units for electromagnetic calculations. None of that epsilon nought or mu nought crap.
Cheers
Phil Hobbs
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics
160 North State Road #203
Briarcliff Manor NY 10510
845-480-2058
hobbs at electrooptical dot net
http://electrooptical.net
Well yes I know that... by dimensionally I mean they have dimensions of e.g. [force][length] which is
[mass].[length][Time^-2].[length] = [M][L^2][T^-2].Yes I think that is the key, torque is a vector quantity and work is a scalar.
John Devereux
In some countries with bail-outs, I guess :-)
Regards, Joerg
http://www.analogconsultants.com/
Who cares ... I know I need to put 32-35 pounds in the tires and it's all good.
Nah, that's only for mil and rocket guys :-)
Regards, Joerg
http://www.analogconsultants.com/
t
st
SI
ic
Ahhh no, Please! Wasn't Jackson enough? I want my capacitance to come out in Farads. How big is a 1 cm capacitor? I've got no 'feel' for cgs units. (except for Gauss :^)
George H.
No thanks. I'm not French. :)
You can't have a sense of humor, if you have no sense.
1 cm is iirc 1.12 pF, which is a nice handy size, but the Gaussian unit of inductance is seconds squared per cm, which is 9E11 henries. (That factor of c has to come in someplace.) We should call that unit the (vande)graaf, after something electrostatic that's more cool than useful. ;)
However, 20 attograafs per inch makes hookup wire sound much cooler, you have to admit. Monster Cable, are you listening?
Cheers
Phil Hobbs
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics
160 North State Road #203
Briarcliff Manor NY 10510
845-480-2058
hobbs at electrooptical dot net
http://electrooptical.net
Make that 20 zeptograafs. Cooler still.
Cheers
Phil Hobbs
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics
160 North State Road #203
Briarcliff Manor NY 10510
845-480-2058
hobbs at electrooptical dot net
http://electrooptical.net
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