[AT] Pressure drop?

[Skip Cleveland]

What makes the guage needle move?
Skip
----- Original Message ----- 
From: "Francis Robinson" <robinson at svs.net>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Tuesday, January 29, 2008 11:04 PM
Subject: Re: [AT] Pressure drop?


>
>
> --On Tuesday, January 29, 2008 10:23 PM -0500 WF Smith <mogrits at gmail.com>
> wrote:
>
>> Is this a trick question? If there are no leaks the pressure will be
>> equal. Fluid pressure isn't like a voltage drop.
>>
>> Warren
>>
> &&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
>
>
>
> That was always my opinion but an engineer at a place I used to work said
> I was dead wrong and that he had charts that showed a drop amount even if
> the air was not moving... I don't know how good he was but they did use a
> gigantic amount of compressed air. There were hundreds of machines using
> that air and the compressor was a huge monster with a 10 foot dia. pulley.
> The air came into the plant I was in in several 3" lines and by the time 
> it
> got to the individual machines it was mostly down to 1/2" pipe or smaller
> except on the larger equipment. They used thousands of air cylinders from
> about 1"bore x 6" stroke up to about 4" bore x 24" stroke. Many of them
> cycled dozens of times a minute sounding like fire crackers. I have always
> blamed my hearing loss on the 5 years I worked there. Like I said I 
> thought
> he was wrong but he swore that if he put a pressure gauge on the line at
> the start and another on the end of the line that the gauge would show 
> drop
> even with no air moving... I quit arguing with him since he had the degree
> and the big paycheck and I was the dumb farm kid...   :-)   So I guess he
> was wrong and I was right after all?   :-)
>
> BTW, this line will be for operating several air nail guns (one at a
> time), a little spray finishing work and some general wood shop blow gun
> work so as long as I have 90 PSI while working that will do the job.
>
>
> --
> "farmer"
>
>
> Francis Robinson
> Central Indiana, USA
> Robinson at svs.net
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