From: James Shanks (n1vbn@bit-net.com)
Date: Mon Feb 16 2004 - 02:28:56 PST
I suspect a lot more air reservoir capacity than a Deuce or a 5 ton.
Biggest air compressor I've ever seen on a truck is the optional high
capacity design, on a Mack it's an inline 4 cylinder 35 cubic feet a minute
output compressor. That will even though it might seem small pump a lot of
air in a hurry, tanker company I worked for we used em to pump off liquid
loads in 7700 gallon tankers.
James Shanks
n1vbn@arrl.net
1998 IMZ 8.103
1984 HD FLHT-C
At 04:21 PM 2/15/2004, Bjorn Brandstedt wrote:
>Thanks, Ron for giving us some numbers as to the time it takes to
>deflate/inflate tires with the CTIS !
>I may be wrong, but based on the following calculations, it would take one
>heck of a compressor to inflate six tires from say 15 to 60 psi in 20 seconds.
>
>The 1100x20 tire has an approx volume of 5 cubic feet.
>At 60 psi (4x atmosphere) the amount of air in each tire is about 20 cubic
>feet.
>To go from 15 to 60 psi means pumping 15 cubic feet of air into each tire.
>
>Now, 6 x 15 = 90 cubic feet of air, total for all tires.
>
>The compressor on the old deuce puts out 7 cubic feet of air per minute at
>about 1,200 rpm and it would take almost 13 minutes to accomplish the task
>with it.
>
>To do the same in 20 seconds would require a compressor that can output
>270 cubic feet per minute, which sounds like an awful lot to me.
>
>Are the numbers mentioned by Ron accurate or are we talking minutes not
>seconds?
>
>Perhaps my numbers are all wrong, any comments?
>
>More input, please.
>
>Bjorn
>Meadows of Dan, Virginia
>
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