Paul,
Since you mentioned compressed air powered trams, did you know that
several mines used a system to compress the air that had no moving
parts? A really ingenious system. Here's how they produced 125 psi
for "free." I know of a mine in the U.P. of Michigan (Victoria) that
used this system too.
http://www.cobalt.ca/ragged_chutes.htm
Tim
At 12:43 PM 5/31/2007, Paul Asgeirsson wrote:
>Interesting!
>
>Old technology always seems to reappear!! In mines, compressed air
>locomotive were commonly used before the electric ones came into being.
>Compressed air was always available in the tunnels so there wasn't a problem
>on "Refueling" when they ran out of or low on air.
>
>Again, even then, it was a trade of fossil fuels for the compressed air,
>just as the new cars from India will be doing.
>
>Paul A
Tim Collins
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