Air Brakes today?

[Cra...@nevermind.com]

While trying to clean up and jettison some old stuff in the basement,
my son and I discovered an old VHS tape called "The Evolution of the
Air Brake" by WABCO, (Westinghouse air brake Company). We were able to
dig out a functioning VHS player and watched it. Not bad.

At the end they showed what seemed to be a solid state controller that
was driving the air system. It used a laptop to troubleshoot and
identify defective components.

My son thought all this was very quaint and old fashioned, but
wondered if air was still used. I believe it is still used as a power
medium for breaking, but is there a pneumatic think like a "triple
valve" for control still used, or is it now completely electric?

Anyone know of a newer video or a web page on the subject?

Thanks, Jon
Rags make paper

Paper makes money

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Loans make beggars

Beggars make rags.