>        Our system of 60 HZ line frequency may be based on a continuation
>of the concept of time with 60 minutes in an hour, 60 seconds in a minute,
>and 60 cycles per second.  It makes as much sense or as little sense as
>anything else.


As far as I know it was D.C. at first (Edison), and then Tesla had a lot to
do (and George Westinghouse I think) with showing that A.C. was better
because it could be transformed into high voltage/low current for lower
losses and farther distances.

In Ontario, Canada, the A.C. started out at 25 Hz, I believe. In the 50's
the electric utilities paid for new motors (or to have them rewound) and
transformers to do the big switch over to 60Hz.

I didn't look this up just now, so I could be wrong about it.

Ed Koffeman.
Kinetra
Brushless motor controls for R/C