[PRCo] Re: Cleveland_--_Shaker

[Boris Cefer]

It is obsolete, but well proven. It has been in service all over the world
for more than 70 years and there is not much to improve on it. It reached
the perfect phase of development many years back while all the modern
semiconductor propulsion systems have relatively short career and they age
far more rapidly, being pushed out by a new design almost every day.

B

----- Original Message -----
From: "Fred Schneider" <fwschneider at comcast.net>
To: <pittsburgh-railways at dementia.org>
Sent: Friday, February 02, 2007 7:01 PM
Subject: [PRCo] Re: Cleveland_--_Shaker


> Those motors have not be made in years.  Just because New York City
> has always specified obsolete technology doesn't been the rest of the
> industry is so far behind the curve.  The New York City Transit
> Authority has always had a reputation for buying obsolete hardware.
> I would say that DC motors are rapidly being pushed out of the
> business by AC motor because the AC motors require very limited
> maintenance but I would need to get someone else to tabulate the
> numbers for me.
>
> But my point was the entire PCC control package is obsolete technology.
>