Dave
I don't pretend to understand the electrical systems used on the Q equipment
but I've heard the term "field tap" applied to the practice of using the Motor
to supply power for two or three gallery cars. I am not sure that the
procedure involved special equipment; it may have been a option that was
available on all the units off of one of the main generators or the auxilary,
or, as you suggest, some units were modified to allow this use for weekends and
late night service where the power car would have been an extra unecessary
expense to operate.
Charlie Vlk
----- Original Message -----
From: clipperw@EarthLink.net
To: CBQ@yahoogroups.com
Sent: Tuesday, December 05, 2006 9:55 AM
Subject: [CBQ] Re: CB&Q Commuter Questions
Charlie,
That's what I recall also, but I wasn't sure of the details, so I
didn't comment of the air conditioning. I believe that Bob Campbell
knows the details of that portion of the system on the gallery cars.
Maybe he will comment on the details. The engine/generator system on
the power cars did not put out a tremendous amount of power. So,
lighting and mechanical equipment on nine cars was about all one
power car could operate. I am not sure whether the cars were 30 volt
or 74 volt DC. My guess is 30 v. since that is what the railroads
used in steam days and they simply continued with it. Since the E
units also worked main line trains, any decisions concerning the
suburban equipment had to be compatible. All the main line trains
were still steam heated and had various kinds of air conditioning or
none at all. I believe that most if not all of Q's E units had two
steam generators.
There were some E units that were set up to power the train
electrical load on weekend trains. They could power only two gallery
cars without the separate power car. I remember seeing such trains
occasionally. I believe that the E units supplied the power from the
auxiliary generator. On freight units in those days, the aux. gen.
would have had an output of 10 kw at 74 volts DC. On most steam
generator equipped locomotives, a larger auxiliary generator was
applied, rated at 18 kw. EMD also had a 24 kw machine and that may
have been what was applied to the specially equipped E's. (The
auxiliary generator's primary function on a diesel locomotive is to
provide low voltage power for lighting, switch gear, battery charging
and excitation of the main generator and companion alternator). When,
other demands are placed on the aux. generator, a larger one is often
needed.
Bill Barber
On Dec 5, 2006, at 9:20 AM, CBQ@yahoogroups.com wrote:
> Re: CB&Q Commuter Questions
>
> Posted by: "Charlie Vlk" cvlk@comcast.net ncbqguy
>
> Mon Dec 4, 2006 4:55 pm (PST)
>
> Bill-
> Excellent recap.
> AFAIK the Bilevels and Power Cars were Air Conditioned with
> Waukesha Ice Engines.... there were propane lockers under the cars.
> The Power Cars provided electricity for lighting and fans, etc..,
> not refrigeration.
> Charlie Vlk
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