[PRCo] Re: PRCo__Interurbans

[Fred Schneider]

6 or 6 kw heaters or total current consumption?  What would be a normal 
energy requirement to bring an uninsulated 45-foot car from 20 degrees 
to 50 degrees?
Now lets take that a step farther ... were the Russian cars insulated?  
How about the Czech cars?  Were the windows glazed with two sheets of 
glass with an air space between? 

This also varied considerably in the United States.  I've never known of 
double-glazing of trolleys in our area and farther south.  Minneapolis, 
on the other hand, did have "storm sash" for their cars.  I think 
Montreal might have also.  The far norther cities might have also found 
it practical to install interior sheeting and insulation.  West Penn 
832, as an example, had cork insulation which absorbed water and rusted 
the body from the inside out.   But I've never surveyed in any manner 
how prevalent insulation was.  I simply know there were differences. 

Boris Cefer wrote:

>Each of us is an original sample in question of comfort. But,......
>An example. The Tatra T3 cars (exactly T3 SU) with totally enclosed motorman
>cab delivered to many Russian countries have 6 kW cab's heater with blower
>to provide adequate efficiency. At temperatures around 15 F the motorman
>does not need to sport any heavy coat, even he is sitting for about 9 hours
>and has only very low exercise behind the controls. Now, compare the area of
>the cab with the rest of the car's interior. And remember the people usually
>are well dressed under such conditions.
>Most T3s in our city have 6.6 kW interior heaters only, which provides
>capacity enough to defrost the car under similar conditions and the interior
>is quite acceptable.
>Another aspect is that the difference between the exterior and the interior
>temperatures should not be too big from health reasons.
>
>B
>
>----- Original Message -----
>From: "Fred Schneider" <fschnei at supernet.com>
>To: <pittsburgh-railways at dementia.org>
>Sent: Saturday, October 16, 2004 4:33 PM
>Subject: [PRCo] Re: PRCo__Interurbans
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>>Interesting.   20 kw versus 10 kw.  But my background is insufficient to
>>tell me what this means in terms of comfort.  But it does say that
>>someone thought about the problem up front ... PRC's engineering staff
>>was not totally oblivious to the different demands of city and
>>interurban service.
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