[PRCo] Re: 1138

[Boris Cefer]

I think that the entire list might have severe problems to understand Czech.
I would like, but I am not going to translate tons of paper.

Scoff too :-D

Well, the very first PCCs (100 and 1000s) had a very interesting feature
called "flashing". In the coast mode the traction motors were put across the
low-voltage battery (in addition to being in the spotting connection) to
ensure immediate braking current build-up when brake pedal was depressed.
This was found unnecessary probably within a very short period of service
and the flashing circuit was removed and an additional power cushioning
contactor and resistor installed, resembling the more recent 1100s.
There were also various different efforts to make the electrical equipment
less expensive to manufacture. A nice example was an attempt to eliminate
field shunts, but the result of experimenting was probably unsuccessful and
eventually the field shunts were reduced only in weight.

B

----- Original Message -----
From: "Derrick J Brashear" <shadow at dementia.org>
To: <pittsburgh-railways at dementia.org>
Sent: Wednesday, October 19, 2005 9:04 PM
Subject: [PRCo] Re: 1138


> On Wed, 19 Oct 2005, Boris Cefer wrote:
>
> > I have a Czech-written report from a guy who visited Pittsburgh in 1939
> > (!!!) to observe the modern PCC cars. Several pages of a white script on
a
> > black paper indicate that the 100, 1000s and 1100s were not electrically
> > identical, there were differences even between individual 1000s and
1100s
> > and the earlier cars had been already electrically rebuilt (in 1939) to
> > resemble some advantageous features of the 1100s. I don't want to bother
> > others with details. I can mention some of them off-list.
>
> So the stuff that would be on-topic for this list (Pittsburgh cars) should
> be offlist, but we're wildly off-topic onlist?
>
> Scoff.
>
> Derrick
>