[PRCo] Re: Pittsburgh 1200 models

[Boris Cefer]

I can't stay cold, but I will try.
When it comes on PCC equipment, you know, I can't stay quiet, but I can
hardly discover something new, so I don't pronounce any new info requests.

B

----- Original Message -----
From: "Fred Schneider" <fwschneider at comcast.net>
To: <pittsburgh-railways at dementia.org>
Sent: Monday, April 03, 2006 8:00 PM
Subject: [PRCo] Re: Pittsburgh 1200 models


> I have a list somewhere ... probably filed away at PTM to get it out
> of here...that listed all the brake variants on Pittsburgh PCC
> cars.   If the 1200s had conventional dynamics and spring-applied air-
> release tread brake shoes, it would have been logical to have some
> very heavy springs to apply those shoes  and use the air to graduate
> the release of the brakes.
>
> I have a recollection that they rewired a lot of cars for extended
> dynamic brakes and they might have done that to 1200s.   That would
> create a whole new ball came, so to speak.   You wouldn't need the
> same force to apply brakes.  Just enough to hold the car.   And you
> wouldn't need to graduate the release because you would not have time
> to do it because the brakes wouldn't come on until you're down to 1 mph.
>
> If Ed can find the page in all the PCC back up crap......
>
> On Apr 3, 2006, at 3:32 AM, Holland Electric Rwy. Op. H.E.R.O. --
> Import SPTC 1.48 Models // James B. Holland wrote:
>
> > One would assume brakes were good upon purchase  --  experience
> > with 10s
> > and 11s was probably quite positive but experience with 12s may have
> > taught otherwise.       At delivery, 1200 series PCCs wheel tread
> > brake
> > shoes were   <Spring__Applied>   Air--Released    ----    opposite of
> > the Standard Of The Day!       To release the brakes for a Push / Tow
> > job it was necessary to climb partway under the car    ----    that
> > also
> > helped to ban the cars on lines with steeper grades.
> >
>
>