[PRCo] Re: One Question & One Item For The List

[Herb Brannon]

Phillip,
I am making up a track diagram for my streetcar system. It will be a couple
days until I post it, however.
On Wed, Dec 12, 2012 at 9:40 AM, Phillip Clark Campbell <pcc_sr at yahoo.com>wrote:

> Very nice models Mr.Brannon.  Would you please provide a track plan?
> The dual overhead in this location seems pressed by the intersection
> and needs of operation.  In many or most cases where a DE terminal
> is a single track the car does not clear the signals until it changes
> ends and returns to the previous siding (there are exceptions.)  The
> stub track is the domain of one car until it completely clears.  While
> the IB track is not a siding for the 38A as this is the end of its line,
> it can be used that way.  If a PCC followed a DE car the DE car can
> clear the signals and allow the PCC to pass. If a DE car follows another,
> if the 2nd DE car gets a proceed, if a DE car is already at Clearview,
> then it takes the other track and changes ends there to return.  If it
> has layover time then it moves to the other track; if it does not lay over
> it is unclear how it activates the signals the other direction.
> This is a Bill Vigrass picture isn't it.  This does not make it any more
> clear:
> <http://www.davesrailpix.com/pitts/htm/bvp105.htm>
> In the larger photo you provided it is abundantly clear dual overhead is
> used; the nachod contactor is on one wire with another wire immediately
> adjacent.  As it is not used further, it is anchored to a line pole.
>
> <http://www.davesrailpix.com/pitts/htm/bvp081.htm>
>
> Again, this photo is not clear but the width of the hanger and what is
> apparent shows dual overhead.  The nachod contactor we see is in the
> overhead for 4322 so it shall clear the signal before across the points.
> After changing ends she passes thru contactors to protect the single
> track heading toward Castle Shannon.
>
> It still begs the question as to why dual overhead.  The contactors are
> bi-directional.  Putting them in one wire the car would clear the signals
> when arriving at Clearview and set them for protection upon leaving!
> Some special aspect of the signalling may apply.
>
> About 1950 only one car served the 38A except for rush hours when
> 2-cars were used.  The complication in the signals arises when some
> rail car uses the 38A and proceeds north beyond Clearview.
>
> This photo should give more evidence but shows the least doesn't it:
> <http://www.davesrailpix.com/pitts/htm/bvp083.htm>
>
> After the DE equipment was removed and only PCCs used the line in
> rush hours the overhead was changed from dual to single.
>
>
>
> Phil
>
>
>
>
>
> >________________________________
> > From: Herb Brannon <hrbran at cavtel.net>
> >To: Pittsburgh Railways Group <pittsburgh-railways at dementix.org>
> >Sent: Tuesday, December 11, 2012 11:51 PM
> >Subject: [PRCo] One Question & One Item For The List
> >
> >Question:::::
> >Take a look at the photo of Clearview Loop showing cars 4902 and 1206.
> This
> >photo is from "Transit In The Triangle" Page 142, and was taken on August
> >2, 1946. Look at the outbound track heading down toward the 38A
> >right-of-way then look above that track at the overhead wire(s). Does
> >anyone know why there is "dual-overhead" running down that track?
> >Item:::::
> >Just a photo or two of my HO trolley layout which is under construction
> and
> >has a long, long, long way to go yet before it will be complete. It is
> >strictly my own design and will showcase what could have been if a more
> >progressive attitude toward public transit had prevailed in the PCC era.
> >You will note a PRCo/PATransit 1700-series PCC crossing the street in
> front
> >of a GMC TDH4110. The fleet colors (orange/cream/red trim) I selected
> >inasmuch as they were the colors of the old Akron Transportation Company
> >streetcars, trolley coaches and buses back in "the day". I have a lot of
> >work to do on this layout and have actually stopped work on it pending my
> >moving back to the Pittsburgh area. Hopefully I can get it done before I
> >die.
> >
> >I am interested in why there was dual overhead on that stretch of track at
> >Clearview Loop.
> >
> >--
> >Herb Brannon
> >In Cuyahoga Valley National Park
> >
> >
> >
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>
>


-- 
Herb Brannon
In Cuyahoga Valley National Park