[PRCo] Re: Pittsburgh 1200s

[Holland Electric Rwy. Op. H.E.R.O. -- Import SPTC 1.48 Models // James B. Holland]

Holland Electric Rwy. Op. H.E.R.O. -- Import SPTC 1.48 Models // James 
B. Holland wrote:
.

> The B3 is basically a spring applied // Electrically released drum  
> (air release on PRCo 1601-series Interurbans)    ----    Maybe That Is 
> The Reason that the first two sets of Eggsperimental  B3  trucks were 
> tried under the 1200s  which were spring applied as well    ----    
> here is 1225 sporting those trucks:::   
> http://206.103.49.193/pitts/htm/jfp073.htm 

.
Actually, musing about this comment now and I realize the reason that 
the 1200s were chosen for the Experimental B3 test is that They Were The 
Newest PCCs on the PRCo system    ----    just coincidental that the 
braking system operated like All-Electrics!
.
Very Interesting that  SLPS  1500--1599  were ordered two months earlier 
than  PRCo  1200--1299    ----    body style of the two cars All But 
Identical right down to trolley cowl  (Including Paint!!)    ----    
SLPS had the strange looking front end.       SLPS  was the Rolling 
Laboratory for All-Electric PCC Equipment and these cars were 
All-Electric  (in 1940)  and thus utilized Spring Applied // 
Electrically Released friction Drum brakes while PRCo 1200s used Spring 
Applied // Air Released friction Tread brakes.       As mentioned 
earlier, such friction Drum brakes on All-Electrics couldn't handle 
grades over 4.8% but this was rectified with time, experience, and research.




Jim__Holland


I__Like__Ike.......And__PCCs!!

down with pantographs ---- UP___WITH___TROLLEYPOLES!!!!!!!