[PRCo] Re: Detroit__Control

[Jim Holland]

Good Morning!

> John F Bromley wrote:

> Sorry, sent response to the group -
> just noticed this was a personal message. 
> My apologies.

> Not Pittsburgh - Ivor runs the Boston Arborway line
> with a full subway including detailed stations and
> an amazing 4-car control system with a duplicate
> subway operation as far as "Heath St Loop" that
> allows, under proper care, a total of eight
> three-car trains to be in independent operation at
> different speeds on the same track at the same time. 
> Only one other 4-car system I know of,
> and that's the one Ivor built for Phil Spencer.

	Sounds like the  *Detroit--System*  of control which has been written up
in  *Traction--&--Models*  on various occasions.   Don't know if Basil
Motoligin was instrumental in its development or not, but believe he was a
big user of it.   Basil (I-F  I remember the name correctly) had a
beautiful "O"--Scale Detroit model system.
	Basically worked off diode control with 2-cars-(trains) using right-rail
for ground, 2-cars-(trains) using left-rail for ground thus the total of
4-car control.
	Would have to ferret out the articles for more details.

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James B. Holland

Holland  Electric  Railway  Operation....... 
___"O"--Scale St.-Petersburg Trams Company Trolleycars and...
______"O"--Scale  Parts  mailto:pghpcc at pacbell.net

______Pennsylvania Trolley Museum http://www.pa-trolley.org/
___Pittsburgh  Railways  Company  (PRCo),   1930  --  1950
N.M.R.A.  Life member #2190; http://www.nmra.org

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