[PRCo] Re: Nachod Signals

[Edward H. Lybarger]

At PTM, Nachod signals are considered chromatic ornamentations, as Fred
likes to call colored lights.  They are extremely unreliable, just as the
were in the latter days of operation on 38A, for example.  The contactors
are very touchy...they prefer current collection devices of a constant
width, so when mix our standard wheels with a handful of shoes (as on two of
the Red Arrow cars) we get inconsistent chromatic renderings.  As I've said
before, this is why we dispatch by radio, not lights.

-----Original Message-----
From: pittsburgh-railways-bounce at lists.dementia.org
[mailto:pittsburgh-railways-bounce at lists.dementia.org]On Behalf Of Bob
Dietrich
Sent: Monday, January 01, 2007 12:07 PM
To: pittsburgh-railways at dementia.org
Subject: [PRCo] Nachod Signals


I remember not too long ago a discussion of signaling on this list; at least
I think it was this list.  Anyway, the current issue of Trolley Talk -
#283,September-October 2006 - has a very good explanation of the Nachod
system with references to a couple other systems as well.  If you are like
me, ignorant of such topics, this is an informative article.

Bob