Signals

[NW Mailing List]

a good book to get is the Compendium of Signals by Roger Karl.

a Y signal set on one side of the tracks, when facing the signals 
observing the aspects...
the right most is for the right track, the left most for the left track. 
Its just like if it were on a bridge over the track but stuck to the 
side of the tracks instead of having the signals braced over the tracks 
engineer side viewing.

Again the treatment of position lights and Color position lights in 
making aspects is very differrent.

But I don't know if for today they decided to treat CPL signals like 
your normal color light signals with multiple heads.

Anyways, any signal heads on the same mast are meant for the same track, 
not separate tracks, and should usually display an aspect that has a 
specific meaning, so say its red over green can usually mean you will be 
taking a diverging route on the switch or proceed at a specific speed 
(and or both)

Anyways with all these multiple heads on one mast and can be up to 3 
heads (at least color lights) they can clue the path the train is going 
to take thru a series of turnouts.

so G/R, take main (top head shows main clear, bottom head shows 
diverging not possible, turnout straight)
R/G take siding  (top head shows main not possible, because your 
diverging thru the switch to another track)

But CPL's in the book is different than the standard color light 
treatment or position light treatment, they use extra lunar white lights 
at specific locations to create the aspects for your
interpretation.

N&W uses position lights originally and NS seems to be changing over 
here and there to CPL.
So whatever your modeling period you should find what signal style to 
use for your layout.

but a quick check on my links is this...

http://www.railroadsignals.us/signals/nwcpl/NWCPLaspects.jpg

thats the color position lights they later used.

heres the main link for other railroads.

http://www.railroadsignals.us/rulebooks/rulebooks.htm

for the N&W Position light, just use the Pennsy version, as you know 
Pennsy had stock in the N&W.

http://www.railroadsignals.us/rulebooks/prr56/index.htm

I seem to recall this, say at the end of double track to single, say you 
are on the siding, your signal will still have 2 heads, the top head 
will show a permanent red while the bottom head will show an aspect 
whether to clear your train or not. For a color light it would be R/R 
full stop, R/G to move onto the main over the turnout. Position light as 
sen in the above link, you could have 2 red lights on top, then 3 yellow 
lights in some configuration below. Full stop the  lower yellow lights 
would not be lit, when on allows the train to move to the main, CPL 
would be fairly similar.

signals are fun, eh...

-Lynn-







On 8/13/2013 8:15 PM, nw-mailing-list-request at nwhs.org wrote:

> Subject:

> Signals

> From:

> NW Mailing List <nw-mailing-list at nwhs.org>

> Date:

> 8/13/2013 4:07 PM

>

> To:

> "nw-mailing-list at nwhs.org" <nw-mailing-list at nwhs.org>

>

>

> I would like to thank the contributors of the signal discussions.  I 

> am mystified but less so now.  Here are some thoughts I have:

> 1)  Two CPL heads on the same post over each other--are they combined 

> into one "aspect"  like (making this up...)  Red over yellow means X 

> and green over yellow means Y or are they independent

> as in red up top means main line stop but yellow means diverging has 

> train two blocks ahead?

> 2) 4 CPL heads on the Y post...double track main with 

> crossover...first of all, is that what signal design you would see?  

> Second, right side is green over red (again making up some aspect) is 

> that a combo or do they refer to the two different tracks...

> I have trouble with the signal books in NWHS--I see the signals but 

> have no idea what the track plan would look like beside the signal.

> I ache to have signals on my N&W Guyandotte Division but I am not sure 

> what goes where. Right now my signalling is, "Hey, ya'll, watch out 

> over there...!  The beauty of a small layout...

> I don't know if anyone can make sense of this or make me understand 

> signalling on the N&W. You are welcome to try.  I know simple answers 

> and signals don't go together.

> I guess the upside is maybe nobody could criticize my layout 'cause 

> nobody knows either!

> Love you all,

> Mike Shockley

> N&W Guyandotte Division (dark)


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