Dwarf PLs... Derails

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If I'm not mistaken, the Arsenal switch diverges from the Westbound (Main 2) 
west of the east end of the siding.  It is my understanding that if there is 
a westbound train moving to the Main 1 (Eastbound main), eastbound 
movements, of course, have a Stop signal at the east end. With the eastbound 
signal set at Stop, the Arsenal switch is lined for the Arsenal, in effect, 
serving as a runaway track for any movement that might pass the Stop signal, 
thus avoiding a head-on collision. This has happened, and the derail works!

The Hayes type derail protects westward moves on the Arsenal track from 
fouling the Main line(s) in case of unauthorized westward movement.

Jeff Sanders

----- Original Message ----- 
From: <nw-mailing-list at nwhs.org>
To: "NW Mailing List" <nw-mailing-list at nwhs.org>
Sent: Monday, August 21, 2006 9:59 PM
Subject: Re: Dwarf PLs... Derails



> Interesting pictures, particularly the third one down.  I believe this is 

> the first time that I have see double derails at one location -- a switch 

> point derail to protect against eastward movements and a sliding, or 

> hinged, block derail (appears to be sliding block) to protect against 

> westward movements.  There are double throw block derails that will derail 

> in either direction, but the combination of derail types in this picture 

> is interesting.

>

> Gordon Hamilton

>

> ----- Original Message ----- 

> From: <nw-mailing-list at nwhs.org>

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

> Sent: Monday, August 21, 2006 5:16 PM

> Subject: RE: Dwarf PLs...

>

>

>> At 5:33 PM +0000 8/17/06, Robb wrote:

>>>

>>>There's one just just west of Radford at Cowan... protecting the arsenal 

>>>track.  The track has been long abandoned, but the dwarf is still lit to 

>>>this day.  I do not know what is on the other arsenal track at Pepper 

>>>(the one still in use)

>>

>> You mean this one?  Photos taken April 21, 2005, looking west toward 

>> Belspring and east into the Arsenal.  If they don't show up here, they 

>> are at the bottom of this page:

>> http://filebox.vt.edu/users/bharper/nwrwy/cowan.html

>>

>>

>>

>>

>>

>>

>> -- 

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>>

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