Branch signaling continued

[NW Mailing List]

Which Nauman was it that retired?

Ben Blevins
On Nov 9, 2013 7:04 AM, "NW Mailing List" <nw-mailing-list at nwhs.org> wrote:


>  Lynn,

> You are on to something but yet, still incorrect. Remember this is CTC

> territory, Not only to signals indicate switch positions but also track

> conditions and so forth.

>

> This said you need to remember that in figure 5 while YES the switch is

> lined for the branch BUT you have a train in the nearest block on the brach

> meaning the control point signal CANNOT display any signal more favorable

> then STOP or RESTRICTING.  This means that the signal one block back CANNOT

> display any signal more favorable then APPROACH.

>

> Now say the train on the branch is in the next block away from the control

> point, then you would get an DIVERGING APPROACH (Take diverging route

> prepared to stop at next signal, etc...) at the interlocking then at that

> time you would get APPROACH DIVERGING one block back. Why the difference?

> Simple.

>

>  The APPROACH DIVERGING only tells the engineer that he is taking a

> diverging route at the next signal so that he can bring his train down to

> the prescribed speed, but does not tell him to be prepared to stop.

>

> The APPROACH tells the engineer to be prepared to stop at the next signal,

> this said unless the train involved has this new magic ability to stop in a

> mater of inches, there is no real way that the train would be exceeding the

> diverging route speed when he gets to the interlocking as he is thinking he

> will be stopping. If he comes up the the control point and volia he now has

> a DIVERGING APPROACH or DIVERGING CLEAR then simply knock the breaks off,

> of ease off the dynamics and take the signal, otherwise if you get the

> STOP, well your stopping...

>

> Nathan

> PS Jimmy, the valley just isn't the same since you retired, and Nauman

> retired just last week.

> Ken, I'm in ham radio and have managed to run across a childhood friend of

> yours, Mark Bowers

>

> Nathan Simmonstrainman51 at gmail.comhttp://www.t-51.org

> KI4MSK

>

> On 11/7/2013 22:23, NW Mailing List wrote:

>

> for figure 5 the signal in question is about which way the switch is

> thrown, its not an advance signal, so we have differrent thoughts on this,

> well, its advance to the turnout, but neither indication is intepreted as

> an advance signal indication, that would be a signal previous.

>

> -Lynn-

>

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

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

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

> *Sent:* Thursday, November 07, 2013 9:30 PM

> *Subject:* Re: Branch signaling continued

>

>  Jim,

>

> I believe that in Figure 2 the signal just before leaving the branch

> should be a Diverging Clear (instead of Clear) showing that it will be

> taking a diverging route, observing authorized speed through the  turnout.

>

> In Figure 5, the Blue train should have an Approach signal prepared to

> stop at the next (RED) signal.

>

> Jeff Sanders

>

>

>  On Thursday, November 7, 2013 12:05 PM, NW Mailing List

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

>   Sorry once again for the long pause.  I have updated my first two

> diagrams based on the received feedback (please make sure I interpreted

> correctly), and have added a few more cases to examine.   Really need some

> help on Figure 5 as to whether the blue train would see approach or

> approach diverging.

>

>  [image: Inline image 1]

>

>

>  [image: Inline image 2]

>

>

>  [image: Inline image 3]

>

>

>  [image: Inline image 4]

>

>

>  [image: Inline image 5]

>

>  Thanks,

> Jim Cochran

>

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>

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>

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