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| NP Cantilever Signal Retirement https://www.rypn.org/forums/viewtopic.php?f=1&t=39196 |
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| Author: | softwerkslex [ Fri Mar 11, 2016 4:57 pm ] |
| Post subject: | NP Cantilever Signal Retirement |
You may have seen this news item today http://trn.trains.com/news/news-wire/2016/03/11-last-np-cantilever-signal-in-minnesota-removed-from-service Questions: Why are the new signals at a much lower height than the old signals? The new signals are no longer facing the engineer side. One signal will be on the right side of the tracks and one will be on the left side. I assume both signals will still point in the same direction as the cantilever. |
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| Author: | Train Detainer [ Fri Mar 11, 2016 5:14 pm ] |
| Post subject: | Re: NP Cantilever Signal Retirement |
Simply a matter of sight lines. With signals for both tracks on one mast (the cantilever) the heads had to be high enough that crews on the left track (facing the signals) could see them over the top of a train on the right track. The cantilever arm provided horizontal separation to distinguish which signal is for which track. In both cases, providing clearly distinguishable aspects at as great a distance as possible is the goal. Whether a signal is on the right or left side of the track it protects makes no difference, as long as it is clear which track it protects. |
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| Author: | Les Beckman [ Fri Mar 11, 2016 5:35 pm ] |
| Post subject: | Re: NP Cantilever Signal Retirement |
The BIG question is, did any museum save the NP cantilever and two searchlight signals? We'd like a cantilever here at HVRM, but a long way from Minnesota. Hopefully one of the museums up there preserved this cantilever, or perhaps one that came down a bit earlier. Les |
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| Author: | PMC [ Fri Mar 11, 2016 6:18 pm ] |
| Post subject: | Re: NP Cantilever Signal Retirement |
The one cantilever that I know about being saved is an ex-Santa Fe on Niles Canyon Railway: http://www.ncrysignal.com/projects/signal-bridge |
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