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Topic: B&O CPL's (Read 1584 times) |
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signalman
TRAINing
Posts: 23
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I've heard from several sources over time that the top and bottom center and left markers on the B&O CPL's were white lamps while the two lamp indication for restricting on the main head were lunar.. Is there any thing to this or were they all lunar or all white?
Looking at B&O and NORAC rule books, the depictions of aspects using markers show a white circle as opposed to a gray/white circle for the restricting diagonal on the main head lamps.
Regards,
Hank
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Doug_Oaks
TRAINing
Posts: 18
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Hank,
You are correct. The markers are white and the upper left- lower right in the main signal head are lunar.
As a point of interest(or maybe not), there are three types of PL's on the ex-B&O or GM&O lines. The most common is the GRS model with round backs on the light units. Less common are the early ones which may be Hall or US&S(US&S bought Hall), indentified by short flat backs on the light units. Also not common are the more modern US&S models with a sloped back on the light units. All appear the same from the front.
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Chessie7549
TRAINing
Posts: 11
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Hank,
There is a difference in the color of the lunar white lights on the main mask and the white marker lights. The lunar lights have a blue filter and produce a ghostly white color. The marker lights above and below the main head do not use the blue filters. They have more of a cream like incandescent light color. Seems minor, but very noticable. I guess thats why the differentiated in the rule book.
Greg McCartney
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CG_Tower
Historian
Posts: 597
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on Dec 30th, 2003, 11:03pm, Chessie7549 wrote: (Click here for original message)Hank,
There is a difference in the color of the lunar white lights on the main mask and the white marker lights. The lunar lights have a blue filter and produce a ghostly white color. The marker lights above and below the main head do not use the blue filters. They have more of a cream like incandescent light color. Seems minor, but very noticable. I guess thats why the differentiated in the rule book.
Greg McCartney |
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Actually they are not filters per se, but glass lenses that appear blue upon sight, but when one shines a white light through them, they give off the ghostly (good term) hugh that you you described.
Very noticible indeed! Standing on a clear dark night one can see the high green indication for the siding at Ottawa nearly 6 miles away...the lunar display, also visible on this signal, is equally as striking.
Hank, if you get a chance, check out my CPL signal site, I am still working on it but there may be some info there that is helpful to you.
Eric
CG Tower
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| « Last Edit: Dec 30th, 2003, 11:24pm by CG_Tower » |
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CG Tower: http://www.cg-tower.com
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Chessie7549
TRAINing
Posts: 11
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Hank, would you happen to be the fellow who made the B&O CPLs for MSTS? If so, great work! I hope you don't mind, but I made a modification to the color of the white marker lights to give them the correct color on a route I downloaded from Trainsim site. I did not distribute the change to anyone.
Greg McCartney
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CHESSIEMIKE
Historian
Posts: 4305
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on Dec 31st, 2003, 1:15pm, Chessie7549 wrote: (Click here for original message)Hank, would you happen to be the fellow who made the B&O CPLs for MSTS? If so, great work! I hope you don't mind, but I made a modification to the color of the white marker lights to give them the correct color on a route I downloaded from Trainsim site. I did not distribute the change to anyone.
Greg McCartney |
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Would you mind posting a screan shot that shows your signals? I sure would like to see it. 
CHESSIEMIKE
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Remember that a lone amateur built the Ark. A large group of professionals built the Titanic.
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signalman
TRAINing
Posts: 23
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Thank you all for the CPL info. Here's a screen cap of some lower Quadrant semaphores I made for the MS train sim....
I post some other styles soon.
Hank
Click Image to Resize
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| « Last Edit: Jan 1st, 2004, 11:34pm by signalman » |
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signalman
TRAINing
Posts: 23
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Here's some MSTS constructs for searchlight, colorlight and positionlight styles......
Hank
Click Image to Resize
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signalman
TRAINing
Posts: 23
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Next....
Click Image to Resize
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signalman
TRAINing
Posts: 23
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Next....
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signalman
TRAINing
Posts: 23
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Last.
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signalman
TRAINing
Posts: 23
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Here's the B&O color positionlight style for MSTrainSim. The absolute version has the ability to show any of the six markers. I've also made the dwarf to show any of the marker arms, also.
Hank
Click Image to Resize
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CHESSIEMIKE
Historian
Posts: 4305
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Nice work Hank! Very 
CHESSIEMIKE
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Remember that a lone amateur built the Ark. A large group of professionals built the Titanic.
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eacsxt
Enthusiast
Posts: 29
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Some of the marker lights can also display yellow. A yellow marker light on the top right in combination with a green position light is an approach slow indication. A yellow marker light in the lower right in combination with a green position light is a medium approach slow indication.
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Passenger_Extra
Historian
Posts: 1284
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on Dec 19th, 2003, 11:58am, signalman wrote: (Click here for original message)I've heard from several sources over time that the top and bottom center and left markers on the B&O CPL's were white lamps while the two lamp indication for restricting on the main head were lunar.. Is there any thing to this or were they all lunar or all white?
Looking at B&O and NORAC rule books, the depictions of aspects using markers show a white circle as opposed to a gray/white circle for the restricting diagonal on the main head lamps.
Regards,
Hank |
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The lunar lights on the main head, as well as those little triangles were late adaptions. For years a right or left lunar green, or lunar yellow was the indication for diverging and diverging restricted on the B&O depending on the particular interlocking alignment. Center lunar green of course was a clear board or high green.
The difference between lunar and white is that the purple/blue filter on a lunar when illuminated by a headlight will reflect back as a pure white light.
The letter P indicated a distant signal and the G indicated a grade signal, per the usual definition.
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Not good on trains 1, 2, 5, 6, 25 & 26 west of Washington D.C. and trains 27 & 28.
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CG_Tower
Historian
Posts: 597
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The lunar lights on the main head, as well as those little triangles were late adaptions. For years a right or left lunar green, or lunar yellow was the indication for diverging and diverging restricted on the B&O depending on the particular interlocking alignment. Center lunar green of course was a clear board or high green.
The difference between lunar and white is that the purple/blue filter on a lunar when illuminated by a headlight will reflect back as a pure white light.
The letter P indicated a distant signal and the G indicated a grade signal, per the usual definition.
[/quote]
Actually, the headlight had nothing to do with the lunar white indication. The lense of the lunar white indication was actually blue, and when illuminated would glow blue-white, similar to the color of the moon on a clear night (hence the name "lunar white"). These signals are not pure white and when seen next to a white maker, you can see the difference. I will try to dig up a photo to show the difference.
CG
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CG Tower: http://www.cg-tower.com
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slwapprslw
TRAINing
Posts: 24
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Actually, the pilot lights usually have a Clear lense. I've seen a few to know first hand.
On some occasions, signal maintainers have been known to interchange the Lunar White and Clear lenses between the main head and the pilot lights. This causes much confusion on the proper white color.
The general rule is: Clear for pilot and Lunar White on the main head.
Cass Telles
"Slow-Approach-Slow" - 'Go by way of the B&O'
Railroads of NW Ohio
http://www.trainweb.org/rrnwoh
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Cass Telles - Webmaster
"Slow-Approach-Slow" - 'Go by way of the B&O'
Railroads of NW Ohio
www.trainweb.org/rrnwoh
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Reading2124
Historian
Posts: 1035
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Can you send me the site where you got this an can you send me som screen shots from gradecrossings.Railroad Crossings ECT
Thanks RDG2124
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O scale READING WEAVER CRUSADER FOR SALE...ENGINE #118 (4-6-2) streamlined engine and cars (5) 900 $...private message for more details
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