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#11
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Ken Wheatley wrote in message . ..
On 7 Nov 2004 12:27:55 -0800, (TheOneKEA) wrote: I was talking to someone else who stated that a platform at Epping was still vapourware; to make up for this, the group has a rather nice RTL-class Routemaster, painted British racing green and bearing the code RTL1256, which they intend to run between Epping LU and North Weald for onward connections. Good post. However an RTL is an RTL - not as Routemaster. And presumably 'British racing green' is London Transport buses country area livery? I don't know a bloody thing about buses, so I will take your word for it ;-) Bus aficionados will really like it; it's in amazingly good condition and looks excellent on the inside. |
#13
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In article ,
Mark Brader wrote: Interestingly, the old two-aspect station starter and single-aspect inner home at Ongar are still extant ... What's a single-aspect signal? A signal with only one aspect. Sigh. Okay. What *use* is a single-aspect signal? Fixed distant, or fixed stop signal. Not what I'd expect to find doing an inner home job, though ... Nick -- http://www.leverton.org/ ... So express yourself ... |
#14
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David Splett wrote:
"TheOneKEA" wrote in message om... I looked at the signalling diagram for the LW and LX sites and it makes no mention of a west-facing single-aspect signal at Ongar; only LX21, the two-aspect station starter, and an FRL, are shown. Does anyone have any more information? The signal approaching Ongar was a fixed yellow, designed to act as a repeater for the red lamps at the end of the line. This arrangements was/is not unique on LU - I think there is a fixed yellow approaching Chesham, and also most tunnel sidings have sequences of them. Most are un-numbered, however the one at Ongar was unique in that it's ident was "ONGAR". I would guess it was installed as part of the post-Moorgate enhancements. Most termini would have the last signal held at red until the train was proved to have slowed, but presumably other arrangements were necessary at Ongar because there weren't any approach signals. Obviously the yellow isn't going to stop a fast-approaching train, but it would provide protection at night if a driver couldn't see the landmarks where he had to start braking for the terminus. This signal had a trip thing that went down a certain time after the train has passed the signal - it was away from the signal. If the train was approaching too quickly the trip thing would of still been up and set of the brakes. |
#15
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Mark Brader:
Sigh. Okay. What *use* is a single-aspect signal? Nick Leverton: Fixed distant, or fixed stop signal. Oh, of course. -- Mark Brader | (Monosyllables being forbidden to doctors of philosophy, Toronto | such truths are called "invariants" in the trade.) | -- Jeff Prothero |
#16
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James Looker wrote in message ...
David Splett wrote: The signal approaching Ongar was a fixed yellow, designed to act as a repeater for the red lamps at the end of the line. This arrangements was/is not unique on LU - I think there is a fixed yellow approaching Chesham, and also most tunnel sidings have sequences of them. Most are un-numbered, however the one at Ongar was unique in that it's ident was "ONGAR". I would guess it was installed as part of the post-Moorgate enhancements. Most termini would have the last signal held at red until the train was proved to have slowed, but presumably other arrangements were necessary at Ongar because there weren't any approach signals. Obviously the yellow isn't going to stop a fast-approaching train, but it would provide protection at night if a driver couldn't see the landmarks where he had to start braking for the terminus. This signal had a trip thing that went down a certain time after the train has passed the signal - it was away from the signal. If the train was approaching too quickly the trip thing would of still been up and set of the brakes. Sounds like an approach-controlled trainstop, to prove the train is at the proper low speed before allowing it access to the platform. |
#17
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TheOneKEA wrote:
James Looker wrote in message ... David Splett wrote: The signal approaching Ongar was a fixed yellow, designed to act as a repeater for the red lamps at the end of the line. This arrangements was/is not unique on LU - I think there is a fixed yellow approaching Chesham, and also most tunnel sidings have sequences of them. Most are un-numbered, however the one at Ongar was unique in that it's ident was "ONGAR". I would guess it was installed as part of the post-Moorgate enhancements. Most termini would have the last signal held at red until the train was proved to have slowed, but presumably other arrangements were necessary at Ongar because there weren't any approach signals. Obviously the yellow isn't going to stop a fast-approaching train, but it would provide protection at night if a driver couldn't see the landmarks where he had to start braking for the terminus. This signal had a trip thing that went down a certain time after the train has passed the signal - it was away from the signal. If the train was approaching too quickly the trip thing would of still been up and set of the brakes. Sounds like an approach-controlled trainstop, to prove the train is at the proper low speed before allowing it access to the platform. Agreed, or a trip thing as I like to call it. |
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