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Post by melikepie on Jul 15, 2023 8:13:36 GMT
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Post by oe on Jul 15, 2023 13:56:29 GMT
Why not use the Graham road curve? Is it unsuitable for an Azuma?
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Post by 35b on Jul 15, 2023 16:47:53 GMT
Why not use the Graham road curve? Is it unsuitable for an Azuma? It used to be said that it was restricted to class 313 units. As they are ~20m vehicles with a tight loading gauged, and the Azuma is 26m vehicles with a fuller loading gauge, there could be some issues there! |
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Dom K
Global Moderator
The future is bright
Posts: 1,819 
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Post by Dom K on Jul 15, 2023 19:41:30 GMT
I’m no expert on the length of carriages but the cl378 and cl710 have used this curve. Would have been quite the photograph at the intermediate stations on the LO!
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rincew1nd
Administrator
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Post by rincew1nd on Jul 15, 2023 20:45:15 GMT
How did it get back?
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Post by bigvern on Jul 15, 2023 20:50:27 GMT
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Post by melikepie on Jul 15, 2023 21:02:46 GMT
That's not quite the same route. It looks like it did take the Graham Road Curve.
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cso
Posts: 1,043
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Post by cso on Jul 16, 2023 14:08:35 GMT
Maybe it can do that route in one direction but not the other? I assume the curvatures and clearances may be different in different directions...
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Post by 35b on Jul 16, 2023 20:53:56 GMT
Maybe it can do that route in one direction but not the other? I assume the curvatures and clearances may be different in different directions... It’s single track…. I suspect a test of one way in, the other out. |
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Post by Chris L on Jul 17, 2023 5:50:26 GMT
First time for a diesel into Liverpool Street in many years. |
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Post by d7666 on Jul 17, 2023 10:12:45 GMT
Graham Road curve is complexicated. IIRC whatever length limits that still exist (or ever existed in the first place) are not to do with car lengths, and more to do with EMU only under traction only and linked to a short track circuit on the spur itself between Navarino Rd Jn and Graham Rd Jn. Something to do with one track circuit and traction immunisation on either side. Or something of that ilk.
There was certainly no limit of 313 only - the current NR Anglia Sectional Appendix shows 313 315 317 319 321 322 345 357 378 permitted; ok some of those are gone now, the SA takes a while to catch up on detail like that. The route was routinely used for Ilford < > Hornsey empty EMU movements. It also had light engine 86s between Anglia and WCML.
SA also shows 170 and 222 permitted but no other diesel unit; there are no 80x of any flavour listed - but that might be part of the reason for testing.
When I did the Liverpool Street Leapfrog tour in 1992, they put some restriction on it: the 33 was only supposed to pull not push over that route, so the tour had to be back planned to ensure it was the right way round. On the day, one extra reversal was inserted to get round a points failure, and we ended up pushing anyway.
All esoteric detail none of which has anything to do with LU; nor does the entire thread ?
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