What are the yellow fittings please

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What are the yellow fittings please

This topic has 23 replies, 18 voices, and was last updated 23 February 2022 at 11:33 by Journeyman.

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29 January 2022 at 12:34 #36723
Former Member
Participant
@formermember12892
What are the yellow fittings please
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29 January 2022 at 12:34 #582907
Former Member
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@formermember12892
[This posting has been removed]
29 January 2022 at 12:39 #582908
John Rutzen
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@johnrutzen76569
Cat's eyes? So you can see where you are going in the fog?
29 January 2022 at 12:50 #582909
Martin Connelly
Participant
@martinconnelly55370
Lateral resistance plates. They are on the sleepers on the bend to stop fast trains pushing the sleepers towards the outside of the bend.

Trackwork LRP Central Fitment – Imtram

Martin C
29 January 2022 at 13:49 #582914
Former Member
Participant
@formermember12892
[This posting has been removed]
29 January 2022 at 18:38 #582945
old mart
Participant
@oldmart
Looking at the rail surface, they are either very new, or the line is very little used.
29 January 2022 at 20:54 #582959
Tim Stevens
Participant
@timstevens64731
Surely, they are there to bolt the electric rail to, if ever there is enough current to support it.

Tim
29 January 2022 at 21:42 #582966
Nicholas Farr
Participant
@nicholasfarr14254
Hi Tim Stevens, just expanding Martin's link Lateral Resistance

Regards Nick.
29 January 2022 at 23:26 #582980
V8Eng
Participant
@v8eng
Having seen the speed that some modern trains travel through bends at I do not find it surprising that devices like that are needed!

Edited By V8Eng on 29/01/2022 23:26:48
30 January 2022 at 09:25 #583002
Mick B1
Participant
@mickb1
Posted by Tim Stevens on 29/01/2022 20:54:29:

Surely, they are there to bolt the electric rail to, if ever there is enough current to support it.

Tim

Ah, so those flat pickup shoes under old Hornby and Marklin locos are scale reproductions?

I always wondered…
30 January 2022 at 09:38 #583007
Mike Hurley
Participant
@mikehurley60381
See the company that markets them is Australian.

Nothing against those lovely people, but isn't it a bit sad that we can't make a fairly simple bit of welded up steel in this country – and save many sea miles of transporting them?

Anway, surely hammering in one simple much longer, wider pointed piece of steel (like a broad sword) against the outer edge of the sleepers would have much the same effect – or am I being too simplistic ( KISS ) ?

regards, Mike
30 January 2022 at 12:33 #583070
Perko7
Participant
@perko7
I think the key term is resistance. There still needs to be some movement available to allow the track to adjust to temperature variations. If the outer ends of the sleepers were rigidly restrained then the straight track leading into the curve could buckle at high temperatures. In the days of short rail sections with bolted fishplates there was enough movement in each joint to adjust to temperature variations, but with continuously welded rail that is not possible.
30 January 2022 at 15:36 #583112
old mart
Participant
@oldmart
Strange coincidence, I have a book from the library, Branch line to Minehead, by Vic Mitchell and Keith Smith which mentions this. Plate 49 shows a train on a single track curve near Doniford Bridge Halt. There is mention of "concrete monuments (short posts spaced about 20 feet apart on the inside of the curve) at the ballast shoulder helped staff to return the track to its correct position after speeding trains moved it towards the sea". Not exactly a high speed line, either.
30 January 2022 at 19:10 #583172
Bazyle
Participant
@bazyle
When you think about the construction of Brunel's broad gauge track it wouldn't have suffered from this. Another tick in the box for that man,

Vintage Gauge 1 enthusiasts will of course have recognised it as stud contact track (modernised).
30 January 2022 at 23:56 #583216
duncan webster 1
Participant
@duncanwebster1
Posted by Bazyle on 30/01/2022 19:10:48:

When you think about the construction of Brunel's broad gauge track it wouldn't have suffered from this. Another tick in the box for that man,

But it gave a very rough ride and had to be ripped out and replaced with conventional sleepers. He didn't get everything right
1 February 2022 at 12:27 #583448
Vadim Cristea
Participant
@vadimcristea95996
never saw them before, and I never thought those can be used that way
1 February 2022 at 15:21 #583469
Journeyman
Participant
@journeyman
Posted by Mike Hurley on 30/01/2022 09:38:57:

See the company that markets them is Australian.

Nothing against those lovely people, but isn't it a bit sad that we can't make a fairly simple bit of welded up steel in this country – and save many sea miles of transporting them?

Anway, surely hammering in one simple much longer, wider pointed piece of steel (like a broad sword) against the outer edge of the sleepers would have much the same effect – or am I being too simplistic ( KISS ) ?

regards, Mike

They are probably from here – Trackwork Doncaster UK

John
20 February 2022 at 20:46 #586488
Nigel Graham 2
Participant
@nigelgraham2
Re the comments on conductor rails.

London Underground apart, it's only the ex- Southern Railway / BR Southern Region lines that use third-rail electrification; and the conductor rail is outside of the running rails, not between them. It is mounted on inverted-cup ceramic insulators, and partially shrouded by parallel boards.

(I know 'cos I live at the Dorset end of the Weymouth – London (Waterloo) via Poole and Southampton, line; their furthest extent of electric operation. The same company's / region's Exeter – Waterloo route via Yeovil Jcn & Salisbury was never electrified.)

I don't know where the Tube's third rail is situated w.r.t the running rails.

'

The photographed track looks very new, which could explain the rusty appearance. I suggest it's replacement work that's not yet carried enough trains to become polished.

Edited By Nigel Graham 2 on 20/02/2022 20:50:10
21 February 2022 at 08:02 #586528
V8Eng
Participant
@v8eng
Posted by Nigel Graham 2 on 20/02/2022 20:46:17:

Re the comments on conductor rails.

London Underground apart, it's only the ex- Southern Railway / BR Southern Region lines that use third-rail electrification; and the conductor rail is outside of the running rails, not between them. It is mounted on inverted-cup ceramic insulators, and partially shrouded by parallel boards.

(I know 'cos I live at the Dorset end of the Weymouth – London (Waterloo) via Poole and Southampton, line; their furthest extent of electric operation. The same company's / region's Exeter – Waterloo route via Yeovil Jcn & Salisbury was never electrified.)

I don't know where the Tube's third rail is situated w.r.t the running rails.

'

The photographed track looks very new, which could explain the rusty appearance. I suggest it's replacement work that's not yet carried enough trains to become polished.

Edited By Nigel Graham 2 on 20/02/2022 20:50:10

The London Underground is a 4 rail system with (I think) one conductor rail in the running track centre with the other one beside the running track, the conductor rails are mounted on insulators.

I do not know which conductor rail has what function though.

Hope that makes sense.

Edited By V8Eng on 21/02/2022 08:08:56
21 February 2022 at 08:17 #586531
Frances IoM
Participant
@francesiom58905
the outside track is power compatible with the national rail 3rd rail systems that share the track in many places, the inner rail is a return as LT run a very dense service and this allows more trains/section whereas in the non-LT 3rd system return is via the running rails
21 February 2022 at 08:54 #586545
Martin Connelly
Participant
@martinconnelly55370
Merseyrail use the third rail outside of the running rail system.

Martin C
22 February 2022 at 01:26 #586685
John Olsen
Participant
@johnolsen79199
I noticed in Switzerland a couple of years back that on some curves the sleepers are laid at an alternating angle, so that one end of each is adjacent to the next sleeper. Like this VVVVVVV instead of this I I I I I I I. Presumably this is also for lateral resistance as it generally seems to be on curves..

Some of the Swiss lines also have an extra rail down the middle, with gear teeth cut in it…..

John
23 February 2022 at 07:24 #586842
Howard Lewis
Participant
@howardlewis46836
The Swiss, and other railways, use racks on sections that are too steeply graded for adhesion only.

There was quite a "Clonk" as the pinion on the loco engaged with the rack, when a train came along as I stood near to the start of a rack section.

Some of the narrow gauge lines use a slightly different system, where the "rack" is not a gear type rack, but more like a narrow ladder laid in the centre of the track. Think that this is called the Richenbach system

There was another system, the Fell system, use din New Zealand, I think, where two horizontal wheels gripped a central rail to provide additional traction on gradients. It could also be used for additional braking on descents.

Howard
23 February 2022 at 11:33 #586879
Journeyman
Participant
@journeyman
As we have drifted off-topic somewhat here are a few image for things in the centre of tracks:

Track at Városkút on a line that meanders from Városmajor to Széchenyi-hegy in the Buda Hills, Budapest, Hungary. This is a rack railway and quite steep in places.

Close-up of the rack.

Somewhat fuzzy image of the train.

Link to a YouTube video

Link to Wikipedia page

John

Edit: Add Links

Edited By Journeyman on 23/02/2022 11:42:00
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