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Locomotive Services Fleet (LSL) updates

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The Prisoner

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22 Aug 2012
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420
Just had an email from LSL offering a free rerun of the Avocet Achievement on Wednesday 7th October or a full refund. Bravo LSL/Intercity
 
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neil65

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15 Jul 2022
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Location
Huddersfield, Kirklees, United Kingdom
89001 Avocet yesterday at Crewe before its failure at Warrington
railway-photography.smugmug.com

89001 Avocet 'The Avocet Achievement' at Crewe. Plus 3 hours at Stafford Station - Railway-Photography

railway photographs from the last 100 years
railway-photography.smugmug.com railway-photography.smugmug.com
railway-photography.smugmug.com

89001 Avocet 'The Avocet Achievement' at Crewe. Plus 3 hours at Stafford Station - Railway-Photography

railway photographs from the last 100 years
railway-photography.smugmug.com railway-photography.smugmug.com
railway-photography.smugmug.com

89001 Avocet 'The Avocet Achievement' at Crewe. Plus 3 hours at Stafford Station - Railway-Photography

railway photographs from the last 100 years
railway-photography.smugmug.com railway-photography.smugmug.com

Neil
 
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Paul AC

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3 Aug 2025
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237
Location
Timperley
Nym said:
If LSL have made it work like that.
Click to expand...
It's not really anything to do with LSL as such; any unpowered "AC Loco TDM" fitted vehicle (loco or DVT/DBSO) must "pass through" the two TDM circuit wires from one end of the vehicle to the other. It does this via normally-closed Line Closing Relays (LCRs) in the TDM Rack.

The TDM Rack in the Master vehicle in the formation (the one with the driving key inserted and turned) opens all the LCRs by sending out a burst of carrier wave, then messages the next nearest TDM rack in each direction to confirm if a TDM-fitted vehicle is there. If there is one, it gets configured as a Slave, then it closes its own LCR; the Master then searches for another Slave etc etc. In this way any combination of vehicles can be "configured" in front of and behind any driving cab; and each one knows which way is 'forward'/'reverse'. Any unpowered TDM-fitted vehicle is ignored. Configuration usually takes less than one second.

Any combination will configure, though of course many combinations are inadmissible for overhead current draw or other operational reasons.

So, DVT 82139 could technically have controlled 90001 via the dead 89001, but as I understand it there are operational reasons for not doing so.
 
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norbitonflyer

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SW London
Paul AC said:
The TDM Rack in the Master vehicle in the formation (the one with the driving key inserted and turned) opens all the LCRs by sending out a burst of carrier wave, then messages the next nearest TDM rack in each direction to confirm if a TDM-fitted vehicle is there. If there is one, it gets configured as a Slave, then it closes its own LCR; the Master then searches for another Slave etc etc.
Click to expand...
Would the LCRs function properly on 89001 if, as reported, it had a failed battery charger and was therefore electrically dead ?
 
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RichardAsh1981

Member
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28 Oct 2017
Messages
251
norbitonflyer said:
Would the LCRs function properly on 89001 if, as reported, it had a failed battery charger and was therefore electrically dead ?
Click to expand...

Paul AC said:
any unpowered "AC Loco TDM" fitted vehicle (loco or DVT/DBSO) must "pass through" the two TDM circuit wires from one end of the vehicle to the other. It does this via normally-closed Line Closing Relays (LCRs) in the TDM Rack.
Click to expand...

So the answer is yes, that is what "normally-closed" means here: if there is no power to the relays , it sits in the contacts closed (switch on) position, which bypasses the whole locomotive and connects the RCH jumpers at the two ends together (just like on each normal coach of the train).

Power is needed for the locomotive to respond to the carrier wave and become an active part of the driving system, but without that the loco falls back to being a very heavy coach. Clever design and obviously carefully thought through.
 
47286Dan

47286Dan

Established Member
Joined
27 Dec 2018
Messages
2,007
Saturday morning tours/movements

50050 LSLO KIRKCALDY 031Z251622 U CHESTER N
40013 LSLO CREWE HS 420Z251I22 F CHESTER N

57302 LSLO BEDFORD 621Z071522 U KINGSWEAR N
47593 LSLO BEDFORD 621Z071522 U KINGSWEAR N

Dan
 
Nym

Nym

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2 Mar 2007
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Somewhere, not in London
RichardAsh1981 said:
So the answer is yes, that is what "normally-closed" means here: if there is no power to the relays , it sits in the contacts closed (switch on) position, which bypasses the whole locomotive and connects the RCH jumpers at the two ends together (just like on each normal coach of the train).

Power is needed for the locomotive to respond to the carrier wave and become an active part of the driving system, but without that the loco falls back to being a very heavy coach. Clever design and obviously carefully thought through.
Click to expand...
This does of course all depend on the wiring being in the right place in the loco that it can work from either end or through the loco, not just the fundamentals of how it was designed in the first place.
 
Welshguy1048

Welshguy1048

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6 Apr 2023
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North Wales

Filmed at Prestatyn, North Wales

22/08/26 - Class 50 - 50050 (D400) "Fearless" T&T Class 40 - 40013 (D213) " Andania" Kirkcaldy to Llandudno - The Thistle & Dragon

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Filmed at Prestatyn, North Wales

22/08/26 - Class 40 - 40013 (D213) "Andania" T&T Class 50 - 50050 (D400) "Fearless"- Llandudno to Kirkcaldy - The Thistle & Dragon
 
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neil65

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Location
Huddersfield, Kirklees, United Kingdom
The Thistle & Dragon at Chester 22nd August 2026
D400 brought the tour down from Scotland & D213 Andania was attached at Chester to Llandudno
railway-photography.smugmug.com

Stalybridge, Crewe & Chester Saturday 22nd August 2026 - Railway-Photography

railway photographs from the last 100 years
railway-photography.smugmug.com railway-photography.smugmug.com
railway-photography.smugmug.com

Stalybridge, Crewe & Chester Saturday 22nd August 2026 - Railway-Photography

railway photographs from the last 100 years
railway-photography.smugmug.com railway-photography.smugmug.com
railway-photography.smugmug.com

Stalybridge, Crewe & Chester Saturday 22nd August 2026 - Railway-Photography

railway photographs from the last 100 years
railway-photography.smugmug.com railway-photography.smugmug.com
railway-photography.smugmug.com

Stalybridge, Crewe & Chester Saturday 22nd August 2026 - Railway-Photography

railway photographs from the last 100 years
railway-photography.smugmug.com railway-photography.smugmug.com
 
HertiageFan

HertiageFan

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30 Jul 2025
Messages
329
Location
Wakefield
Iskra said:
I also caught this tour amongst other yesterday at Chester, Rhyl and Wigan. D413 always looks stunning!

Click to expand...
Strangely the 40 hauled some of the trip solo, and the rake had no generator coach, how was the Central Door Locking powered? Thank you in advance for any information
 
Iskra

Iskra

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11 Jun 2014
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10,662
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West Riding
D6130 said:
Possibly from the carriage batteries....fed by the carriage dynamos?
Click to expand...
That would be my assumption too

HertiageFan said:
Strangely the 40 hauled some of the trip solo, and the rake had no generator coach, how was the Central Door Locking powered? Thank you in advance for any information
Click to expand...
Worth noting that it was a fairly light load by railtour standards
 
47286Dan

47286Dan

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Joined
27 Dec 2018
Messages
2,007
Wednesday morning tour

47593 LSLO CHESTRFLD 271Z321626 U CARDIFCEN N
57302 LSLO CHESTRFLD 271Z321626 U CREWE N
Coaches
3091, 3140, 1666, 3107, 3125, 3148, 3100, 80044, 3122, 3045, 17013

50050 replaces 57302 at Crewe

50050 LSLO CREWE HS 420Z321C26 F CREWE N

Dan
 
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