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31
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All across the Great Western territory / The Wider Picture - related rail and other transport issues / Re: Unpaid work for Network Rail track thief
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on: July 17, 2010, 21:58:46
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Unlucky for getting caught. Seems that while it was technically wrong, he wasnt really doing anyone any harm.
At least he didnt steal rail currently in use or signalling/power supply cable live with 600V, unlike the scum that are pillaging the network seemly unaccosted.
Why did they even stop him he was in a NR» lorry in NR uniform? Why is a NR employee going to be stealing lead from roofs??
Instead of going for the easy targets, why dont they go for the pikeys in the stolen, usuall un-taxed/un-MOTd vehicles, wearing plain HVVS usually of the wrong colour that are are costing the network millions in lost time and repair costs every month.
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32
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Journey by Journey / London to the West / Re: HST hits tree at Lavington today - 10 July 2010
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on: July 17, 2010, 12:50:29
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Inergen is a fire supressent as already stated. It is an inert gas that replaces the oxygen in the engine room and thus acts to starve the fire. It is potentially harmful to human, but only from perlonged exposure.
It replaced the previous fire system fitted to the power cars when built called 'Halon', and this workled by releasing a gas onto the fire, which via a chemcial reaction, removed the oxygen from the air and whilst it was a highly effective system, it was leathal and was also damging to the Ozone.
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33
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Journey by Journey / London to the West / Re: HST hits tree at Lavington today - 10 July 2010
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on: July 16, 2010, 19:03:57
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. I cannot think of an occasion why a driver would want to do so in all honesty. It wouldnt increase the brake effort so it is to all intents and purposes a somewhat pointless thing to do, particularly if you have been briefed that by doing so you could disable the WSP system on the train.
Panic!? And, to enable the Inergen Fire bottles to discharge, as instructed on the label next to the Fire Override Plunger on the cab desk! |
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34
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Journey by Journey / London to the West / Re: HST hits tree at Lavington today - 10 July 2010
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on: July 16, 2010, 17:53:28
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Sorry you're right,
I know. Wonderful....so vein......! Really, without causing any undue panic, it is abit an oversight really, as the old fail-safe system has been replaced with one which is obviously less so. So should power to train wire 12 be lost for any reason (i.e. dislodged or disconnected 36-way, CCB trip either end, Master Switch to OFF either by error or unsolicited) you potentially massively extend the braking distance of the train. Scenario 1 - You are running along and the train hits some bulky debris on the line, this knocks out the 36-way jumper and the driver applies the anchors. The debris was dropped by a train ahead of you which also stopped quickly because of a sudden fault. Your train is now in an uncontrolled slide heading towards the back of the stationary train. Scenario 2 - You are driving along at high speed and you suddenly see the line ahead is blocked; you hit the EMG plunger, Put the MC to OFF, anything that might help in the panic and then take cover. Train Wire 12 is now de-energised, you hit the obstruction at 110 in an uncontrolled slide rather than 75 with all the WSPs behind you doing their job. Scenario 3 - You suffer an onboard fire whilst on the move. For the Fire Supression system in a powercar to function, the MC has to be in the OFF position. Granted, the Inergen will not discharge until the set speed falls below 6mph, but upon hearing the firebells, the Driver may instinctivley operate the EMG plunger and shut the desk down. Weeeeeeeeeeeee off we go into a slide.... Just a little bit of a design flaw!!! |
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35
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Journey by Journey / London to the West / Re: HST hits tree at Lavington today - 10 July 2010
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on: July 16, 2010, 11:02:27
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Quoting a knowledgeable source: "The CCB tripped on the leading power car so all the WSPs turned off"
XThis situation is not possible, as each vehicle has an individual WSP system and whilst on 'other' forums, it has been claimed that the CCB tripped in the leading power car which (as has already been commented upon) is not surprising considering that the desk has been destroyed inevitably causing electrical shorts, this would have only disabled the WSP system in the leading powercar, not throughout the train. The flats (Burns is probably a more appropriate word) were caused by...how can i put it...a slight operational error when the set was being rescued, but considering the unusual circumstances and the pressure to recover the stricken set, it is understandable. Very wrong on both counts. 1. The Westinghouse WSP racks need to see a feed on train wire 12 from the leading power car, granted the old WSP units were a self contained item, but not now. If you stand next to the trailer cars when the desk is opened you can hear the blow down valves operating as the unit runs through its self test. No train wire 12 and they turn off. Huge chunk of tree trashing the desk caused CCB to trip, hence no TW12. Simples. 2. The flats occurred due to the above happening. Nice try, but no prize. At least you got the circuit breaker initials right. Sorry you're right, i forgot that they are all Westinghouse fitted now. The flat cause was what ive been told from some high-up people at my place who should be pretty informed, but perhaps not. |
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36
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Journey by Journey / London to the West / Re: HST hits tree at Lavington today - 10 July 2010
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on: July 14, 2010, 23:04:03
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BTW▸ , sorry for double post, for the benefit of the 'norms' here who like their acronyms to be explained, CCB = Control Circuit Breaker, which is part of the large bank of breakers fitted to the Electrical Control Cubicle inside a power car.
As the name suggests, the CCB protects the 110V supply to the various control systems within the powercar, such as the WSP system, Control Modules & Control circuits.
For future reference, excuse any typos this is all from memory!!
CCB - Control Circuit Breaker
CMCB - Compressor Circuit Breaker
FCB - Fire system Circuit Breaker
BMCB1 - Blower Motor Circuit Breaker (For #1 & #2 Traction Motors)
BMCB2 - Blower Motor Circuit Breaker (For #3 & #4 Tracion Motors)
FPCB - Fuel Pump Circuit Breaker
LCB1 - Lighting Circuit Breaker (1)
LCB2 - Lighting Circuit Breaker (2)
EFCB - Extractor Fan Circuit Breaker
BCB - Battery Charger Circuit Breaker
BCCB - Brake Control Circuit Breaker
PACB - Public Address Circuit Breaker
HCB1 - Heating Circuit Breaker (1)
HCB2 - Heating Circuit Breaker (2)
TPWSCB - Train Protection & Warning System Circuit Breaker
TSCB - Train Supply Circuit Breaker
PHCB - Pre-Heater Circuit Breaker (Replaced the NRNCB - National Radio Circuit Braker)
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37
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Journey by Journey / London to the West / Re: HST hits tree at Lavington today - 10 July 2010
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on: July 14, 2010, 22:48:19
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Quoting a knowledgeable source: "The CCB tripped on the leading power car so all the WSPs turned off"
XThis situation is not possible, as each vehicle has an individual WSP system and whilst on 'other' forums, it has been claimed that the CCB tripped in the leading power car which (as has already been commented upon) is not surprising considering that the desk has been destroyed inevitably causing electrical shorts, this would have only disabled the WSP system in the leading powercar, not throughout the train. The flats (Burns is probably a more appropriate word) were caused by...how can i put it...a slight operational error when the set was being rescued, but considering the unusual circumstances and the pressure to recover the stricken set, it is understandable. |
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All across the Great Western territory / The Wider Picture - related rail and other transport issues / Re: Class 172 on test
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on: March 20, 2010, 10:16:02
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Think it's probably to help the maintenance staff, since the exhaust will presumably be rather more easily accessible than in other trains.
As a maintenance staff member myself(!), to be honest from the looks of it, the exhaust will be more of a hinderance than a help. Exhaust systems barely need to be touched in comparison to the components requiring regular maintenance/inspection that the exhaust pipe shown covers. It was probably a last minute thought/edition to the design, as often occurs, and i should imagine that it will not only pose a major burn risk to a staff, but also be more velnerable to impact damge etc than other DMU▸ vehciles where it is safely routed underneath. |
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All across the Great Western territory / Across the West / Re: How NOT to run a railway......
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on: January 26, 2010, 23:08:45
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I'm with Chris B and the other Nay voters on this one, train is not scheduled to stop, Network Rail have not given permission for the stop to uplift or set down passengers and FGW▸ would strictly speaking not be insured for passengers joining or alighting at that station.
Now imagine driver opens doors, passenger slips and falls down the gap, who do you recon FGW will pin the blame on? The driver would probably be out the door and the next week commuters would moan that their train has been cancelled due to a lack of traincrew.
Even worse, a passenger tries to board after the driver has shut the doors and taken power and the passenger falls down the gap, with do despatch equipment to look at the driver would have no way of knowing.
The rule book is quite clear when it says:
If you are working a passenger or empty coaching stock train with
power-operated doors which is stopped at a platform it is not
booked to stop at, you must not release the doors.
Spot on. Right way, Wrong way, Railway!  |
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All across the Great Western territory / Across the West / Re: First Class food
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on: January 22, 2010, 23:45:21
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I did try the Breakfast platter a couple of days ago. It did come in a cardboard box which I didn't mind but the plastic cutlery was a bit flimsy. The quality of the food was excellent, Sausage, fried egg, 2 rasher of bacon, tomato, tosat and mushrooms, all hot and fresh.
My only gripe is the one you are expecting...price...^7.95.
If you got a cup of tea or coffee in there as well it would be well worth it, but as an extra, that makes it nearly a tenner....
Thats the problem - in FC‡ you stil pay 7.95 but you get it on a plate with metal cutlery Yes, but the extra price of your ticket soon makes up for that!!!!!! |
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