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Author Topic: Qn.2 for Mark Hopwood: Decarbonising local railways  (Read 1375 times)
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« Reply #30 on: August 06, 2019, 03:03:16 pm »

Thank you Mark for providing that link. Much appreciated.
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« Reply #31 on: August 06, 2019, 04:58:38 pm »

The Severn Beach issues were also caused by crew, infrastructure and some other issues as well as fleet. Fundamentally the Turbo was the same train that had worked reliably in the Thames Valley.

The Class 230 has Ford Transit engines underneath that are failing in a terminal manner.

The scenarios are quite different.
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« Reply #32 on: August 06, 2019, 05:20:51 pm »

I think the point is lots of things may be possible but they havenít happened yet and I am not keen to have my services used as a testbed - that should be done when customers wonít be put at risk of service disruption.

Let's hope the 769s don't prove to have reliability and performance issues if and when they come out of their very prolonged testing period.

To view my GWML Electrification cab video 'before and after' video comparison, as well as other videos of the new layout at Reading and 'before and after' comparisons of the Cotswold Line Redoubling scheme, see:
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« Reply #33 on: August 06, 2019, 06:18:33 pm »

A battery powered train SHOULD be more reliable than a diesel powered one.
Batteries are inherently modular and means are readily available to automatically bypass a failed battery, allowing the train to proceed with almost unaltered performance.

Lithium iron phosphate batteries are the most likely technology, these are no longer new or exotic or untried technology, and are safer than lithium polymer batteries.

A 12 volt 100 AH lithium iron phosphate battery costs about £500 retail, less than half that much in bulk.
1,000 such batteries would cost in the region of £250,000 and would store over 1,000 Kwh of energy.
The total weight of these batteries is about 12 Kg each, or about 12 tons for 1,000 such.
That would power a 4 car train for a very considerable distance, silently and with zero pollution at the point of use.
Regenerative braking is easy with a battery train.
Charging could be fully automatic via a short length of conductor rail that for safety reasons is only rendered live when the train is over it.
Fast charging would be possible anywhere with an 11Kv mains supply available.
Slower charging anywhere with mains electricity.
Charging from existing OHLE is an alternative on routes that are partially electrified.

A proper intercity train has a minimum of 8 coaches, gangwayed throughout, with first at one end, and a full sized buffet car between first and standard.
It has space for cycles, surfboards,luggage etc.
A 5 car DMU is not a proper inter-city train. The 5+5 and 9 car DMUs are almost as bad.
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« Reply #34 on: August 06, 2019, 10:31:27 pm »

One of the things you become used to on this forum are the foibles of its members. It seems the class 230 is to Mark what the catering on IETs is to Broadgage!

However the continuing delays in the class 769 programme are of concern, as this must be messing up the cascade of units. It would be good to have some openness about the problems that clearly are being experienced. From what I have gleaned it appears that the OHL/diesel bi-modes have problems to be resolved. Have any "tri-mode" versions been completed and are any yet being tested?

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« Reply #35 on: August 13, 2019, 06:44:48 pm »

I donít feel obsessed about 230s. I just donít understand the enthusiasm to bring super-annuated LUL trains to GWR which would make performance more challenging but I accept the 769s have to show decent performance!
« Last Edit: August 16, 2019, 03:56:14 am by MarkHopwood » Logged
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« Reply #36 on: August 13, 2019, 06:55:39 pm »

I donít feel obsessed about 230s. I just donít understand the enthusiasm to bring super-animated LUL trains to GWR which would make performance more challenging but I accept the 769s have to show decent performance!

Given how long overdue the ones for TfW and Northern are, I think the first hurdle is that they show up at all.  Maybe you can beat the other two in getting yours in service first!  I see there have been some more failures of the 230 in the last few days, so whilst I was the one to suggest them, I do agree that the jury is still out on them, especially the diesel versions.
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