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If they are indeed keeping them in service to dec 2023 heavy maintenance will now be required. This has been postponed due to the run down of the class.
We don’t know the actual power consumption of the mk5s. On the class 68 once ets is activated a faster idle is required to supply the necessary ets voltage. Same as other ets diesels.
I doubt very much mk5 day Coach aux loads are much different to any other comparable vehicle with a max of...
This was proposed on voyagers but it changed the braking feel sufficiently that drivers would not accept dynamic brake isolation especially on a temporary geographical basis. Permanent isolation increases maintenance costs significantly.
Anglia not the only ones having to delay introduction of FLirts.
https://www.railjournal.com/fleet/goahead-forced-to-borrow-trains-for-stuttgart-regional-services/
The 201 head end power is ac 3 phase 415 v like hst but unlike hst is locked to 50 hz with an aux gen directly connected to engine. So idle speed is very high and corresponds to full engine rated speed. Traction is controlled by a separate alternator rectifier to control speed.
Uk eth practice...
It’s probably due to the ungrounded plastic earth pin on most phone chargers. Most but not all laptops use a grounded charger with a real earth pin so might not be affected. The earth pin on most trais is connected to the train bodyshell and rcd is used on live and neutral pins. The ungrounded...
The only option is using a few spare mk IV’s perhaps on the core route as crowd busters with suitable traction sourced. There is also a lot of staff training to consider with different stock and geographic area could be limited to minimise this.
They would indeed perform similarly for GNWR if the non tilt max speed is still 110 mph for the proposed Blackpool services. It will be down to lease costs and availability.
It’s never going to be cost effective to graft a cab onto a MK4 seated coach or add seats to a dvt and meet today’s safety standards. I’m sure such a mod would end up costing more than asking CAF to build some additional dtf’s .im sure the dvts will run largely unchanged.
CL345 and CL710 have two speed traction motor blowers so they can be very quiet when under low load. I believe that 720 has the same arrangement but it might have gone into high speed mode due to repeated full power moves on Derby TT. SWR and WMT aventras have moved to self ventilated traction...
Only locos with ar multiple working jumpers and eth. Also cab controls on dtf are based on 68. So reality is that only 68 and 88 or new 93 are fully compatible. 67 might also be ok.
Locos also need mods for tcms system e.g asdo and destination indicators. Etc
Another option for "Modern Diesel trains stopgap" could be spare MK4 sets released from ECML through wired with AR jumpers and class 67's "power cars" maintained at Toton at each end. No DVT required as "power car" at each end. Meets PRM requirements and 125 mph capability and used as a stopgap...