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Class 442s - Now at the end of the road and to be withdrawn permanently
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SWRtrain_fan
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See post #3580 for some pictures. I did ask SWR when they expect all 18 442s to enter service, unfortunately the expected date is December 2020, so still quite a while away
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See post #3580 for some pictures. I did ask SWR when they expect all 18 442s to enter service, unfortunately the expected date is December 2020, so still quite a while away
That would imply 1/month from now, which would appear to be rather slow unless that includes retractioning.
RichSwitch
Member
What is the latest on the retractioning? All seems quiet on that front. I’m guessing that they won’t introduce all nine 10 car sets before that happens. Logic would seem to dictate that some are retractioned before introduction to enable the remainder to be done. Having said that logic would have dictated to do the retractioning and then the refurbishment; not the other way around.
Two more questions:
1. How long is it expected that the retractioning of each unit will take?
2. Which is more expensive: the retractioning or the refurbishment?
Two more questions:
1. How long is it expected that the retractioning of each unit will take?
2. Which is more expensive: the retractioning or the refurbishment?
The original retractioning scope didn't include auxiliary supplies (a big issues as regards EMC and other issues with 442s) so retractioning has to await the delivery of static converters which was estimated for this summer. Full 442 use was also mentioned to require power supply upgrades.
Hence all 18 in use from Dec2020 sounds sensible.
swt_passenger
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1. Don’t know, but a few weeks if the 455s are anything to go by.
2. Retractioning is by far the majority of the cost. The figures for the Desiros and 442s have come up earlier, having now searched I think the 442 total work came in at around £500k per vehicle, that’s many times the average cost of the Desiros, at around £70k per vehicle. Even if a 442 carriage refurb came in much higher, say towards £100k, that would mean the traction package costing about £2M per train, and it’s all under one coach.
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molecrochip
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Is it "undergoing", or as I suspect, is it "on hold, awaiting parts"?
Don Steedy
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Undergoing. First unit expected to be outshopped next month
spark001uk
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I assume the daily pair aren't running during the strike? I don't see any 9B in the schedules.
SWRtrain_fan
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This isn't a big problem, but why do the SWR 442s not have the new Aircharge tables like the refurbished SWR Desiros?
lsdghasu
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Possibly the 442 is unable to power the Aircharge due to it being an older train. So they only installed plug sockets. (I may be wrong)
theironroad
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I'm pretty sure this is the reason, with a plug there is the option to charge a laptop and a plug is more versatile. To provide plugs in the whole train wouldn't be feasible as there isn't the power available , so standard is limited to usb which is still fine for most people who just want to charge their phone....
spark001uk
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Technically it doesn't really make much difference, whether an internal power supply unit drops the train supply to 5v for a USB port, or it drops down to 240v into a mains socket, then down to 5v when you plug your device's mains charger in. The current drawn from the train supply will be about the same.
Of course going with USB only, means that you're not going to be able to plug a laptop in to charge, or any other charger which has a hard wired cable for that matter.
The third rail supply goes through a dc-ac converter, then drops down to 240v, then right down again to the very low voltage that device chargers produce, so the current drawn per socket from the train supply would be in the milliamps, so not much at all really.
Of course going with USB only, means that you're not going to be able to plug a laptop in to charge, or any other charger which has a hard wired cable for that matter.
The third rail supply goes through a dc-ac converter, then drops down to 240v, then right down again to the very low voltage that device chargers produce, so the current drawn per socket from the train supply would be in the milliamps, so not much at all really.
Don Steedy
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The aircharge tables are being fitted to first class soon
Monty
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Basically the reason the old tables are currently still on the unit in use is that the proposed table failed its crash worthiness test and they have had to go back and alter the design.
Bletchleyite
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And with phone batteries improving a bit now, and battery packs being ubiquitous, laptops are probably the main use case.
spark001uk
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Also a lot of newer smartphones etc have evolving USB charging systems, such as qualcomm quick charge for example, which uses higher voltages to charge the device quicker.
Ok the device should still fall back and charge off a standard USB, which in most trains I've tried only gives out 0.5 to 1 amp, but it'll take forever to accomplish a decent charge.
Ok the device should still fall back and charge off a standard USB, which in most trains I've tried only gives out 0.5 to 1 amp, but it'll take forever to accomplish a decent charge.
randompixel
Member
If they had installed USB-C you might be able to charge a laptop over it instead of a 3-pin plug. Seems to be the way things are heading.
Don Steedy
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2403/2408 running today on the usual services
Classic - thought it might be. Seems that SWR are trying to blame anything else except the 442s for disruption!
It’s just a bad coincidence. If a 444 had received disco signals then no one would bat an eyelid
HamworthyGoods
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Why is it the 442s in your mind that have caused the disruption not the signal that reverted to red in front of the driver?
swt_passenger
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I think you might have misread TEW’s post. He wrote “unlikely”, therefore suggesting the 442 was not the reason...
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