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Class 769 Flex trains

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Hartill

Posts: 45
Class 769 Flex trains - Posted: April 11, 2018 - 8:16 PM Quote and reply
The 319 conversions to BI modes should be doing test runs on the GCR soon.

At a recent presentation it was said the bench mark for these sets will be to match 150's uphill and current simulations show they can keep time on the services that are being proposed. In the diesel mode the trains will still have a 100mph top speed so while the power may not be there they will be able to use gravity and also the 75mph cut off on the 15X sets will not apply so they can keep going to a natural balancing speed.

The two diesel alternator sets are on rafts and will add about 7t to the driving cars. For major faults or extensive maintainance the raft can be dropped from the trains and a replacement one put in. The diesel power pack and control was described as tricking the unit into thinking its on the 3rd rail. The sets can also be 750v enabled. There may well be more customers that Northern and Arriva Wales

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Sean Emmett

Posts: 152
Re: Class 769 Flex trains - Posted: April 12, 2018 - 12:03 AM Quote and reply
Hartill said:
The 319 conversions to BI modes should be doing test runs on the GCR soon.

There may well be more customers that Northern and Arriva Wales


Rail Forums and WNXX suggesting that GWR are interested in 769s for Reading - Gatwicks and diagrams that some of the 387s can't cover as 12 of them will be replacing 332s on HEX, which will go to replace xxx somewhere else or be scrapped.

So that 750V DC capability may be needed after all...





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g

Posts: 1
Re: Class 769 Flex trains - Posted: April 23, 2018 - 12:40 PM Quote and reply
Sean Emmett said:
[]So that 750V DC capability may be needed after all...

Seems that way. These could turn out to be an excellent solution for North Downs, given the large chunks which have third rail (and indeed Oxford and Cotswold line, possibly, for any remaining turbo / non-IET diagrams!). Will be really interesting to see how they perform. 100mph with decent-ish performance under the wires on the main line makes them more than adequate turbo replacements there too, potentially, while fleets get juggled around (I have no idea whether that's actually planned )!

Interesting that comparisons are made with Sprinters, wonder how they'll fare on the non-electrified bits of the NDL compared to the newer Turbos they'll be replacing.

Tri-mode, eh?

Fond memories of heading down to Brighton a couple of decades ago can soon be relived, and 31^H^H769s will once more be seen at Gatwick! >.<

https://www.globalrailnews.com/2018/04/20/gwr-plans-rollout-of-tri-mode-trains/

Bill Gallafent.
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