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[email protected] · April 3rd 17, 07:41 AM posted to uk.transport.london

In article , () wrote:

On 02.04.17 18:06, Basil Jet wrote:
On 2017\04\02 17:16, Jarle Hammen Knudsen wrote:

Two mates commented, on different occations, that the GOBLIN train
felt different than others they had been on. I have investigated and
172 has different bogies than other Turbostars and mechanical
transmission rather than hydraulic - gear changes can be distinctly
heard as the trains accelerate and decelerate (Wikipedia). One mate
said it felt like a bus.

I wonder why they built them like that?

Speaking of peculiar, London has four places where trains switch between
overhead and third rail, namely Acton Central, Mitre Bridge, Drayton
Park and Farringdon/City Thameslink. I have no idea how common
pan-up-pan-down in service is globally. The 313 trains at Drayton Park
very noticeably go though a "turn-it-off-and-turn-it-back-on-again"
moment.

It also happens at City Thameslink northbound on 377s. I would not
call it "turn-it-off-and-turn-it-back-on-again," so much as changing
modes. It's actually not that easy to turn a train on or off.

But is it simpler than for the 319s? Their technology is closer to that of
the 313s than the 377s.

--
Colin Rosenstiel