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Great Western Coffee Shop > Journey by Journey > Portsmouth to Cardiff > Theoretical Design For A New DMU For Portsmouth-Cardiff Services
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Author Topic: Theoretical Design For A New DMU For Portsmouth-Cardiff Services  (Read 28391 times)
devon_metro
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« Reply #30 on: May 30, 2008, 18:11:15 »
The government is silly. The fact that they have no money in the kitty and the fact that so much money is raked in through (rising!) fuel taxes sadly means the government (at present) is going to be reluctant to invest money is something that they don't get money is such massive amounts back.
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swlines
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« Reply #31 on: May 30, 2008, 18:17:22 »
Yeah, ^1.1bn~ from each new franchise is clearly far too little to give to the government!!  Shocked Roll Eyes
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dog box
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« Reply #32 on: June 02, 2008, 20:28:17 »
4 car turbostars will do
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John R
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« Reply #33 on: June 02, 2008, 22:49:57 »
I agree. Would be absolutely fine.
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Btline
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« Reply #34 on: June 03, 2008, 12:03:01 »
Quote from: John R on June 02, 2008, 22:49:57
I agree. Would be absolutely fine.

Yes, 4 cars would offset seat reductions.

You would want 172s.
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swlines
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« Reply #35 on: June 03, 2008, 12:11:55 »
I'd rather throw up at the opportunity of seeing 75mph Turbostars on the Cardiff Portsmouth route ... there is a high linespeed between Filton and Cardiff you know...
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Btline
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« Reply #36 on: June 03, 2008, 12:16:25 »
Quote from: swlines on June 03, 2008, 12:11:55
I'd rather throw up at the opportunity of seeing 75mph Turbostars on the Cardiff Portsmouth route ... there is a high linespeed between Filton and Cardiff you know...

172s are 100 mph.
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devon_metro
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« Reply #37 on: June 03, 2008, 12:21:41 »
Depending on how they are geared, the LO varients will be 75mph.
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swlines
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« Reply #38 on: June 03, 2008, 12:25:22 »
Quote from: Btline on June 03, 2008, 12:16:25
Quote from: swlines on June 03, 2008, 12:11:55
I'd rather throw up at the opportunity of seeing 75mph Turbostars on the Cardiff Portsmouth route ... there is a high linespeed between Filton and Cardiff you know...

172s are 100 mph.
172s will struggle to get to 100mph - they're designed to be highly geared to allow for high acceleration at the low end of the spectrum, optimum acceleration will probably be up to about 55mph... then a sloooooooooooooooooooooooooow increase to 100mph. I know where I'm coming from on this one so I wouldn't try argue it!

170s would be more suitable - shame the production line is currently full with 172s. Diesel 444 is still the best bet.
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devon_metro
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« Reply #39 on: June 03, 2008, 12:36:25 »
Turdostars don't even have corridor connections so get a no from me!

Diesel electrostars perhaps.
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Btline
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« Reply #40 on: June 03, 2008, 13:34:22 »
172 have better accererlation than 170s.

LM▸ (London Midland - recent franchise) 172s have corridor connexions (not the type in my avatar- that's a LO/Chiltern 75 mph version).

Perfect! Grin
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devon_metro
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« Reply #41 on: June 03, 2008, 16:48:42 »
Still rather a 444 diesel - no un-needed body tilt profile.
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Btline
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« Reply #42 on: June 03, 2008, 16:57:25 »
I think tilt profile is a requirement now (obviously not for SWT▸ (South West Trains) as you can't tilt with third rail).
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devon_metro
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« Reply #43 on: June 03, 2008, 16:58:51 »
Why is it required  Huh
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Btline
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« Reply #44 on: June 03, 2008, 17:01:21 »
I remember reading some stuff about clearance between tilting and non tilting stock to prevent scrapes.

Don't quote me on it by the way - it may not be true.....
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