On Apr 10, 8:44*am, John B wrote:


if there are reasons 26 metre cars can't be used;



I would suggest there would be door access issues with stock longer
than 20 m.

On 20 m cars like 317/319/321 and 450/377/375 and 376 et al door
spacing is approx 1/3 and 2/3 car. A 26 m car would be more like 1/4
and 3/4 door spacing - which would lead to longer dwell times - any
more to place doors further towards the middle of a 26 m car would
have to larger a throwover at curved platforms - of which there are
too many stations to resolve.

If you take a look a 444s at Waterloo where the country end of a 10car
is on the curve its easy to see how much a 23 m car throws over. 444s
have end-ish doors so its no big deal - but imagine even 1/3 + 2/3
spacing on one of those cars leads to a big gap.

I'd have thought going the other way - to *shorter* but articlulated
cars might be better.

--
Nick