"Charles Ellson" wrote in message
...
On Sun, 30 Jul 2006 07:40:29 +1000, "David Bennetts"
wrote:


Have you noticed that most narrow gauge rolling stock is narrow, whereas
DLR
is quite wide. If you have wide stock on narrow gauge tracks, there is a
potential problem with stability.

Like with 25NCs ?
It depends how low you go in terms of gauge and what you do with the
centre of gravity.
snip
--
Whilst those South African locos were a big beast compared with British
ones, compare their limited maximum speed on narrow gauge (60 miles per
hour) with speeds achieved by British express passenger locos on standard
gauge.

Sure the DLR could have been built at metre or 3 ft 6 in gauge, with its low
operating speeds, but what advantage would have been gained?

Regards

David Bennetts