David Hansen wrote:
On Sun, 17 Jul 2005 20:03:53 +0100 someone who may be "RPM"
wrote this:-

Only the tripcock on the leading vehicle is "active" on a 165/168.

If two units are coupled together the tripcocks on the two cabs that
are coupled tend to trip but this does not prevent the train from
moving.

That probably/possibly involves the tripcock arms on the rear units
regularly striking a trackside trainstop arm at considerable speed,
once on each trip. This will be where the train enters the area
fitted with LT signalling. That can't be good for the life of the
arms and they are likely to break off at the point when they need to
work.

It would be better for the arms to be automatically moved out of the
way when coupled up.

Two points.
Firstly, LT trains work in the same way and I am not aware that they have
had problems.
Secondly, Once a tripcock is struck it remains in the up position until it
is reset when the unit is uncoupled so the rear unit tripcock will only be
hit once per period of time that the unit is coupled as the non leading
unit.


--
Cheers for now,

John from Harrow, Middx

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