"Chippy" wrote in message
oups.com...
David 'Arsehole' Hansen wrote:

One way such systems can fail is if the arm breaks off. This risk is
controlled by not having arms generally not striking trainstops and
so not suffering the fatigue this involves. An arm at the front of
the train will only strike a trainstop on rare occasions.

The risk is so remote as to be of no concern. One of the benefits of
trip cocks is that they are a very simple system. Adding a system to
retract them would complicate the system, and probably increase the
chances of a wrong-side failure.

If there were any concern regarding this issue the simplest thing would
be to tell drivers to kick them out of the way during preparation.


I don't mean to be rude but that demonstrates a clear lack of understanding
and knowledge about the system!

Firstly the trip arm is not that accessible, secondly the force required
would result in some broken toes, thirdly given that large amount of
coupling and uncoupling Chiltern do often this would need to be done in
platforms at Marylebone and Aylesbury, and forthly the drivers would want a
£5k pay rise for doing it!

Andyh