29-09-2010, 01:11 PM
(29-09-2010, 10:38 AM)Zaphod Wrote: I don't think your direction of travel is the right way round. Wide-to-gauge trap points appear to branch out into a 'Y' shape in the direction of travel, presenting a gap for the train to fall into (at low speed). I assume the symbol seeks to replicate this arrangement to some extent, so that when viewed in the direction of travel it appears a bit like a 'Y', as the real version does.
That's my understanding anyway.
As an aside, I also assume that this type of trap point is capable of being run through (assuming appropriate point machine) so would have no trapping effect on 'wrong' direction trains. Can anyone confirm or deny this?
- ZB
I agree with you that it is the movement in the other direction to that shown by Alex which would be trapped.
Bear in mind that, like all trap points, there may be legitimate moves over them in the direction that they are designed to trap (eg at the end of a bi-directional loop) hence they will be worked as opposed to those which do not (at the "in" end of a unidirectional loop) which could therefore be trailable spring points.
A typical place where wide to gauge traps may be used is a spur siding in between two running lines. This would mean that there are legitimate moves both ways.