(15-09-2010, 11:33 PM)merlin89 Wrote: thanks for that Peter but Im afraid Im not getting the timing for the warner for 113.
as I see it the O/L is 50 m minmum length therefore must be timed nearly to a stand and we use the berth track circuit length , the route box says Am occ for time . AL+AM= approx 300m
So to fit a MU at 100m and a loco at 200m would I be right in guessing AM = 100m so the time to stand would be 10s?
I agree that both AM and also that portion of AL alongside the platform are just over 100m long so that two multiple units or one loco hauled train can be platformed.
The ROL is short so the "practically at a stand" values as also applicable to PL release are appropriate. Therefore 10sec is correct.
Using my other rule of thumb to get a sense check using that figure, the release should occur at 50m from the signal. This would mean that the train wil have therefore been on AM for 10 sec and thus have travelled 50m in 10 sec, so 5 m/s which is approximately 10 mph. This averages the final approach speed so as we can be expecting the train still decelerating, it is clear that the instantaneous speed when the signal clears will be lower than that- it therefore is very close to being stopped.
PJW