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Stopping Distance and Braking Contact
SPIKE1320:
Hello,
Being new to Win-Digipet I'd like to understand how accurate the stopping distances are? Will every loco stop at exactly the same point, or is there some variance?
And is it essential for the "STOP" contact to be short in length and the "BRAKING" contact to be relatively long, or can they be any length?
Thanks,
IAN
michael1957:
Hello Ian,
you can adjust the stopping points in WDP up to 1 cm exactly. It is very important, however, that the locomotives are precisely measured and that the braking distances are adjusted as accurately and identically as possible (decoder settings and brake corrections). Having done this you will be able to determine the stopping points very precisely. The length of the contact path for braking and stopping depends on the scale of your system and the speeds you want to drive, especially before the braking points. If you reach the braking path with 160 km / h of course the braking distance will be longer than if you only get there with 80 km / h. For H0 I have installed brake contacts of about 50-60 cm, the stop contacts are as long as the longest locomotive of my system is (in my case about 35 cm). In H0e (here I drive my locos with a maximum of 50 km / h) the brake contacts are usually 26 cm and the stop contact is about 15 cm long.
Much success, beest regards and greetings from Austria! Michael
SPIKE1320:
Hello Michael,
Thanks very much! My system is HO.
I have measured them precisely. And I have all my loco's set to prototypical speeds using a Fleischmann speed wagon. There is a big difference from my slowest to my fastest eg: I have a class 81 with max speed of 45kmph and a class 103 with max speed of 200kmph.
If the braking distances should be similar, doesn't this present a problem. what is your suggestion in this case?
Thanks, I appreciate your time!
Regards from sunny Australia1
Ian
ebarra:
Hi Spike,
Just to add some,comments to Michael answers I would like to add.
I can hardly get 1 cm accuracy even with locks with esu decoders (which seems to be the more consistant)
Nevertheless, If stopping a train to a given position using ITDN is quite accurate ( but not with 1cm repeatability) once calibration and breaking of each loco is fine tuned, the stop distance using distance in profiles has no coherence at all with the distance requested while it should be as accurate than with the ITDN. It a shame as I really need those in shunting mode.
This remains unclear and I never got any reply on this.
If Michael can describe how he can get such accuracy on the stop position , I would love to learn how he manage to do it. I am working on this for at least two years on this topic.
Regards.
Eric
michael1957:
Hello,
I will try to explain and describe tomorrow evening if I can come back form my job at time. Have a nice evening! Regards, Michael
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