Atomic Systems

I'm trying to simulate wagons that have bad brakes and are prone to sliping or wheel locking if harsh braking but so far have had no joy, I've experimented with the Adhesion and MaxBrake Force settings but each time the braking is exactly the same, I even set the MaxBrake Force to 0 and the train still braked the same!

Any advice and also which is the most realistic Adhesion setting for wheelslip?

Any help appreciated!

GM228

Hi
To simulate bad brakes try mixing the systems.
ie
have a loco with 'single_air_pipe' but some of the stock as 'twin_air_pipe'.
If you brake gently you'll not notice...but if you hit them a bit hard...they'll take some getting off....and will drag.
As to wheel-slip adjust the number of wheels in the eng section ( second time its mentioned in an eng file,after the lights, first time is for friction) but don't go above 4.5
Cheers
Jon

"Any advice and also which is the most realistic Adhesion setting for wheelslip?"

Most early diesel electric locomotives before computer controls, had about 25% adhesion on clean dry well maintained rail. Early wheelslip control such as EMD Dash 2 electronics, might get this up to 26.5-27%. Inorder for the sim to get this right, you have to write the adhesion line a little different than you might expect. The reason, is the way sanding adhesion is handled.
Adheasion ( 0.26 0.50 2.0 0 ) in conjunction with a second NumWheels of 4 will get everything right for these early diesels, but be sure to completely remove the antislip line often found just below the friction lines. This results in a slipping adhesion of 13%, a clean dry rail adhesion of 25%, and a sanding quartz/iron adhesion consistent with that friction coefficient.
Bob Boudoin

Thanks for the info Bob.. very useful as always..
I know steam is different but have you any kind of adhesion values that could apply to a small /medium and large engine...
as in a branch line -4-4-0/2-6-0... a mixed traffic loco 2-6-2/4-6-0 and express/goods loco 4-6-2/2-8-0.
I appreciate that there are big variations but I'm just looking for some base values that 'make sense' in each group and can be tailored as and when needed after.
Any input gratefully welcome.

Please check this active thread, hopefully it should eventually get the correct value by calculation for any steam loco.

http://forums.uktrainsim.com/viewtopic.php?t=62800

Ian