Air Brakes - Additional Features
#1
Posted 10 July 2016 - 10:46 PM
The first one that will be added, will be to allow for air leakage from the train brake pipe, as very few trains operated with a perfectly sealed air brake system. Coupling hoses between cars were potential sources for leakage.
Most railway operating companies had standard tests to check the amount of leakage in the train brake pipe, and it appears that a leakage rate of approximately 5 psi/min was an acceptable amount.
The air leakage amount will be set by using the existing MSTS parameter - TrainPipeLeakRate.
Thus when the train brake pipe is connected to the main reservoir (eg, when the brake controller is in the LAP position), a constant air pressure will be maintained in the train pipe, despite the leaks from the train pipe. The main reservoir will decrease over time
However when the brake pipe is isolated from the reservoir (eg, when the brake controller is in the Running position), then air will slowly leak out of the train pipe (at the rate indicated in the ENG file), thus applying an increased BC pressure, and applying the brakes harder.
#2
Posted 10 July 2016 - 11:23 PM
#3
Posted 10 July 2016 - 11:31 PM
#4
Posted 10 July 2016 - 11:38 PM
#5
Posted 11 July 2016 - 02:45 AM
* Use the PASS setting if the 26L has a 3-position cut-out.
* Use the Regulator Valve if the globe valve knob is still in place.
Either way, I'm not sure MSTS or OR either, needs the complication of the above. The above was just a general FYI from one that has had to fight such brake valves for over a decade.
#6
Posted 12 July 2016 - 01:12 AM
I tend to purposely get leaks whether on rear or head end by making some cars bleed the air. But it sounds good to add a parameter instead of bleeding.
#7
Posted 12 July 2016 - 05:54 AM
#8
Posted 12 July 2016 - 10:20 AM
#9
Posted 12 July 2016 - 01:34 PM
ATW, on 12 July 2016 - 01:12 AM, said:
The existing MSTS parameter - TrainPipeLeakRate will be used. This parameter is in the ENG file, and it is expected that this value would be set at < 5psi/min.
copperpen, on 12 July 2016 - 10:20 AM, said:
Do you have any detailed information on how the ejector works? Is there a manual with specifications available?
Info like steam usage rates, vacuum creation rates, etc.
#10
Posted 13 July 2016 - 12:58 AM