Comment 12 for bug 1141551

yes the brake reset command should be active also on moving trains at
least till this bug isn't solved

On Mon, May 19, 2014 at 1:44 AM, Carlo Santucci <email address hidden>wrote:

> First the easy topic: since release 2241 the unit of measure of pressure
> is determined by the one used within the .cvf file. There is also an option
> within the General ones to state the preferred unit of measure.
> Referring to braking problems maybe there is a bug, maybe there isn't. The
> problem is that many .eng files have non-coherent braking parameters. MSTS
> does not care for this, while OR uses such braking parameters in a more
> prototypical way. Therefore, if they are not coherent, problems can arise.
> To be more precise at least following rules must be followed in defining
> the braking parameters:
> 1) Obviously AirBrakesMainMaxAirPressure must be > than
> AirBrakesCompressorRestartPressure
> 2) AirBrakesCompressorRestartPressure must be > than
> TrainBrakesControllerMaxSystemPressure, else the controller pressure may
> drop below the MaxSystemPressure (due to braking) and stay there even by
> releasing brake, because the compressor does not restart
> 3) AirBrakesMainResVolume must have a sufficient value so as to recharge
> also a long train
> 4) TrainBrakesControllerMaxApplicationRate and
> TrainBrakesControllerMaxReleaseRate must have a value high enough to not
> slow too much discharging and recharging the brakes along the train
> 5) Within the Options of the Open Rails menu the recharge rate must be set
> to a convenient value.
> Probably there are other conditions to be checked
>
> This is a possible set of values:
> AirBrakesMainMaxAirPressure( 145 )
> AirBrakesMainResVolume( 40 )
> AirBrakesCompressorRestartPressure( 115 )
> TrainBrakesControllerMaxSystemPressure( 75 )
> TrainBrakesControllerMaxApplicationRate( 10 )
> TrainBrakesControllerMaxReleaseRate( 10 )
>
> EmergencyBrakeResMaxPressure may be set to 75, while
> BrakeCylinderPressureForMaxBrakeBrakeForce may be set to 55
>
> A possible value for the recharge rate within the Open Rails menu
> is 63.
>
> Referring to the Acela case I don't know what to say because it has a dual
> pipe system.
>
> However I have a change proposal for Chris that will make many OR users
> hail it: the brake reset command (that isn't prototypical, but saves
> many stuck cases) should be active also on moving trains. That would not
> make it less prototypical, but on the contrary would avoid the non-
> prototypical train stops necessary now to reset the brakes because the
> loco parameters are only MSTS compatible and not OR compatible.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1141551
>
> Title:
> Train brakes won't release fully
>
> Status in Open Rails Tracker:
> Triaged
>
> Bug description:
> Route = Various
> Locomotives & Consists = Various.
> Example presented = E-7 "Little Joe" on RMD_East route (Lukas Lusser).
> Version OR = X1455
>
> I am providing a .PNG screen-shot of the anomaly, but in essence what
> happens is that the train brakes do not fully release irrespective of how
> many times the ; Key is pressed.
> This is not a regular, consistent anomaly; sometimes it happens and
> sometimes it doesn't, which made me wonder if it was an actual realistic
> effect that you have introduced.
>
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