Unfitted Freight Trains
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Unfitted Freight Trains
Unfitted Freight Trains can now be modelled in OpenRails. It is also possible to make a locomotive that has only a steam brake fitted and no train brakes.
A typical unfitted four wheeled wagon of 9 foot or 10 foot wheelbase might have a brakes entry something like this:
Comment ( ******************************* Brakes *******************************
Included in this section - Type, Force, Reservoir, Application, Release. etc
*********************************************************************** )
BrakeEquipmentType ( "Handbrake" )
BrakeSystemType ( "Manual_Braking" )
MaxHandBrakeForce ( 3.5kN )
ORTSBrakeShoeFriction ( 0 0.31 1 0.30 2 0.28 3 0.27 4 0.26 5 0.25 7 0.24 8 0.23 9 0.22 12 0.21 14 0.20 17 0.19 20 0.18 24 0.17 29 0.16 34 0.15 40 0.14 47 0.13 55 0.12 66 0.11 84 0.10 115 0.09 160 0.09 )
Comment ( * Cast Iron Brakeshoes * )
Wagons with a longer wheelbase often had a longer brake lever which would give a greater MaxHandBrakeForce.
At the moment the brake van or guards van also needs to be an unfitted one for this to work properly. The brakes section for an unfitted 20 ton guard's van should look something like this:
Comment ( ******************************* Brakes *******************************
Included in this section - Type, Force, Reservoir, Application, Release. etc
*********************************************************************** )
BrakeEquipmentType( "Manual_brake, Handbrake" )
BrakeSystemType ( "Manual_Braking" )
MaxReleaseRate ( 5 )
MaxApplicationRate ( 5 )
MaxBrakeForce ( 20kN )
MaxHandBrakeForce ( 20kN )
ORTSBrakeShoeFriction ( 0 0.31 1 0.30 2 0.28 3 0.27 4 0.26 5 0.25 7 0.24 8 0.23 9 0.22 12 0.21 14 0.20 17 0.19 20 0.18 24 0.17 29 0.16 34 0.15 40 0.14 47 0.13 55 0.12 66 0.11 84 0.10 115 0.09 160 0.09 )
Comment ( * Cast Iron Brakeshoes * )
The Manual Brake descripton allows the guards van brake to be applied using a keyboard short cut. In order to do this, you need to add to the EngineControllers section of your locomotive(s) the lines
Brake_Brakeman ( 0 1 0.2 0
NumNotches ( 1
Notch( 0 1 BrakemanBrakesControllerManualBrakingStart ) ) )
This can be added to any locomotive with either air or vacuum brakes or one with no train brakes at all.
When this is present in an eng file the Guard's hand brake can be applied using the SHIFT and [ keys and released using the SHIFT and ] keys.
To make a locomotive that has only steam brakes and no train braking system you will need to use a set up similar to the one described below.
In the wagon (top) section of the eng file:
Comment ( ******************************* Brakes *********************************************
Included in this section - Type, Force, Reservoir, Applicatiion, Release, etc
************************************************************************************ )
Comment ( *** No train brakes - loco brake is steam brake only *** )
BrakeEquipmentType( "Manual_brake" )
BrakeSystemType ( "Manual_Braking" )
MaxBrakeForce ( 54kN )
MaxReleaseRate ( 100psi/s )
MaxApplicationRate ( 10psi/s )
MaxHandbrakeForce ( 27kN )
ORTSBrakeShoeFriction ( 0 0.489 4 0.487 8 0.486 12 0.487 16 0.490 24 0.493 32 0.490 40 0.481 48 0.465 56 0.443 64 0.415 72 0.381 80 0.340 88 0.294 96 0.241 104 0.182 112 0.116 )
Comment ( * Friction estimate for wood brake shoes based on elm blocks on tramcars * )
In the Engine section of the eng file:
Comment ( *************************** Brake System *********************************************
Included in this section - Compressor, Reservoir, Application rates, etc
************************************************************************************** )
BrakesEngineBrakeType( "Steam_brake" )
And in the EngineControllers section of the eng file:
Brake_Engine ( 0 1 0.2 1
NumNotches ( 1
Notch( 0.0 1 EngineBrakesControllerContinuousServiceStart ) ) )
Brake_Brakeman ( 0 1 0.2 1
NumNotches ( 1
Notch( 0 1 BrakemanBrakesControllerManualBrakingStart ) ) )
Comment ( Brake_Train is not used in this configuration )
Steam leaks from the steam brake cylinder(s) can be modelled using SteamBrakeFX in the SteamSpecialEffects section.
Some examples and further information are available from the Coals to Newcastle website.
A typical unfitted four wheeled wagon of 9 foot or 10 foot wheelbase might have a brakes entry something like this:
Comment ( ******************************* Brakes *******************************
Included in this section - Type, Force, Reservoir, Application, Release. etc
*********************************************************************** )
BrakeEquipmentType ( "Handbrake" )
BrakeSystemType ( "Manual_Braking" )
MaxHandBrakeForce ( 3.5kN )
ORTSBrakeShoeFriction ( 0 0.31 1 0.30 2 0.28 3 0.27 4 0.26 5 0.25 7 0.24 8 0.23 9 0.22 12 0.21 14 0.20 17 0.19 20 0.18 24 0.17 29 0.16 34 0.15 40 0.14 47 0.13 55 0.12 66 0.11 84 0.10 115 0.09 160 0.09 )
Comment ( * Cast Iron Brakeshoes * )
Wagons with a longer wheelbase often had a longer brake lever which would give a greater MaxHandBrakeForce.
At the moment the brake van or guards van also needs to be an unfitted one for this to work properly. The brakes section for an unfitted 20 ton guard's van should look something like this:
Comment ( ******************************* Brakes *******************************
Included in this section - Type, Force, Reservoir, Application, Release. etc
*********************************************************************** )
BrakeEquipmentType( "Manual_brake, Handbrake" )
BrakeSystemType ( "Manual_Braking" )
MaxReleaseRate ( 5 )
MaxApplicationRate ( 5 )
MaxBrakeForce ( 20kN )
MaxHandBrakeForce ( 20kN )
ORTSBrakeShoeFriction ( 0 0.31 1 0.30 2 0.28 3 0.27 4 0.26 5 0.25 7 0.24 8 0.23 9 0.22 12 0.21 14 0.20 17 0.19 20 0.18 24 0.17 29 0.16 34 0.15 40 0.14 47 0.13 55 0.12 66 0.11 84 0.10 115 0.09 160 0.09 )
Comment ( * Cast Iron Brakeshoes * )
The Manual Brake descripton allows the guards van brake to be applied using a keyboard short cut. In order to do this, you need to add to the EngineControllers section of your locomotive(s) the lines
Brake_Brakeman ( 0 1 0.2 0
NumNotches ( 1
Notch( 0 1 BrakemanBrakesControllerManualBrakingStart ) ) )
This can be added to any locomotive with either air or vacuum brakes or one with no train brakes at all.
When this is present in an eng file the Guard's hand brake can be applied using the SHIFT and [ keys and released using the SHIFT and ] keys.
To make a locomotive that has only steam brakes and no train braking system you will need to use a set up similar to the one described below.
In the wagon (top) section of the eng file:
Comment ( ******************************* Brakes *********************************************
Included in this section - Type, Force, Reservoir, Applicatiion, Release, etc
************************************************************************************ )
Comment ( *** No train brakes - loco brake is steam brake only *** )
BrakeEquipmentType( "Manual_brake" )
BrakeSystemType ( "Manual_Braking" )
MaxBrakeForce ( 54kN )
MaxReleaseRate ( 100psi/s )
MaxApplicationRate ( 10psi/s )
MaxHandbrakeForce ( 27kN )
ORTSBrakeShoeFriction ( 0 0.489 4 0.487 8 0.486 12 0.487 16 0.490 24 0.493 32 0.490 40 0.481 48 0.465 56 0.443 64 0.415 72 0.381 80 0.340 88 0.294 96 0.241 104 0.182 112 0.116 )
Comment ( * Friction estimate for wood brake shoes based on elm blocks on tramcars * )
In the Engine section of the eng file:
Comment ( *************************** Brake System *********************************************
Included in this section - Compressor, Reservoir, Application rates, etc
************************************************************************************** )
BrakesEngineBrakeType( "Steam_brake" )
And in the EngineControllers section of the eng file:
Brake_Engine ( 0 1 0.2 1
NumNotches ( 1
Notch( 0.0 1 EngineBrakesControllerContinuousServiceStart ) ) )
Brake_Brakeman ( 0 1 0.2 1
NumNotches ( 1
Notch( 0 1 BrakemanBrakesControllerManualBrakingStart ) ) )
Comment ( Brake_Train is not used in this configuration )
Steam leaks from the steam brake cylinder(s) can be modelled using SteamBrakeFX in the SteamSpecialEffects section.
Some examples and further information are available from the Coals to Newcastle website.
darwins- Posts : 73
Join date : 2013-01-18
IsambardKingdomBrunel likes this post
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