Dinamica dei rotabili in OR, locomotive a vapore


Questa pagina √® ispirata da quelle assai più complete che si possono trovare su coalstonewcastle.com
È mia intenzione solo raccogliere e ordinare le numerosissime indicazioni che permettano di associare ai nostri rotabili una dinamica soddisfacente.
Queste pagine sono divise per tipo di rotabile e contengono le indicazioni per comporre correttamente il file dedicato alla dinamica sotto Open Rails.
parametri standard locomotive a vapore
test rotabili


Cosa fare per rendere compatibile una locomotiva a vapore per Open Rails


Nella tabella seguente ci sono i parametri e le relative indicazioni. Dopo la tabella un esempio di file .eng per locomotiva a vapore.

ParameterENG or WAGDescriptionRecommended Input UnitsSuggested settingsNew or ExistingTypical Examples
General Information
Type ( x )ENGDescribes the type of locomotiveTextSteam, Diesel, ElectricExistingType ( Steam )
ORTSSteamLocomotiveType ( x )ENGDescribes the type of steam locomotiveTextSimple, Compound, GearedNewORTSSteamLocomotiveType ( Simple )
WheelRadius ( x )ENGRadius of drive wheelsDistance - m, cm, mm, km, in, ft, in/2
Default - m
As per loco specsExistingWheelRadius ( 0.648m )
WheelRadius ( 36in )
NumWheels ( x )ENGNumber of wheel sets (ie axles).ValueAs per loco specs.ExistingNumWheels ( 4 )
ORTSDriveWheelWeight ( x )ENGTotal weight on the drive wheels of the locomotive.Mass - lbs, kg, t, t-uk, t-us
Default - kg
As per loco specs.NewORTSDriveWheelWeight ( 109.5t-uk )
Sanding ( x )ENGMaximum speed at which sand will be applied to the track.Speed - m/s, mph, kph, km/h, kmph, kmh
Default - m/s
As per loco specs.ExistingSanding ( 25mph )
IsTenderRequired ( x )ENGIndicates whether the locomotive is a tender or tank type of locomotiveTextAs per loco specs:
0 = no tender req'd
1 = tender req'd
ExistingIsTenderRequired ( 1 )
Boiler Parameters
ORTSSteamBoilerType ( x )ENGDescribes the type of boilerTextSaturated, SuperheatedNewORTSSteamBoilerType ( Saturated )
BoilerVolume ( x )ENGVolume of boilerVolumeDefaultFT3 - ft^3, in^3, m^3, l, g-uk, g-us
Default - ft^3
This parameter is not overly critical, and where an actual value is not available, use the appropriate calculator for your engine type.ExistingBoilerVolume ( 220.0ft^3 )
BoilerVolume ( 110.0m^3 )
ORTSEvaporationArea ( x )ENGBoiler evaporation areaAreaDefaultFT2 - ft^2, m^2
Default - ft^2
As per loco specs, or where unknown, use the appropriate calculator for your engine type.NewORTSEvaporationArea ( 2198.0ft^2 )
ORTSEvaporationArea ( 194.0m^2 )
MaxBoilerPressure ( x )ENGMax boiler working pressure (Gauge pressure)PressureDefaultPSI - psi, bar, kPa, inhg
Default - psi
As per loco specsExistingMaxBoilerPressure ( 200psi )
MaxBoilerPressure ( 200kPa )
ORTSSuperheatArea ( x )ENGSuperheating heating areaAreaDefaultFT2 - ft^2, m^2
Default - ft^2
As per loco specsNewORTSSuperheatArea ( 2198.0ft^2 )
ORTSSuperheatArea ( 194.0m^2 )
MaxSteamHeatingPressure ( x )ENGMax pressure in steam heating system for passenger carriages.PressureDefaultPSI - psi, bar, kPa, inhg
Default - psi
As per loco specs.
NB: Normally < 100psi.
NewMaxSteamHeatingPressure ( 80.0psi )
Locomotive Tender Info
MaxTenderWaterMass ( x )ENGWater in tenderMass - lbs, kg, t, t-uk, t-us
Default - kg
1 uk gal = 10lb
1 us gal = 8.34lb
As per loco specsExistingMaxTenderWaterMass ( 36500lb )
MaxTenderWaterMass ( 16000kg )
MaxTenderCoalMass ( x )ENGCoal in tenderMass - lbs, kg, t, t-uk, t-us
Default - kg
As per loco specsExistingMaxTenderCoalMass ( 13440lb )
MaxTenderCoalMass ( 6000kg )
Fire
ORTSGrateArea ( x )ENGLocomotive fire grate areaAreaDefaultFT2 - ft^2, m^2
Default - ft^2
As per loco specsNewORTSGrateArea ( 2198.0ft^2 )
ORTSGrateArea ( 194.0m^2 )
ORTSFuelCalorific ( x )ENGCalorific value of fuelEnergy Density - btu/lb, kj/kg, j/g
Default - kj/kg
Internet search - for coal use a default value of 13700 btu/lbNewORTSFuelCalorific ( 13700btu/lb )
ORTSFuelCalorific ( 33400kj/kg )
ORTSSteamFiremanMaxPossibleFiringRate( x )ENGMaximum fuel rate that fireman can shovel in an hourMass - lbs, kg, t, t-uk, t-us
Default - kg
Use following as defaults:
UK - 3000lb/h
US - 5000lb/h
Aus - 4200lb/h
New - alternate value to MSTSORTSSteamFiremanMaxPossibleFiringRate( 4200lb/h )
ORTSSteamFiremanMaxPossibleFiringRate( 2000kg/h )
SteamFiremanIsMechanicalStoker ( x )ENGIndicates that the locomotive has a mechanical stoker, and hence a large rate of coal feed.FactorAs per loco specs:
0 = no stoker
1 = stoker
ExistingSteamFiremanIsMechanicalStoker ( 1.0 )
Steam Cylinder
NumCylinders ( x )ENGNumber of steam cylindersFactorAs per loco specsExistingNumCylinders ( 2 )
CylinderStroke ( x )ENGLength of cylinder strokeDistance - m, cm, mm, km, in, ft, in/2
Default - m
As per loco specsExistingCylinderStroke ( 26in )
CylinderStroke ( 0.8m )
CylinderDiameter ( x )ENGDiameter of cylinderDistance - m, cm, mm, km, in, ft, in/2
Default - m
As per loco specsExistingCylinderDiameter ( 21in )
CylinderDiameter ( 0.6m )
LPNumCylinders ( x )ENGNumber of steam LP cylinders (Compound locomotive only)FactorAs per loco specsNewLPNumCylinders ( 2 )
LPCylinderStroke ( x )ENGLength of LP cylinder stroke (Compound locomotive only)Distance - m, cm, mm, km, in, ft, in/2
Default - m
As per loco specsNewLPCylinderStroke ( 26in )
LPCylinderStroke ( 0.8m )
LPCylinderDiameter ( x )ENGDiameter of LP cylinder (Compound locomotive only)Distance - m, cm, mm, km, in, ft, in/2
Default - m
As per loco specsNewLPCylinderDiameter ( 21in )
LPCylinderDiameter ( 0.6m )
Locomotive Gearing
ORTSSteamGearRatio ( a, b )ENGRatio of gearsValueAs per loco specsNewORTSSteamGearRatio ( 2.55, 0.0 )
ORTSSteamMaxGearPistonRate ( x )ENGMax speed of piston in ft/minValue onlyAs per loco specsNewORTSSteamMaxGearPistonRate ( 650 )
ORTSSteamGearType ( x )ENGIndicates whether the locomotive has fixed gearing or selectable gearingFixed, SelectAs per loco specsNewORTSSteamGearType ( Fixed )

Di seguito un esempio di file .eng per locomotiva a vapore. Il testo da inserire nel .eng è quello in nero, in azzurro i commenti da non inserire e in bianco o in verde i link
Nel file .eng i commenti possono essere inseriti come nell'esempio sotto scivendo: comment ( commento che voglio aggiungere ).
I parametri inseriti nell'esempio sotto sono il minimo per permettere una simulazione realistica della locomotiva sotto OR. Boun divertimento.

SIMISA@@@@@@@@@@JINX0D0t______

include ( ../FS_GR7316.eng) include l'eng da msts per tutti i parametri che non sono presenti in questo file (es. luci, punti fumo, ecc.)

Comment ( Renzo Grassi v. 1.0 2017 )

Wagon (

i valori sotto sono per le resistenze e si calcolano con il programma FCalc di Osakra.
ORTSDavis_A ( 6360.59 )
ORTSDavis_B ( 28.6932 )
ORTSDavis_C ( 5.7501 )

)

questa sezione riguarda la dinamica della locomotiva: potenza, velocità, consumi, ... devi conoscere le carrateristiche tecniche della locomotiva ovvero, volume della caldaia, superficie della griglia, superficie di riscaldamento, diametro e corsa dei cilindri, ... Sono tutti parametri da trovare sui libri oppure su questa pagina: Standard Steam Locomotive Specifications
Sono i parametri visti nella tabella sopra alla quale rimando.

Engine (
Comment ( *** General *** )
Type ( Steam )
ORTSSteamLocomotiveType ( Simple ) Comment (Used to define type of locomotive)
WheelRadius ( 1.015m )
NumWheels ( 6 )
ORTSDriveWheelWeight ( 51.3t )
Sanding ( 25mph )
IsTenderRequired ( 1 )

Comment ( *** Cylinders *** )
NumCylinders ( 4 )
CylinderStroke ( 68cm )
CylinderDiameter ( 45cm )

Comment ( *** Boiler *** )
ORTSSteamBoilerType ( Superheated ) Comment (Used to define type of locomotive)
BoilerVolume ( 8.3m^3 )
ORTSEvaporationArea ( 210m^2 )
MaxBoilerPressure ( 12bar )
ORTSSuperheatArea ( 67m^2 ) Comment (Not required for saturated locomotives)
MaxSteamHeatingPressure ( 100psi ) Comment (Not required for locomotives without steam heating installed)

Comment ( *** Fire *** )
ORTSFuelCalorific ( 13700btu/lb )
ORTSGrateArea ( 3.5m^2 )
SteamFiremanMaxPossibleFiringRate( 3000 )
ShovelCoalMass ( 14lb ) Comment (For manual fireman?? )

Comment ( *** Fuel *** )
MaxTenderCoalMass ( 6t )
MaxTenderWaterMass ( 22t )

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TORNA INDIETRO