Open Rails Diesel Locomotive Standard Physics Parameters

Aim - this section describes the basic standard physics parameters required to correctly define a diesel locomotive in Open Rails Train Simulator. For advanced physics parameters see the Advanced Diesel Setting Parameters.

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Diesel Engine

Electric Motor

Diesel Exhaust Effects

Note: The default unit of measure (UoM) shown in the "Recommended Input Units" column is the UoM value that OR assumes if no UoM is included in the parameter statement.

ParameterENG or WAGDescriptionRecommended Input UnitsSuggested settingsNew or ExistingTypical Examples
General Information
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.ExistingORTSDriveWheelWeight ( 109.5t-uk )
Sanding ( x )ENGMaximum sped at which sand will be applied to the track.ValueAs per loco specs.ExistingSanding ( 25mph )
AntiSlip ( x )ENGIndicates whether antislip system is present.FactorAs per loco specs.
0 = no antislip, 1 = antislip
ExistingAntiSlip ( 0 )
ORTSWheelSlipCausesThrottleDown ( x )ENG / ORTSIndicates antislip system should automatically reduce the throttle setting to zero if wheel slip occurs.FactorAs per loco specs.
0 = no throttle down, 1 = throttledown
NewORTSWheelSlipCausesThrottleDown ( 1 )
Diesel Engine
MaxDieselLevel ( x )ENGThe maximum amount of diesel fuel the locomotive can carry.Volume - ft^3, in^3, m^3, l, g-uk, g-us, gal, gals
Default - l
As per loco specs.ExistingMaxDieselLevel( 1180g-uk )
MaxPower ( x )ENGThe maximum power output of the locomotive to the rail.Power - W, kW, HP
Default - W
As per loco specs.ExistingMaxPower ( 1295kW )
MaxForce ( x )ENGThe maximum force (tractive effort) that the locomotive can safely produce. Typically this is limited by the locomotive adhesion or motor overloads.Force - N, kN, lbf, lb
Default - N
As per loco specs.ExistingMaxForce ( 222.411kN )
MaxVelocity ( x )ENGThe maximum velocity of the locomotive. Typically limited by the mechanical design criteria of the locomotive.Speed - m/s, mph, kph, km/h, kmph, kmh
Default - m/s
As per loco specs.ExistingMaxVelocity ( 90mph )
MaxContinuousForce ( x )ENGThe maximum force the locomotive can continuously produce.Force - N, kN, lbf, lb
Default - N
As per loco specs.ExistingMaxContinuousForce ( 133.446kN )
MaxTemperature ( x )ENGThe maximum oil temperature that will be displayed.Temperature Difference - degC, degF
Default - degC
As per loco specs.ExistingMaxTemperature ( 120degF )
MaxOilPressure ( x )ENGThe maximum oil pressure. This occurs at maximum engine rpm.Pressure - psi, kPa, bar, inHg
Default - psi
As per loco specs.ExistingMaxOilPressure ( 90 )
DieselUsedPerHourAtMaxPower ( x )ENGThe amount of diesel used per hour when the locomotive is at maximum power.Volume - ft^3, in^3, m^3, l, g-uk, g-us, gal, gals
Default - l
As per loco specs.ExistingDieselUsedPerHourAtMaxPower ( 53.45g-uk )
DieselUsedPerHourAtIdle ( x )ENGThe amount of diesel used per hour when the locomotive is at idle.Volume - ft^3, in^3, m^3, l, g-uk, g-us, gal, gals
Default - l
As per loco specs.ExistingDieselUsedPerHourAtIdle ( 10g-uk )
DieselEngineIdleRPM ( x )ENGThe RPM at which the diesel engine idles.NoneAs per loco specs.ExistingDieselEngineIdleRPM( 450 )
DieselEngineMaxRPM ( x )ENGThe maximum RPM of the diesel engine.NoneAs per loco specs.ExistingDieselEngineMaxRPM( 850 )
DieselEngineMaxRPMChangeRate ( x )ENGThe maximum rate that the engine RPM can change in one second.NoneAs per loco specs.ExistingDieselEngineMaxRPMChangeRate( 40 )
Electric Motor
MaxCurrent ( x )ENGThe maximum current the locomotive can produce.Current - A, Amps
Default - A
As per loco specs.ExistingMaxCurrent ( 2600A )
Diesel Exhaust Effects
DieselSmokeEffectInitialMagnitude( x )ENGThe initial magnitude the smoke effect.NoneAs per loco specs.ExistingDieselSmokeEffectInitialMagnitude( 1.7 )
DieselSmokeEffectMaxMagnitude( x )ENGThe maximum magnitude the smoke effect will reach.NoneAs per loco specs.ExistingDieselSmokeEffectMaxMagnitude( 2.2 )
DieselSmokeEffectInitialSmokeRate( x )ENGThe initial rate at which smoke will be produced.NoneAs per loco specs.ExistingDieselSmokeEffectInitialSmokeRate( 0.2 )
DieselSmokeEffectMaxSmokeRate ( x )ENGThe maximum rate at which smoke will be produced.NoneAs per loco specs.ExistingDieselSmokeEffectMaxSmokeRate( 10 )