Add steam booster pressure cab control

Author: peternewell

Source/Orts.Formats.Msts/CabViewFile.cs

@@ -133,6 +133,7 @@ public enum CABViewControlTypes
         STEAM_BOOSTER_AIR,
         STEAM_BOOSTER_IDLE,
         STEAM_BOOSTER_LATCH,
+        STEAM_BOOSTER_PRESSURE,
         WATER_INJECTOR1,
         WATER_INJECTOR2,
         SMALL_EJECTOR,

Source/Orts.Simulation/Simulation/RollingStocks/MSTSSteamLocomotive.cs

@@ -134,6 +134,7 @@ public class MSTSSteamLocomotive : MSTSLocomotive
         public bool SteamBoosterIdleMode = false;
         public bool BoosterGearsEngaged = false;
         public bool SteamBoosterLatchedLocked = false;
+        public float SteamBoosterPressurePSI;
         float BoosterGearEngageTimeS;
         float BoosterIdleHeatingTimerS;
         float BoosterIdleHeatingTimePeriodS = 120; // This is the time period that the Booster needs to be idled to heat it up
@@ -143,6 +144,8 @@ public class MSTSSteamLocomotive : MSTSLocomotive
         public float HuDBoosterSteamConsumptionLbpS;
         public float BoosterSteamConsumptionLbpS;
         float BoosterIdleChokeSizeIn;
+        float BoosterPressureFactor = 0;
+        float BoosterMaxIdleChokeSizeIn = 0.625f;
 
         /// <summary>
         /// Grate limit of locomotive exceedeed?
@@ -1317,22 +1320,27 @@ public override void Initialize()
             if (MaxBoilerPressurePSI > 300)
             {
                 BoosterIdleChokeSizeIn = 0.375f;
+                BoosterPressureFactor = BoosterIdleChokeSizeIn / BoosterMaxIdleChokeSizeIn;
             }
             else if (MaxBoilerPressurePSI > 275 && MaxBoilerPressurePSI <= 300)
             {
                 BoosterIdleChokeSizeIn = 0.4375f;
+                BoosterPressureFactor = BoosterIdleChokeSizeIn / BoosterMaxIdleChokeSizeIn;
             }
             else if (MaxBoilerPressurePSI > 250 && MaxBoilerPressurePSI <= 275)
             {
                 BoosterIdleChokeSizeIn = 0.5f;
+                BoosterPressureFactor = BoosterIdleChokeSizeIn / BoosterMaxIdleChokeSizeIn;
             }
             else if (MaxBoilerPressurePSI > 200 && MaxBoilerPressurePSI <= 250)
             {
                 BoosterIdleChokeSizeIn = 0.5625f;
+                BoosterPressureFactor = BoosterIdleChokeSizeIn / BoosterMaxIdleChokeSizeIn;
             }
             else
             {
                 BoosterIdleChokeSizeIn = 0.625f;
+                BoosterPressureFactor = BoosterIdleChokeSizeIn / BoosterMaxIdleChokeSizeIn;
             }
 
             // Set crank angle between different sides of the locomotive
@@ -2343,15 +2351,16 @@ public override void Update(float elapsedClockSeconds)
                     {
                         // In Idle mode steam consumption will be calculated by steam through an orifice.
                         // Steam Flow (lb/hr) = 24.24 x Press(BoilerPressure + Atmosphere(psi)) x ChokeDia^2 (in) - this needs to be multiplied by Num Cyls
-                        var BoosterPressurePSI = BoilerPressurePSI + OneAtmospherePSI;
-                        SteamEngines[i].CylinderSteamUsageLBpS = pS.FrompH(SteamEngines[i].NumberCylinders * (24.24f * (BoosterPressurePSI) * BoosterIdleChokeSizeIn * BoosterIdleChokeSizeIn));
+                        SteamBoosterPressurePSI = (BoilerPressurePSI + OneAtmospherePSI) * BoosterPressureFactor;
+                        SteamEngines[i].CylinderSteamUsageLBpS = pS.FrompH(SteamEngines[i].NumberCylinders * (24.24f * (SteamBoosterPressurePSI) * BoosterIdleChokeSizeIn * BoosterIdleChokeSizeIn));
                         HuDBoosterSteamConsumptionLbpS = SteamEngines[i].CylinderSteamUsageLBpS;
 
                     }
                     else
                     {
                         // In run mode steam consumption calculated by cylinder model
                         HuDBoosterSteamConsumptionLbpS = SteamEngines[i].CylinderSteamUsageLBpS;
+                        SteamBoosterPressurePSI = (throttle * InitialPressureDropRatioRpMtoX[pS.TopM(DrvWheelRevRpS)] * BoilerPressurePSI); // equivalent to steam chest pressure
                     }
 
 
@@ -6671,6 +6680,9 @@ public override float GetDataOf(CabViewControl cvc)
                 case CABViewControlTypes.STEAMHEAT_PRESSURE:
                     data = ConvertFromPSI(cvc, CurrentSteamHeatPressurePSI);
                     break;
+                case CABViewControlTypes.STEAM_BOOSTER_PRESSURE:
+                    data = ConvertFromPSI(cvc, SteamChestPressurePSI);
+                    break;
                 case CABViewControlTypes.CUTOFF:
                 case CABViewControlTypes.REVERSER_PLATE:
                     data = Train.MUReverserPercent / 100f;

Source/Orts.Simulation/Simulation/RollingStocks/MSTSWagon.cs

@@ -523,6 +523,11 @@ public virtual void LoadFromWagFile(string wagFilePath)
             if (MSTSWagonNumWheels == 0 && InitWagonNumAxles == 0 )
             {
                 DerailmentCoefficientEnabled = false;
+
+                if (Simulator.Settings.VerboseConfigurationMessages)
+                {
+                    Trace.TraceInformation("Derailment Coefficient set to false for Wagon {0}", WagFilePath);
+                }
             }
 
             // Ensure Drive Axles is set to a default if no OR value added to WAG file
@@ -539,7 +544,7 @@ public virtual void LoadFromWagFile(string wagFilePath)
 
                 if (Simulator.Settings.VerboseConfigurationMessages)
                 {
-                    Trace.TraceInformation("Number of Wagon Axles set to default value of {0}", WagonNumAxles);
+                    Trace.TraceInformation("Number of Wagon Axles set to default value of {0} on Wagon {1}", WagonNumAxles, WagFilePath);
                 }
             }
             else