Straight air engine brakes for tenders

cesarBLG · cesarBLG · commit 1079783ca086 · 2023-02-11T09:31:41.000+01:00
diff --git a/Source/Orts.Simulation/Simulation/RollingStocks/SubSystems/Brakes/MSTS/AirSinglePipe.cs b/Source/Orts.Simulation/Simulation/RollingStocks/SubSystems/Brakes/MSTS/AirSinglePipe.cs
@@ -981,15 +981,14 @@ protected static void PropagateBrakeLinePressures(float elapsedClockSeconds, Tra
                                 if (dp < 0) dp = 0;
                                 loco.MainResPressurePSI -= dp * volumeRatio;
                             }
-                            else // Otherwise, drain from train pipe
+                            else // Otherwise, drain from locomotive engine brake pipe
                             {
-                                float volumeRatio = brakeSystem.GetCylVolumeM3() / brakeSystem.BrakePipeVolumeM3;
-                                if (brakeSystem.BrakeLine2PressurePSI - dp * volumeRatio < p + dp)
+                                if (lead.BrakeSystem.BrakeLine3PressurePSI - dp < p + dp)
                                 {
-                                    dp = (brakeSystem.BrakeLine2PressurePSI - p) / (1 + volumeRatio);
+                                    dp = (lead.BrakeSystem.BrakeLine3PressurePSI - p) / 2;
                                 }
                                 if (dp < 0) dp = 0;
-                                brakeSystem.BrakeLine2PressurePSI -= dp * volumeRatio;
+                                lead.BrakeSystem.BrakeLine3PressurePSI -= dp;
                             }
                             p += dp;
                             lead.EngineBrakeState = ValveState.Apply;

Original file line number	Diff line number	Diff line change
`@@ -981,15 +981,14 @@ protected static void PropagateBrakeLinePressures(float elapsedClockSeconds, Tra`
`981`	`981`	`if (dp < 0) dp = 0;`
`982`	`982`	`loco.MainResPressurePSI -= dp * volumeRatio;`
`983`	`983`	`}`
`984`		`- else // Otherwise, drain from train pipe`
	`984`	`+ else // Otherwise, drain from locomotive engine brake pipe`
`985`	`985`	`{`
`986`		`- float volumeRatio = brakeSystem.GetCylVolumeM3() / brakeSystem.BrakePipeVolumeM3;`
`987`		`- if (brakeSystem.BrakeLine2PressurePSI - dp * volumeRatio < p + dp)`
	`986`	`+ if (lead.BrakeSystem.BrakeLine3PressurePSI - dp < p + dp)`
`988`	`987`	`{`
`989`		`- dp = (brakeSystem.BrakeLine2PressurePSI - p) / (1 + volumeRatio);`
	`988`	`+ dp = (lead.BrakeSystem.BrakeLine3PressurePSI - p) / 2;`
`990`	`989`	`}`
`991`	`990`	`if (dp < 0) dp = 0;`
`992`		`- brakeSystem.BrakeLine2PressurePSI -= dp * volumeRatio;`
	`991`	`+ lead.BrakeSystem.BrakeLine3PressurePSI -= dp;`
`993`	`992`	`}`
`994`	`993`	`p += dp;`
`995`	`994`	`lead.EngineBrakeState = ValveState.Apply;`