add engine drag power to databus interface

VectoCore/Models/Simulation/DataBus/IEngineInfo.cs

@@ -45,6 +45,8 @@ namespace TUGraz.VectoCore.Models.Simulation.DataBus
 
 		Watt EngineStationaryFullPower(PerSecond angularSpeed);
 
+		Watt EngineDragPower(PerSecond angularSpeed);
+
 		PerSecond EngineIdleSpeed { get; }
 
 

VectoCore/Models/Simulation/Impl/VehicleContainer.cs

@@ -127,6 +127,11 @@ namespace TUGraz.VectoCore.Models.Simulation.Impl
 			return Engine.EngineStationaryFullPower(angularSpeed);
 		}
 
+		public Watt EngineDragPower(PerSecond angularSpeed)
+		{
+			return Engine.EngineDragPower(angularSpeed);
+		}
+
 		public PerSecond EngineIdleSpeed
 		{
 			get { return Engine.EngineIdleSpeed; }

VectoCore/Models/SimulationComponent/Impl/CombustionEngine.cs

@@ -104,6 +104,11 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
 			return ModelData.FullLoadCurve.FullLoadStationaryTorque(angularSpeed) * angularSpeed;
 		}
 
+		public Watt EngineDragPower(PerSecond angularSpeed)
+		{
+			return ModelData.FullLoadCurve.DragLoadStationaryPower(angularSpeed);
+		}
+
 		public PerSecond EngineIdleSpeed
 		{
 			get { return ModelData.IdleSpeed; }