diff --git a/src/FDM/JSBSim/FGSimTurbine.cpp b/src/FDM/JSBSim/FGSimTurbine.cpp
index 69fca04a9..c6f00f64e 100644
--- a/src/FDM/JSBSim/FGSimTurbine.cpp
+++ b/src/FDM/JSBSim/FGSimTurbine.cpp
@@ -155,6 +155,14 @@ double FGSimTurbine::CalcFuelNeed(void)
   return FuelFlow_pph /3600 * State->Getdt() * Propulsion->GetRate();
 }
 
+//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+double FGSimTurbine::GetPowerAvailable(void) {
+  if( throttle <= 0.77 )
+    return 64.94*throttle;
+  else
+    return 217.38*throttle - 117.38;
+}
 
 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
diff --git a/src/FDM/JSBSim/FGSimTurbine.h b/src/FDM/JSBSim/FGSimTurbine.h
index 76e79624f..6233ba6a6 100644
--- a/src/FDM/JSBSim/FGSimTurbine.h
+++ b/src/FDM/JSBSim/FGSimTurbine.h
@@ -63,6 +63,7 @@ public:
 
   double Calculate(double);
   double CalcFuelNeed(void);
+  double GetPowerAvailable(void);
   
 private:
 
diff --git a/src/FDM/JSBSim/FGTurbine.h b/src/FDM/JSBSim/FGTurbine.h
index 9f660a444..31e662913 100644
--- a/src/FDM/JSBSim/FGTurbine.h
+++ b/src/FDM/JSBSim/FGTurbine.h
@@ -62,6 +62,7 @@ public:
   ~FGTurbine();
 
   double Calculate(double);
+  double GetPowerAvailable(void) { return PowerCommand; }
 
 private:
   typedef vector<FGCoefficient*> CoeffArray;