diff --git a/GameData/AJE/Plugins/AJE.dll b/GameData/AJE/Plugins/AJE.dll
index 6ebcf41..d3ef797 100644
Binary files a/GameData/AJE/Plugins/AJE.dll and b/GameData/AJE/Plugins/AJE.dll differ
diff --git a/Source/AJEJet.cs b/Source/AJEJet.cs
index c3f9e8e..a1dcaa4 100644
--- a/Source/AJEJet.cs
+++ b/Source/AJEJet.cs
@@ -106,7 +106,7 @@ public override void CreateEngine()
                 exhaustMixer,
                 adjustableNozzle
                 );
-            useAtmCurve = atmChangeFlow = useVelCurve = false;
+            useAtmCurve = atmChangeFlow = useVelCurve = useAtmCurveIsp = useVelCurveIsp = false;
             maxEngineTemp = maxT3;
             if (autoignitionTemp < 0f || float.IsInfinity(autoignitionTemp))
                 autoignitionTemp = 500f; // Autoignition of Kerosene is 493.15K
diff --git a/Source/AJEPropeller.cs b/Source/AJEPropeller.cs
index ab0a509..be2649a 100644
--- a/Source/AJEPropeller.cs
+++ b/Source/AJEPropeller.cs
@@ -222,6 +222,8 @@ public override void CreateEngine()
                 Fields["netMeredithEffect"].guiActive = false;
 
             Fields["statusL2"].guiActive = true; // always show
+
+            useAtmCurve = atmChangeFlow = useVelCurve = useAtmCurveIsp = useVelCurveIsp = false;
         }
 
         public override void OnStart(StartState state)
diff --git a/Source/AJERotor.cs b/Source/AJERotor.cs
index fe0f2dd..2ace281 100644
--- a/Source/AJERotor.cs
+++ b/Source/AJERotor.cs
@@ -66,7 +66,7 @@ public override void CreateEngine()
             sasY = sas.YawTorque;
             sasR = sas.RollTorque;
 
-            useAtmCurve = atmChangeFlow = useVelCurve = false;
+            useAtmCurve = atmChangeFlow = useVelCurve = useAtmCurveIsp = useVelCurveIsp = false;
         }
 
         #endregion