diff --git a/src/FDM/YASim/Airplane.cpp b/src/FDM/YASim/Airplane.cpp
index 1b69c2ce7..a33067d24 100644
--- a/src/FDM/YASim/Airplane.cpp
+++ b/src/FDM/YASim/Airplane.cpp
@@ -370,7 +370,7 @@ float Airplane::compileWing(Wing* w)
       _wingsN->getNode("wing-span", true)->setFloatValue(w->getSpan());
       _wingsN->getNode("wing-area", true)->setFloatValue(w->getArea());
       _wingsN->getNode("aspect-ratio", true)->setFloatValue(w->getAspectRatio());
-      _wingsN->getNode("mean-chord", true)->setFloatValue(w->getMAC());
+      _wingsN->getNode("standard-mean-chord", true)->setFloatValue(w->getSMC());
     }
 
     float wgt = 0;
diff --git a/src/FDM/YASim/Wing.hpp b/src/FDM/YASim/Wing.hpp
index 1ee775d67..d757f8236 100644
--- a/src/FDM/YASim/Wing.hpp
+++ b/src/FDM/YASim/Wing.hpp
@@ -73,7 +73,7 @@ public:
     float getSpan() { return _wingspan; };
     float getArea() { return _wingspan*_meanChord; };
     float getAspectRatio() { return _aspectRatio; };
-    float getMAC() { return _meanChord; };
+    float getSMC() { return _meanChord; };
     
     int numSurfaces() { return _surfs.size(); }
     Surface* getSurface(int n) { return ((SurfRec*)_surfs.get(n))->surface; }
@@ -113,7 +113,7 @@ private:
     
     // calculated from above
     float _tip[3];
-    float _meanChord;
+    float _meanChord; // std. mean chord
     float _wingspan;
     float _aspectRatio;