diff --git a/src/FDM/YASim/Model.cpp b/src/FDM/YASim/Model.cpp
index 70546c9b2..d7bf3f636 100644
--- a/src/FDM/YASim/Model.cpp
+++ b/src/FDM/YASim/Model.cpp
@@ -210,6 +210,13 @@ void Model::setAir(const float pressure, const float temp, const float density)
     _rho = density;
 }
 
+void Model::setAirFromStandardAtmosphere(const float altitude)
+{
+    _pressure = Atmosphere::getStdPressure(altitude);
+    _temp = Atmosphere::getStdTemperature(altitude);
+    _rho = Atmosphere::getStdDensity(altitude);
+}
+
 void Model::updateGround(State* s)
 {
     float dummy[3];
diff --git a/src/FDM/YASim/Model.hpp b/src/FDM/YASim/Model.hpp
index dbb20870f..a57a57ce1 100644
--- a/src/FDM/YASim/Model.hpp
+++ b/src/FDM/YASim/Model.hpp
@@ -70,6 +70,7 @@ public:
     void setGroundEffect(const float* pos, const float span, const float mul);
     void setWind(float* wind) { Math::set3(wind, _wind); }
     void setAir(const float pressure, const float temp, const float density);
+    void setAirFromStandardAtmosphere(const float altitude);
 
     void updateGround(State* s);
 
diff --git a/src/FDM/YASim/yasim-test.cpp b/src/FDM/YASim/yasim-test.cpp
index 5b2b8e2f5..39cac4eba 100644
--- a/src/FDM/YASim/yasim-test.cpp
+++ b/src/FDM/YASim/yasim-test.cpp
@@ -54,9 +54,7 @@ void yasim_graph(Airplane* a, const float alt, const float kts, int cfg = CONFIG
   Model* m = a->getModel();
   State s;
 
-  m->setAir(Atmosphere::getStdPressure(alt),
-  Atmosphere::getStdTemperature(alt),
-  Atmosphere::getStdDensity(alt));
+  m->setAirFromStandardAtmosphere(alt);
 
   switch (cfg) {
     case CONFIG_APPROACH:
@@ -131,9 +129,7 @@ void yasim_drag(Airplane* a, const float aoa, const float alt, int cfg = CONFIG_
   Model* m = a->getModel();
   State s;
   
-  m->setAir(Atmosphere::getStdPressure(alt),
-	    Atmosphere::getStdTemperature(alt),
-	    Atmosphere::getStdDensity(alt));
+  m->setAirFromStandardAtmosphere(alt);
   
   switch (cfg) {
     case CONFIG_APPROACH: