diff --git a/src/FDM/YASim/Airplane.hpp b/src/FDM/YASim/Airplane.hpp
index 3aee7c224..d985d6734 100644
--- a/src/FDM/YASim/Airplane.hpp
+++ b/src/FDM/YASim/Airplane.hpp
@@ -43,7 +43,7 @@ public:
     void addVStab(Wing* vstab) { _vstabs.add(vstab); }
 
     void addFuselage(float* front, float* back, float width,
-                     float taper=1, float mid=0.5,
+                     float taper=1, float mid=0.5f,
                      float cx=1, float cy=1, float cz=1, float idrag=1);
     int addTank(float* pos, float cap, float fuelDensity);
     void addGear(Gear* g);
diff --git a/src/FDM/YASim/Surface.hpp b/src/FDM/YASim/Surface.hpp
index 6114dc26f..278c05a83 100644
--- a/src/FDM/YASim/Surface.hpp
+++ b/src/FDM/YASim/Surface.hpp
@@ -100,7 +100,7 @@ private:
     float _cz0 {0};       // Z-axis force offset
     float _peaks[2] {1, 1};  // Stall peak coefficients (fwd, back)
     float _stalls[4] {0, 0, 0, 0}; // Stall angles (fwd/back, pos/neg)
-    float _widths[4] {0.01, 0.01, 0.01, 0.01}; // Stall widths  " "
+    float _widths[4] {0.01f, 0.01f, 0.01f, 0.01f}; // Stall widths
     float _pos[3];    // position in local coords
     float _orient[9]; // local->surface orthonormal matrix
 
diff --git a/src/FDM/YASim/yasim-common.hpp b/src/FDM/YASim/yasim-common.hpp
index 6f2678087..ed1c4f018 100644
--- a/src/FDM/YASim/yasim-common.hpp
+++ b/src/FDM/YASim/yasim-common.hpp
@@ -2,32 +2,32 @@
 #define _YASIM_COMMON_HPP
 
 namespace yasim {
-  static const float YASIM_PI = 3.14159265358979323846;
+  static const float YASIM_PI = 3.14159265358979323846f;
   static const float PI2 = YASIM_PI*2;
   static const float RAD2DEG = 180/YASIM_PI;
   static const float DEG2RAD = YASIM_PI/180;
   static const float RPM2RAD = YASIM_PI/30;
 
-  static const float KTS2MPS = 1852.0/3600.0;
-  static const float MPS2KTS = 3600.0/1852.0;
-  static const float KMH2MPS = 1/3.6;
+  static const float KTS2MPS = 1852.0f/3600.0f;
+  static const float MPS2KTS = 3600.0f/1852.0f;
+  static const float KMH2MPS = 1/3.6f;
 
-  static const float FT2M = 0.3048;
+  static const float FT2M = 0.3048f;
   static const float M2FT = 1/FT2M;
 
-  static const float LBS2N = 4.44822;
+  static const float LBS2N = 4.44822f;
   static const float N2LB = 1/LBS2N;
-  static const float LBS2KG = 0.45359237;
+  static const float LBS2KG = 0.45359237f;
   static const float KG2LBS = 1/LBS2KG;
-  static const float CM2GALS = 264.172037284;
-  static const float HP2W = 745.700;
-  static const float INHG2PA = 3386.389;
-  static const float K2DEGF = 1.8;
-  static const float K2DEGFOFFSET = -459.4;
-  static const float CIN2CM = 1.6387064e-5;
+  static const float CM2GALS = 264.172037284f;
+  static const float HP2W = 745.700f;
+  static const float INHG2PA = 3386.389f;
+  static const float K2DEGF = 1.8f;
+  static const float K2DEGFOFFSET = -459.4f;
+  static const float CIN2CM = 1.6387064e-5f;
   
   static const float NM2FTLB = (1/(LBS2N*FT2M));
-  static const float SLUG2KG = 14.59390;
+  static const float SLUG2KG = 14.59390f;
     
 };