diff --git a/src/FDM/JSBSim/FGAerodynamics.cpp b/src/FDM/JSBSim/FGAerodynamics.cpp
index bbcf0eb9c..16bd979fb 100644
--- a/src/FDM/JSBSim/FGAerodynamics.cpp
+++ b/src/FDM/JSBSim/FGAerodynamics.cpp
@@ -71,6 +71,7 @@ FGAerodynamics::FGAerodynamics(FGFDMExec* FDMExec) : FGModel(FDMExec)
   alphahystmin = alphahystmax = 0.0;
   clsq = lod = 0.0;
   alphaw = 0.0;  
+  bi2vel = ci2vel = 0.0;
   bind();
 
   Debug(0);
diff --git a/src/FDM/JSBSim/FGAircraft.cpp b/src/FDM/JSBSim/FGAircraft.cpp
index 5ee4979c0..2e94ecfad 100644
--- a/src/FDM/JSBSim/FGAircraft.cpp
+++ b/src/FDM/JSBSim/FGAircraft.cpp
@@ -106,6 +106,7 @@ FGAircraft::FGAircraft(FGFDMExec* fdmex) : FGModel(fdmex)
   HTailArm  = VTailArm  = 0.0;
   lbarh = lbarv = 0.0;
   vbarh = vbarv = 0.0;
+  WingIncidence = 0.0;
 
   bind();
 
diff --git a/src/FDM/JSBSim/FGCoefficient.cpp b/src/FDM/JSBSim/FGCoefficient.cpp
index 801571f4f..b143fe94e 100644
--- a/src/FDM/JSBSim/FGCoefficient.cpp
+++ b/src/FDM/JSBSim/FGCoefficient.cpp
@@ -83,6 +83,7 @@ FGCoefficient::FGCoefficient( FGFDMExec* fdex )
   totalValue   = 0.0;
   bias = 0.0;
   gain = 1.0;
+  SD = 0.0;
 
   filename.erase();
   description.erase();
diff --git a/src/FDM/JSBSim/FGFDMExec.cpp b/src/FDM/JSBSim/FGFDMExec.cpp
index a4269c7df..a9cdac8e7 100644
--- a/src/FDM/JSBSim/FGFDMExec.cpp
+++ b/src/FDM/JSBSim/FGFDMExec.cpp
@@ -114,7 +114,9 @@ FGFDMExec::FGFDMExec(FGPropertyManager* root)
   frozen = false;
   modelLoaded = false;
   IsSlave = false;
-
+  
+  cout << "FGFDMExec::FGFDMExec, FDMctr: " << FDMctr << endl;
+  
   IdFDM = FDMctr;
   FDMctr++;
   
@@ -130,7 +132,6 @@ FGFDMExec::FGFDMExec(FGPropertyManager* root)
   else            master = root;
 
   instance = master->GetNode("/fdm/jsbsim",IdFDM,true);
-  instance->SetDouble("zero",0);  
   
   Debug(0);
   
@@ -156,7 +157,8 @@ FGFDMExec::~FGFDMExec()
 
   for (unsigned int i=1; i<SlaveFDMList.size(); i++) delete SlaveFDMList[i]->exec;
   SlaveFDMList.clear();
- 
+  cout << "FGFDMExec::~FGFDMExec, FDMctr: " << FDMctr << endl;
+  FDMctr--;
   Debug(1);
 }
 
diff --git a/src/FDM/JSBSim/FGMassBalance.cpp b/src/FDM/JSBSim/FGMassBalance.cpp
index fb279c807..5df0f3c18 100644
--- a/src/FDM/JSBSim/FGMassBalance.cpp
+++ b/src/FDM/JSBSim/FGMassBalance.cpp
@@ -52,6 +52,12 @@ CLASS IMPLEMENTATION
 FGMassBalance::FGMassBalance(FGFDMExec* fdmex) : FGModel(fdmex)
 {
   Name = "FGMassBalance";
+  Weight = EmptyWeight = Mass = 0.0;
+  Ixx = Iyy = Izz = Ixy = Ixz = 0.0;
+  baseIxx = baseIyy = baseIzz = baseIxy = baseIxz = 0.0;
+  vbaseXYZcg(eX) = 0.0;
+  vbaseXYZcg(eY) = 0.0;
+  vbaseXYZcg(eZ) = 0.0;
   bind();
 
   Debug(0);
diff --git a/src/FDM/JSBSim/FGTranslation.cpp b/src/FDM/JSBSim/FGTranslation.cpp
index ad3945255..8c4aa657c 100644
--- a/src/FDM/JSBSim/FGTranslation.cpp
+++ b/src/FDM/JSBSim/FGTranslation.cpp
@@ -82,6 +82,8 @@ FGTranslation::FGTranslation(FGFDMExec* fdmex) : FGModel(fdmex)
 {
   Name = "FGTranslation";
   qbar = 0;
+  qbarUW = 0.0;
+  qbarUV = 0.0;
   Vt = 0.0;
   Mach = 0.0;
   alpha = beta = 0.0;
diff --git a/src/FDM/JSBSim/FGTrim.cpp b/src/FDM/JSBSim/FGTrim.cpp
index e4a5c2ea6..a5fc75d9e 100644
--- a/src/FDM/JSBSim/FGTrim.cpp
+++ b/src/FDM/JSBSim/FGTrim.cpp
@@ -79,7 +79,7 @@ FGTrim::FGTrim(FGFDMExec *FDMExec,FGInitialCondition *FGIC, TrimMode tt ) {
   gamma_fallback=true;
   axis_count=0;
   mode=tt;
-  xlo=xhi=alo=ahi;
+  xlo=xhi=alo=ahi=0.0;
   targetNlf=1.0;
   debug_axis=tAll;
   switch(mode) {
diff --git a/src/FDM/JSBSim/filtersjb/FGKinemat.cpp b/src/FDM/JSBSim/filtersjb/FGKinemat.cpp
index ea91f734d..1bf63e823 100644
--- a/src/FDM/JSBSim/filtersjb/FGKinemat.cpp
+++ b/src/FDM/JSBSim/filtersjb/FGKinemat.cpp
@@ -57,6 +57,7 @@ FGKinemat::FGKinemat(FGFCS* fcs, FGConfigFile* AC_cfg) : FGFCSComponent(fcs),
   TransitionTimes.clear();
   
   OutputPct=0;
+  InTransit=0;
 
   Type = AC_cfg->GetValue("TYPE");
   Name = AC_cfg->GetValue("NAME");