diff --git a/src/FDM/JSBSim/FGAerodynamics.cpp b/src/FDM/JSBSim/FGAerodynamics.cpp
index d4e946a67..cbffadc97 100644
--- a/src/FDM/JSBSim/FGAerodynamics.cpp
+++ b/src/FDM/JSBSim/FGAerodynamics.cpp
@@ -37,6 +37,9 @@ INCLUDES
 
 #include "FGAerodynamics.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_AERODYNAMICS;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGAerodynamics.h b/src/FDM/JSBSim/FGAerodynamics.h
index 9bf17e08e..f448203a3 100644
--- a/src/FDM/JSBSim/FGAerodynamics.h
+++ b/src/FDM/JSBSim/FGAerodynamics.h
@@ -55,6 +55,8 @@ INCLUDES
 
 #include "FGModel.h"
 
+#define ID_AERODYNAMICS "$Header$"
+
 /*******************************************************************************
 CLASS DECLARATION
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGAircraft.cpp b/src/FDM/JSBSim/FGAircraft.cpp
index b0639ec3c..debb1d9ee 100644
--- a/src/FDM/JSBSim/FGAircraft.cpp
+++ b/src/FDM/JSBSim/FGAircraft.cpp
@@ -128,8 +128,8 @@ INCLUDES
 #include "FGAuxiliary.h"
 #include "FGOutput.h"
 
-const char *IdSrc = "$Header$";
-const char *IdHdr = ID_AIRCRAFT;
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_AIRCRAFT;
 
 /*******************************************************************************
 ************************************ CODE **************************************
diff --git a/src/FDM/JSBSim/FGAircraft.h b/src/FDM/JSBSim/FGAircraft.h
index 46972cc5f..b8fe04ca5 100644
--- a/src/FDM/JSBSim/FGAircraft.h
+++ b/src/FDM/JSBSim/FGAircraft.h
@@ -133,6 +133,18 @@ DEFINITIONS
     aerodynamic and mass properties, landing gear, etc.
     @author Jon S. Berndt
     @version $Id$
+    @see
+     [1] Cooke, Zyda, Pratt, and McGhee, "NPSNET: Flight Simulation Dynamic Modeling
+	   Using Quaternions", Presence, Vol. 1, No. 4, pp. 404-420  Naval Postgraduate
+	   School, January 1994
+     [2] D. M. Henderson, "Euler Angles, Quaternions, and Transformation Matrices",
+     JSC 12960, July 1977
+     [3] Richard E. McFarland, "A Standard Kinematic Model for Flight Simulation at
+     NASA-Ames", NASA CR-2497, January 1975
+     [4] Barnes W. McCormick, "Aerodynamics, Aeronautics, and Flight Mechanics",
+     Wiley & Sons, 1979 ISBN 0-471-03032-5
+     [5] Bernard Etkin, "Dynamics of Flight, Stability and Control", Wiley & Sons,
+     1982 ISBN 0-471-08936-2
   */
 
 /*******************************************************************************
@@ -150,6 +162,7 @@ public:
       @param Executive a pointer to the parent executive object
     */
   FGAircraft(FGFDMExec *Executive);
+  
   /// Destructor
   ~FGAircraft(void);
 
@@ -158,6 +171,7 @@ public:
       @return bool returns false if no error
     */
   bool Run(void);
+  
   /** Loads the aircraft.
       The executive calls this method to load the aircraft into JSBSim.
       @param apath path to the aircraft files (e.g. "aircraft/X15/")
@@ -166,7 +180,12 @@ public:
       @return true if succesful
     */
   bool LoadAircraft(string apath, string epath, string acname);
+  
+  /** Retrieves the aircraft name
+      @return the name of the aircraft as a string type
+    */
   inline string GetAircraftName(void) { return AircraftName; }
+  
   inline void SetGearUp(bool tt) { GearUp = tt; }
   inline bool GetGearUp(void) { return GearUp; }
   inline int GetNumGearUnits(void) { return lGear.size(); }
diff --git a/src/FDM/JSBSim/FGAtmosphere.cpp b/src/FDM/JSBSim/FGAtmosphere.cpp
index 35d1b1d6a..3dc6810ac 100644
--- a/src/FDM/JSBSim/FGAtmosphere.cpp
+++ b/src/FDM/JSBSim/FGAtmosphere.cpp
@@ -59,6 +59,9 @@ INCLUDES
 #include "FGDefs.h"
 #include "FGMatrix.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_ATMOSPHERE;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGAtmosphere.h b/src/FDM/JSBSim/FGAtmosphere.h
index 4457caac0..678c1761e 100644
--- a/src/FDM/JSBSim/FGAtmosphere.h
+++ b/src/FDM/JSBSim/FGAtmosphere.h
@@ -45,6 +45,8 @@ INCLUDES
 #include "FGModel.h"
 #include "FGMatrix.h"
 
+#define ID_ATMOSPHERE "$Header$"
+
 /*******************************************************************************
 COMMENTS, REFERENCES,  and NOTES
 ********************************************************************************
diff --git a/src/FDM/JSBSim/FGAuxiliary.cpp b/src/FDM/JSBSim/FGAuxiliary.cpp
index 71cf25b26..4b6d09169 100644
--- a/src/FDM/JSBSim/FGAuxiliary.cpp
+++ b/src/FDM/JSBSim/FGAuxiliary.cpp
@@ -52,6 +52,9 @@ INCLUDES
 #include "FGOutput.h"
 #include "FGMatrix.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_AUXILIARY;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGAuxiliary.h b/src/FDM/JSBSim/FGAuxiliary.h
index 845e6e4fc..12cdabdd0 100644
--- a/src/FDM/JSBSim/FGAuxiliary.h
+++ b/src/FDM/JSBSim/FGAuxiliary.h
@@ -42,6 +42,8 @@ INCLUDES
 #include "FGModel.h"
 #include "FGMatrix.h"
 
+#define ID_AUXILIARY "$Header"
+
 /*******************************************************************************
 DEFINES
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGCoefficient.cpp b/src/FDM/JSBSim/FGCoefficient.cpp
index 7b013436d..a87a0ff31 100644
--- a/src/FDM/JSBSim/FGCoefficient.cpp
+++ b/src/FDM/JSBSim/FGCoefficient.cpp
@@ -48,6 +48,9 @@ INCLUDES
 #include "FGState.h"
 #include "FGFDMExec.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = "ID_COEFFICIENT";
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGCoefficient.h b/src/FDM/JSBSim/FGCoefficient.h
index aab3d957a..cfb59f11f 100644
--- a/src/FDM/JSBSim/FGCoefficient.h
+++ b/src/FDM/JSBSim/FGCoefficient.h
@@ -51,6 +51,8 @@ INCLUDES
 DEFINES
 *******************************************************************************/
 
+#define ID_COEFFICIENT "$Header"
+
 /*******************************************************************************
 FORWARD DECLARATIONS
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGConfigFile.cpp b/src/FDM/JSBSim/FGConfigFile.cpp
index 185ef985c..284326227 100644
--- a/src/FDM/JSBSim/FGConfigFile.cpp
+++ b/src/FDM/JSBSim/FGConfigFile.cpp
@@ -21,6 +21,9 @@ INCLUDES
 #include <stdlib.h>
 #include <math.h>
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = "ID_CONFIGFILE";
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGConfigFile.h b/src/FDM/JSBSim/FGConfigFile.h
index c66be534c..081b77dc7 100644
--- a/src/FDM/JSBSim/FGConfigFile.h
+++ b/src/FDM/JSBSim/FGConfigFile.h
@@ -56,6 +56,8 @@ INCLUDES
 DEFINES
 *******************************************************************************/
 
+#define ID_CONFIGFILE "$Header"
+
 using std::string;
 using std::ifstream;
 
diff --git a/src/FDM/JSBSim/FGControls.cpp b/src/FDM/JSBSim/FGControls.cpp
index 333b3f69b..0bf85cb14 100644
--- a/src/FDM/JSBSim/FGControls.cpp
+++ b/src/FDM/JSBSim/FGControls.cpp
@@ -24,6 +24,8 @@
 
 #include "FGControls.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = "ID_CONTROLS";
 
 FGControls controls;
 
@@ -51,10 +53,11 @@ FGControls::~FGControls() {
 
 
 // $Log$
-// Revision 1.18  2000/10/13 21:34:57  curt
-// Panel tweaks to support "shaped" panels.
-// Additional HUD support for waypoints.
-// JSBSim updates.
+// Revision 1.19  2000/10/14 00:10:12  curt
+// Friday the 13th JSBSim update ... :-0  !!!
+//
+// Revision 1.4  2000/10/13 19:21:02  jsb
+// ** JSB ** Added version identifiers for all files
 //
 // Revision 1.3  2000/04/26 10:55:57  jsb
 // Made changes as required by Curt to install JSBSim into FGFS
diff --git a/src/FDM/JSBSim/FGControls.h b/src/FDM/JSBSim/FGControls.h
index 9de1e3039..bf7251767 100644
--- a/src/FDM/JSBSim/FGControls.h
+++ b/src/FDM/JSBSim/FGControls.h
@@ -25,11 +25,12 @@
 #ifndef _CONTROLS_HXX
 #define _CONTROLS_HXX
 
-
 #ifndef __cplusplus                                                          
 # error This library requires C++
 #endif                                   
 
+#define ID_CONTROLS "$Header"
+
 // Define a structure containing the control parameters
 
 class FGControls {
@@ -177,10 +178,11 @@ extern FGControls controls;
 
 
 // $Log$
-// Revision 1.17  2000/10/13 21:34:58  curt
-// Panel tweaks to support "shaped" panels.
-// Additional HUD support for waypoints.
-// JSBSim updates.
+// Revision 1.18  2000/10/14 00:10:12  curt
+// Friday the 13th JSBSim update ... :-0  !!!
+//
+// Revision 1.7  2000/10/13 19:21:02  jsb
+// ** JSB ** Added version identifiers for all files
 //
 // Revision 1.6  2000/06/03 13:59:52  jsb
 // Changes for compatibility with MSVC
diff --git a/src/FDM/JSBSim/FGEngine.cpp b/src/FDM/JSBSim/FGEngine.cpp
index 0315e99d2..5e673eabf 100644
--- a/src/FDM/JSBSim/FGEngine.cpp
+++ b/src/FDM/JSBSim/FGEngine.cpp
@@ -62,6 +62,9 @@ INCLUDES
 #include "FGOutput.h"
 #include "FGDefs.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = "ID_ENGINE";
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGEngine.h b/src/FDM/JSBSim/FGEngine.h
index 96d71f622..b75910dcc 100644
--- a/src/FDM/JSBSim/FGEngine.h
+++ b/src/FDM/JSBSim/FGEngine.h
@@ -56,6 +56,8 @@ FG_USING_STD(string);
 DEFINES
 *******************************************************************************/
 
+#define ID_ENGINE "$Header"
+
 using std::string;
 
 /*******************************************************************************
diff --git a/src/FDM/JSBSim/FGFCS.cpp b/src/FDM/JSBSim/FGFCS.cpp
index 2a39dac5c..0725df45e 100644
--- a/src/FDM/JSBSim/FGFCS.cpp
+++ b/src/FDM/JSBSim/FGFCS.cpp
@@ -56,6 +56,9 @@ INCLUDES
 #include "filtersjb/FGSummer.h"
 #include "filtersjb/FGFlaps.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = "ID_FCS";
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGFCS.h b/src/FDM/JSBSim/FGFCS.h
index 8c669c03e..c2288fe16 100644
--- a/src/FDM/JSBSim/FGFCS.h
+++ b/src/FDM/JSBSim/FGFCS.h
@@ -54,6 +54,8 @@ INCLUDES
 #include "FGModel.h"
 #include "FGConfigFile.h"
 
+#define ID_FCS "$Header"
+
 /*******************************************************************************
 CLASS DECLARATION
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGFDMExec.cpp b/src/FDM/JSBSim/FGFDMExec.cpp
index 6c936cf44..9aa740f6a 100644
--- a/src/FDM/JSBSim/FGFDMExec.cpp
+++ b/src/FDM/JSBSim/FGFDMExec.cpp
@@ -63,6 +63,9 @@ INCLUDES
 #include "FGAuxiliary.h"
 #include "FGOutput.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = "ID_FDMEXEC";
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGFDMExec.h b/src/FDM/JSBSim/FGFDMExec.h
index b2289e2bd..b17b35057 100644
--- a/src/FDM/JSBSim/FGFDMExec.h
+++ b/src/FDM/JSBSim/FGFDMExec.h
@@ -41,6 +41,8 @@ SENTRY
 INCLUDES
 *******************************************************************************/
 
+#define ID_FDMEXEC "$Header"
+
 #include "FGModel.h"
 #include "FGInitialCondition.h"
 
diff --git a/src/FDM/JSBSim/FGForce.cpp b/src/FDM/JSBSim/FGForce.cpp
index 7a12a2f69..0b596d1a2 100644
--- a/src/FDM/JSBSim/FGForce.cpp
+++ b/src/FDM/JSBSim/FGForce.cpp
@@ -47,6 +47,8 @@ and the cg.
 #include "FGDefs.h"
 #include "FGForce.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = "ID_FORCE";
 
 FGForce::FGForce(FGFDMExec *FDMExec) :
     vFn(3),
diff --git a/src/FDM/JSBSim/FGForce.h b/src/FDM/JSBSim/FGForce.h
index 5734d601c..8bb2f5578 100644
--- a/src/FDM/JSBSim/FGForce.h
+++ b/src/FDM/JSBSim/FGForce.h
@@ -57,6 +57,8 @@ SENTRY
 INCLUDES
 *******************************************************************************/
 
+#define ID_FORCE "$Header"
+
 #include "FGFDMExec.h"
 #include "FGMatrix.h"
 
diff --git a/src/FDM/JSBSim/FGGroundReactions.cpp b/src/FDM/JSBSim/FGGroundReactions.cpp
index 10a4aeb71..085c8e6fa 100644
--- a/src/FDM/JSBSim/FGGroundReactions.cpp
+++ b/src/FDM/JSBSim/FGGroundReactions.cpp
@@ -37,6 +37,9 @@ INCLUDES
 
 #include "FGGroundReactions.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_GROUNDREACTIONS;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGGroundReactions.h b/src/FDM/JSBSim/FGGroundReactions.h
index 61315bc22..645556974 100644
--- a/src/FDM/JSBSim/FGGroundReactions.h
+++ b/src/FDM/JSBSim/FGGroundReactions.h
@@ -55,6 +55,8 @@ INCLUDES
 
 #include "FGModel.h"
 
+#define ID_GROUNDREACTIONS "$Header"
+
 /*******************************************************************************
 CLASS DECLARATION
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGInertial.cpp b/src/FDM/JSBSim/FGInertial.cpp
index e2c865ec4..36e54c69b 100644
--- a/src/FDM/JSBSim/FGInertial.cpp
+++ b/src/FDM/JSBSim/FGInertial.cpp
@@ -37,6 +37,9 @@ INCLUDES
 
 #include "FGInertial.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_INERTIAL;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGInertial.h b/src/FDM/JSBSim/FGInertial.h
index 856b94c01..115dbb716 100644
--- a/src/FDM/JSBSim/FGInertial.h
+++ b/src/FDM/JSBSim/FGInertial.h
@@ -56,6 +56,8 @@ INCLUDES
 #include "FGModel.h"
 #include "FGConfigFile.h"
 
+#define ID_INERTIAL "$Header"
+
 /*******************************************************************************
 CLASS DECLARATION
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGInitialCondition.cpp b/src/FDM/JSBSim/FGInitialCondition.cpp
index 53edce96d..a792b4c60 100644
--- a/src/FDM/JSBSim/FGInitialCondition.cpp
+++ b/src/FDM/JSBSim/FGInitialCondition.cpp
@@ -55,6 +55,9 @@ INCLUDES
 #include "FGOutput.h"
 #include "FGDefs.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_INITIALCONDITION;
+
 FGInitialCondition::FGInitialCondition(FGFDMExec *FDMExec) {
   vt=vc=ve=0;
   mach=0;
diff --git a/src/FDM/JSBSim/FGInitialCondition.h b/src/FDM/JSBSim/FGInitialCondition.h
index f4c33ce74..00f195c5b 100644
--- a/src/FDM/JSBSim/FGInitialCondition.h
+++ b/src/FDM/JSBSim/FGInitialCondition.h
@@ -53,6 +53,8 @@ INCLUDES
 #include "FGAtmosphere.h"
 #include "FGMatrix.h"
 
+#define ID_INITIALCONDITION "$Header"
+
 /*******************************************************************************
 CLASS DECLARATION
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGLGear.cpp b/src/FDM/JSBSim/FGLGear.cpp
index 9aeca8fdf..6858c969c 100644
--- a/src/FDM/JSBSim/FGLGear.cpp
+++ b/src/FDM/JSBSim/FGLGear.cpp
@@ -39,6 +39,9 @@ INCLUDES
 #include "FGLGear.h"
 #include <algorithm>
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_LGEAR;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGLGear.h b/src/FDM/JSBSim/FGLGear.h
index 9e8c46e16..be4abad6f 100644
--- a/src/FDM/JSBSim/FGLGear.h
+++ b/src/FDM/JSBSim/FGLGear.h
@@ -68,6 +68,8 @@ INCLUDES
 DEFINITIONS
 *******************************************************************************/
 
+#define ID_LGEAR "$Header"
+
 /*******************************************************************************
 CLASS DECLARATION
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGMassBalance.cpp b/src/FDM/JSBSim/FGMassBalance.cpp
index 4e534a54b..f9cdd9cbc 100644
--- a/src/FDM/JSBSim/FGMassBalance.cpp
+++ b/src/FDM/JSBSim/FGMassBalance.cpp
@@ -40,6 +40,9 @@ INCLUDES
 
 #include "FGMassBalance.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_MASSBALANCE;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGMassBalance.h b/src/FDM/JSBSim/FGMassBalance.h
index 4d6ac9d79..ca75b0fd7 100644
--- a/src/FDM/JSBSim/FGMassBalance.h
+++ b/src/FDM/JSBSim/FGMassBalance.h
@@ -44,6 +44,8 @@ INCLUDES
 
 #include "FGModel.h"
 
+#define ID_MASSBALANCE "$Header"
+
 /*******************************************************************************
 CLASS DECLARATION
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGMatrix.cpp b/src/FDM/JSBSim/FGMatrix.cpp
index 5b4f5da10..6671a3e45 100644
--- a/src/FDM/JSBSim/FGMatrix.cpp
+++ b/src/FDM/JSBSim/FGMatrix.cpp
@@ -20,6 +20,9 @@ INCLUDES
 
 #include "FGMatrix.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_MATRIX;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGMatrix.h b/src/FDM/JSBSim/FGMatrix.h
index d62e1dbeb..98a9f9457 100644
--- a/src/FDM/JSBSim/FGMatrix.h
+++ b/src/FDM/JSBSim/FGMatrix.h
@@ -40,6 +40,8 @@ INCLUDES
 
 #include <string>
 
+#define ID_MATRIX "$Header"
+
 /*******************************************************************************
 FORWARD DECLARATIONS
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGModel.cpp b/src/FDM/JSBSim/FGModel.cpp
index 95807830d..bc148164d 100644
--- a/src/FDM/JSBSim/FGModel.cpp
+++ b/src/FDM/JSBSim/FGModel.cpp
@@ -50,6 +50,9 @@ INCLUDES
 #include "FGAuxiliary.h"
 #include "FGOutput.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_MODEL;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGModel.h b/src/FDM/JSBSim/FGModel.h
index c42f90753..55aaffe1e 100644
--- a/src/FDM/JSBSim/FGModel.h
+++ b/src/FDM/JSBSim/FGModel.h
@@ -53,6 +53,8 @@ INCLUDES
 
 #include <string>
 
+#define ID_MODEL "$Header$"
+
 /*******************************************************************************
 DEFINES
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGNozzle.cpp b/src/FDM/JSBSim/FGNozzle.cpp
index 838b068be..d1ec626e2 100644
--- a/src/FDM/JSBSim/FGNozzle.cpp
+++ b/src/FDM/JSBSim/FGNozzle.cpp
@@ -37,6 +37,9 @@ INCLUDES
 
 #include "FGNozzle.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_NOZZLE;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGOutput.cpp b/src/FDM/JSBSim/FGOutput.cpp
index ff0b07c90..e61bf5a40 100644
--- a/src/FDM/JSBSim/FGOutput.cpp
+++ b/src/FDM/JSBSim/FGOutput.cpp
@@ -49,6 +49,9 @@ INCLUDES
 #include "FGPosition.h"
 #include "FGAuxiliary.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_OUTPUT;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGOutput.h b/src/FDM/JSBSim/FGOutput.h
index 6fcffde76..60a3b99f9 100644
--- a/src/FDM/JSBSim/FGOutput.h
+++ b/src/FDM/JSBSim/FGOutput.h
@@ -56,6 +56,8 @@ INCLUDES
 
 #include "FGfdmSocket.h"
 
+#define ID_OUTPUT "$Header$"
+
 /*******************************************************************************
 CLASS DECLARATION
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGPiston.cpp b/src/FDM/JSBSim/FGPiston.cpp
index 0982ca2b7..186ee1c3d 100644
--- a/src/FDM/JSBSim/FGPiston.cpp
+++ b/src/FDM/JSBSim/FGPiston.cpp
@@ -40,6 +40,9 @@ INCLUDES
 
 #include "FGPiston.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_PISTON;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGPosition.cpp b/src/FDM/JSBSim/FGPosition.cpp
index 61bcca2ce..9fadd6ccb 100644
--- a/src/FDM/JSBSim/FGPosition.cpp
+++ b/src/FDM/JSBSim/FGPosition.cpp
@@ -78,6 +78,9 @@ INCLUDES
 #include "FGAuxiliary.h"
 #include "FGOutput.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_POSITION;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGPosition.h b/src/FDM/JSBSim/FGPosition.h
index dcd6258d6..354f61944 100644
--- a/src/FDM/JSBSim/FGPosition.h
+++ b/src/FDM/JSBSim/FGPosition.h
@@ -45,6 +45,17 @@ INCLUDES
 #include "FGModel.h"
 #include "FGMatrix.h"
 
+#define ID_POSITION "$Header$"
+
+
+/*******************************************************************************
+DEFINITIONS
+*******************************************************************************/
+
+/** Models the lateral and longitudinal translational EOM.
+    @author Jon S. Berndt
+    @version $Id$
+  */
 /*******************************************************************************
 CLASS DECLARATION
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGPropeller.cpp b/src/FDM/JSBSim/FGPropeller.cpp
index 9296649c9..0f7442a01 100644
--- a/src/FDM/JSBSim/FGPropeller.cpp
+++ b/src/FDM/JSBSim/FGPropeller.cpp
@@ -37,6 +37,9 @@ INCLUDES
 
 #include "FGPropeller.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_PROPELLER;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGPropeller.h b/src/FDM/JSBSim/FGPropeller.h
index 1d85a3c4c..12b6330d3 100644
--- a/src/FDM/JSBSim/FGPropeller.h
+++ b/src/FDM/JSBSim/FGPropeller.h
@@ -44,6 +44,8 @@ INCLUDES
 
 #include "FGThruster.h"
 
+#define ID_PROPELLER "$Header$"
+
 /*******************************************************************************
 CLASS DECLARATION
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGPropulsion.cpp b/src/FDM/JSBSim/FGPropulsion.cpp
index 07574f56d..818892df4 100644
--- a/src/FDM/JSBSim/FGPropulsion.cpp
+++ b/src/FDM/JSBSim/FGPropulsion.cpp
@@ -58,6 +58,9 @@ INCLUDES
 
 #include "FGPropulsion.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_PROPULSION;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGPropulsion.h b/src/FDM/JSBSim/FGPropulsion.h
index 3cad5a133..c1255d671 100644
--- a/src/FDM/JSBSim/FGPropulsion.h
+++ b/src/FDM/JSBSim/FGPropulsion.h
@@ -38,6 +38,8 @@ SENTRY
 #ifndef FGPROPULSION_H
 #define FGPROPULSION_H
 
+#declare ID_PROPULSION "$Header$"
+
 /*******************************************************************************
 INCLUDES
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGRocket.cpp b/src/FDM/JSBSim/FGRocket.cpp
index 6a219f802..1957d1df7 100644
--- a/src/FDM/JSBSim/FGRocket.cpp
+++ b/src/FDM/JSBSim/FGRocket.cpp
@@ -40,6 +40,9 @@ INCLUDES
 
 #include "FGRocket.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_ROCKET;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGRocket.h b/src/FDM/JSBSim/FGRocket.h
index 119b20045..7336e959d 100644
--- a/src/FDM/JSBSim/FGRocket.h
+++ b/src/FDM/JSBSim/FGRocket.h
@@ -44,6 +44,8 @@ INCLUDES
 
 #include "FGEngine.h"
 
+#define ID_ROCKET "$Header$"
+
 /*******************************************************************************
 CLASS DECLARATION
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGRotation.cpp b/src/FDM/JSBSim/FGRotation.cpp
index 70852f0d0..b482da41a 100644
--- a/src/FDM/JSBSim/FGRotation.cpp
+++ b/src/FDM/JSBSim/FGRotation.cpp
@@ -66,6 +66,9 @@ INCLUDES
 #include "FGAuxiliary.h"
 #include "FGOutput.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_ROTATION;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGRotation.h b/src/FDM/JSBSim/FGRotation.h
index f40d54930..a02b84032 100644
--- a/src/FDM/JSBSim/FGRotation.h
+++ b/src/FDM/JSBSim/FGRotation.h
@@ -75,6 +75,8 @@ INCLUDES
 #include "FGModel.h"
 #include "FGMatrix.h"
 
+#define ID_ROTATION "$Header$"
+
 /*******************************************************************************
 CLASS DECLARATION
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGRotor.cpp b/src/FDM/JSBSim/FGRotor.cpp
index 4ea2064f1..f45e13328 100644
--- a/src/FDM/JSBSim/FGRotor.cpp
+++ b/src/FDM/JSBSim/FGRotor.cpp
@@ -37,6 +37,9 @@ INCLUDES
 
 #include "FGRotor.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_ROTOR;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGRotor.h b/src/FDM/JSBSim/FGRotor.h
index 1ec4d7746..14df54e41 100644
--- a/src/FDM/JSBSim/FGRotor.h
+++ b/src/FDM/JSBSim/FGRotor.h
@@ -44,6 +44,8 @@ INCLUDES
 
 #include "FGThruster.h"
 
+#define ID_ROTOR "$Header$"
+
 /*******************************************************************************
 CLASS DECLARATION
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGState.cpp b/src/FDM/JSBSim/FGState.cpp
index b7649a405..f383f72b3 100644
--- a/src/FDM/JSBSim/FGState.cpp
+++ b/src/FDM/JSBSim/FGState.cpp
@@ -63,6 +63,9 @@ INCLUDES
 #include "FGAuxiliary.h"
 #include "FGOutput.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_STATE;
+
 /*******************************************************************************
 MACROS
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGState.h b/src/FDM/JSBSim/FGState.h
index 10896b4f5..1d8183395 100644
--- a/src/FDM/JSBSim/FGState.h
+++ b/src/FDM/JSBSim/FGState.h
@@ -65,6 +65,8 @@ INCLUDES
 DEFINES
 *******************************************************************************/
 
+#define ID_STATE "$Header$"
+
 /*******************************************************************************
 CLASS DECLARATION
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGTank.cpp b/src/FDM/JSBSim/FGTank.cpp
index 12fdf2ae0..922ff8d0d 100644
--- a/src/FDM/JSBSim/FGTank.cpp
+++ b/src/FDM/JSBSim/FGTank.cpp
@@ -35,8 +35,12 @@ HISTORY
 ********************************************************************************
 INCLUDES
 *******************************************************************************/
+
 #include "FGTank.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_TANK;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGTank.h b/src/FDM/JSBSim/FGTank.h
index 167c815e3..5e767c893 100644
--- a/src/FDM/JSBSim/FGTank.h
+++ b/src/FDM/JSBSim/FGTank.h
@@ -55,6 +55,8 @@ INCLUDES
 DEFINES
 *******************************************************************************/
 
+#define ID_TANK "$Header"
+
 /*******************************************************************************
 CLASS DECLARATION
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGThruster.cpp b/src/FDM/JSBSim/FGThruster.cpp
index 31dffd9d7..7391f2484 100644
--- a/src/FDM/JSBSim/FGThruster.cpp
+++ b/src/FDM/JSBSim/FGThruster.cpp
@@ -37,6 +37,9 @@ INCLUDES
 
 #include "FGThruster.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_THRUSTER;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGThruster.h b/src/FDM/JSBSim/FGThruster.h
index 57525dd64..6ccf197ac 100644
--- a/src/FDM/JSBSim/FGThruster.h
+++ b/src/FDM/JSBSim/FGThruster.h
@@ -44,6 +44,8 @@ INCLUDES
 
 #include "FGForce.h"
 
+#define ID_THRUSTER "$Header"
+
 /*******************************************************************************
 CLASS DECLARATION
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGTranslation.cpp b/src/FDM/JSBSim/FGTranslation.cpp
index f17e13756..031d0961f 100644
--- a/src/FDM/JSBSim/FGTranslation.cpp
+++ b/src/FDM/JSBSim/FGTranslation.cpp
@@ -68,6 +68,9 @@ INCLUDES
 #include "FGAuxiliary.h"
 #include "FGOutput.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_TRANSLATION;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGTranslation.h b/src/FDM/JSBSim/FGTranslation.h
index db9f9732f..cb3696b46 100644
--- a/src/FDM/JSBSim/FGTranslation.h
+++ b/src/FDM/JSBSim/FGTranslation.h
@@ -70,6 +70,8 @@ INCLUDES
 #include "FGModel.h"
 #include "FGMatrix.h"
 
+#define ID_TRANSLATION "$Header"
+
 /*******************************************************************************
 CLASS DECLARATION
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGTrim.cpp b/src/FDM/JSBSim/FGTrim.cpp
index 78d4d8219..852cf38e2 100644
--- a/src/FDM/JSBSim/FGTrim.cpp
+++ b/src/FDM/JSBSim/FGTrim.cpp
@@ -52,6 +52,9 @@ INCLUDES
 #include "FGTrim.h"
 #include "FGAircraft.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_TRIM;
+
 /*******************************************************************************/
 
 FGTrim::FGTrim(FGFDMExec *FDMExec,FGInitialCondition *FGIC, TrimMode tt ) {
diff --git a/src/FDM/JSBSim/FGTrim.h b/src/FDM/JSBSim/FGTrim.h
index 79244aacc..c7088fa1c 100644
--- a/src/FDM/JSBSim/FGTrim.h
+++ b/src/FDM/JSBSim/FGTrim.h
@@ -65,6 +65,7 @@ INCLUDES
 
 #include <vector.h>
 
+#define ID_TRIM "$Header"
 
 /*******************************************************************************
 CLASS DECLARATION
diff --git a/src/FDM/JSBSim/FGTrimAxis.cpp b/src/FDM/JSBSim/FGTrimAxis.cpp
index b59602e0f..a4df73063 100644
--- a/src/FDM/JSBSim/FGTrimAxis.cpp
+++ b/src/FDM/JSBSim/FGTrimAxis.cpp
@@ -28,9 +28,7 @@
 --------------------------------------------------------------------------------
 7/3/00   TP   Created
  
- 
-*/
-/*******************************************************************************
+********************************************************************************
 INCLUDES
 *******************************************************************************/
 
@@ -43,6 +41,9 @@ INCLUDES
 #include "FGTrimAxis.h"
 #include "FGAircraft.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_TRIMAXIS;
+
 /*****************************************************************************/
 
 FGTrimAxis::FGTrimAxis(FGFDMExec* fdex, FGInitialCondition* ic, Accel acc,
diff --git a/src/FDM/JSBSim/FGTrimAxis.h b/src/FDM/JSBSim/FGTrimAxis.h
index 007b78515..0bad11ddc 100644
--- a/src/FDM/JSBSim/FGTrimAxis.h
+++ b/src/FDM/JSBSim/FGTrimAxis.h
@@ -54,6 +54,7 @@ INCLUDES
 #include "FGAuxiliary.h"
 #include "FGOutput.h"
 
+#define ID_TRIMAXIS "$Header"
 
 const string AccelNames[6]=   { "udot","vdot","wdot","qdot","pdot","rdot" };
 const string ControlNames[13]= { "Throttle","Sideslip","Angle of Attack",
diff --git a/src/FDM/JSBSim/FGTurboJet.cpp b/src/FDM/JSBSim/FGTurboJet.cpp
index 4cc0accb4..9e15172c1 100644
--- a/src/FDM/JSBSim/FGTurboJet.cpp
+++ b/src/FDM/JSBSim/FGTurboJet.cpp
@@ -40,6 +40,9 @@ INCLUDES
 
 #include "FGTurboJet.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_TURBOJET;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGTurboJet.h b/src/FDM/JSBSim/FGTurboJet.h
index b38637e7c..2d3ceae65 100644
--- a/src/FDM/JSBSim/FGTurboJet.h
+++ b/src/FDM/JSBSim/FGTurboJet.h
@@ -44,6 +44,8 @@ INCLUDES
 
 #include "FGEngine.h"
 
+#define ID_TURBOJET "$Header"
+
 /*******************************************************************************
 CLASS DECLARATION
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGTurboShaft.cpp b/src/FDM/JSBSim/FGTurboShaft.cpp
index 572656f38..222e19c99 100644
--- a/src/FDM/JSBSim/FGTurboShaft.cpp
+++ b/src/FDM/JSBSim/FGTurboShaft.cpp
@@ -40,6 +40,9 @@ INCLUDES
 
 #include "FGTurboShaft.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_TURBOSHAFT;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGTurboShaft.h b/src/FDM/JSBSim/FGTurboShaft.h
index e19f43cc7..5b1bfd1ae 100644
--- a/src/FDM/JSBSim/FGTurboShaft.h
+++ b/src/FDM/JSBSim/FGTurboShaft.h
@@ -44,6 +44,8 @@ INCLUDES
 
 #include "FGEngine.h"
 
+#define ID_TURBOSHAFT "$Header"
+
 /*******************************************************************************
 CLASS DECLARATION
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGUtility.cpp b/src/FDM/JSBSim/FGUtility.cpp
index 32f290c49..bed3e719a 100644
--- a/src/FDM/JSBSim/FGUtility.cpp
+++ b/src/FDM/JSBSim/FGUtility.cpp
@@ -57,6 +57,9 @@ INCLUDES
 #include "FGState.h"
 #include "FGFDMExec.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_UTILITY;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGUtility.h b/src/FDM/JSBSim/FGUtility.h
index 4fb247ad9..f4614f344 100644
--- a/src/FDM/JSBSim/FGUtility.h
+++ b/src/FDM/JSBSim/FGUtility.h
@@ -42,6 +42,8 @@ INCLUDES
 DEFINES
 *******************************************************************************/
 
+#define ID_UTILITY "$Header"
+
 /*******************************************************************************
 CLASS DECLARATION
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGfdmSocket.cpp b/src/FDM/JSBSim/FGfdmSocket.cpp
index 17d6e21a4..97d731af9 100644
--- a/src/FDM/JSBSim/FGfdmSocket.cpp
+++ b/src/FDM/JSBSim/FGfdmSocket.cpp
@@ -39,6 +39,9 @@ INCLUDES
 
 #include "FGfdmSocket.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_FDMSOCKET;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/FGfdmSocket.h b/src/FDM/JSBSim/FGfdmSocket.h
index 52f2ffe42..d34d19610 100644
--- a/src/FDM/JSBSim/FGfdmSocket.h
+++ b/src/FDM/JSBSim/FGfdmSocket.h
@@ -76,6 +76,8 @@ INCLUDES
 DEFINITIONS
 *******************************************************************************/
 
+#define ID_FDMSOCKET "$Header"
+
 using std::cout;
 using std::endl;
 
diff --git a/src/FDM/JSBSim/JSBSim.cpp b/src/FDM/JSBSim/JSBSim.cpp
index bbae63b13..43850a69c 100644
--- a/src/FDM/JSBSim/JSBSim.cpp
+++ b/src/FDM/JSBSim/JSBSim.cpp
@@ -115,6 +115,8 @@ USEUNIT("FGAerodynamics.cpp");
 #include <ctime>
 #endif
 
+static const char *IdSrc = "$Header$";
+
 int main(int argc, char** argv)
 {
   FGFDMExec* FDMExec;
diff --git a/src/FDM/JSBSim/filtersjb/FGDeadBand.cpp b/src/FDM/JSBSim/filtersjb/FGDeadBand.cpp
index 16be66794..7ab308521 100644
--- a/src/FDM/JSBSim/filtersjb/FGDeadBand.cpp
+++ b/src/FDM/JSBSim/filtersjb/FGDeadBand.cpp
@@ -1,9 +1,8 @@
-
 /*******************************************************************************
 
  Module:       FGDeadBand.cpp
- Author:       
- Date started: 
+ Author:       Jon S. Berndt
+ Date started: 11/1999
  
  ------------- Copyright (C) 2000 -------------
 
@@ -40,6 +39,9 @@ INCLUDES
 
 #include "FGDeadBand.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_DEADBAND;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/filtersjb/FGDeadBand.h b/src/FDM/JSBSim/filtersjb/FGDeadBand.h
index d3faf0317..e1a3224ec 100644
--- a/src/FDM/JSBSim/filtersjb/FGDeadBand.h
+++ b/src/FDM/JSBSim/filtersjb/FGDeadBand.h
@@ -49,6 +49,8 @@ INCLUDES
 DEFINES
 *******************************************************************************/
 
+#define ID_DEADBAND "$Header"
+
 class FGFCS;
 
 /*******************************************************************************
diff --git a/src/FDM/JSBSim/filtersjb/FGFCSComponent.cpp b/src/FDM/JSBSim/filtersjb/FGFCSComponent.cpp
index 48491ef66..321f57c0e 100644
--- a/src/FDM/JSBSim/filtersjb/FGFCSComponent.cpp
+++ b/src/FDM/JSBSim/filtersjb/FGFCSComponent.cpp
@@ -1,8 +1,8 @@
 /*******************************************************************************
 
  Module:       FGFCSComponent.cpp
- Author:       
- Date started: 
+ Author:       Jon S. Berndt
+ Date started: 11/1999
  
  ------------- Copyright (C) 2000 -------------
 
@@ -39,16 +39,13 @@ INCLUDES
 
 #include "FGFCSComponent.h"    				
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_FCSCOMPONENT;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
 
-// *****************************************************************************
-//  Function:   Constructor
-//  Purpose:
-//  Parameters: void
-//  Comments:
-
 FGFCSComponent::FGFCSComponent(FGFCS* _fcs) : fcs(_fcs)
 {
   Type       = "";
diff --git a/src/FDM/JSBSim/filtersjb/FGFCSComponent.h b/src/FDM/JSBSim/filtersjb/FGFCSComponent.h
index ce4d72136..ba79ed085 100644
--- a/src/FDM/JSBSim/filtersjb/FGFCSComponent.h
+++ b/src/FDM/JSBSim/filtersjb/FGFCSComponent.h
@@ -53,6 +53,8 @@ INCLUDES
 DEFINES
 *******************************************************************************/
 
+#define ID_FCSCOMPONENT "$Header"
+
 using std::string;
 
 class FGFCS;
diff --git a/src/FDM/JSBSim/filtersjb/FGFilter.cpp b/src/FDM/JSBSim/filtersjb/FGFilter.cpp
index 71170efe1..a6da5b275 100644
--- a/src/FDM/JSBSim/filtersjb/FGFilter.cpp
+++ b/src/FDM/JSBSim/filtersjb/FGFilter.cpp
@@ -1,8 +1,8 @@
 /*******************************************************************************
 
  Module:       FGFilter.cpp
- Author:       
- Date started: 
+ Author:       Jon S. Berndt
+ Date started: 11/2000
  
  ------------- Copyright (C) 2000 -------------
 
@@ -39,16 +39,13 @@ INCLUDES
 
 #include "FGFilter.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_FILTER;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
 
-// *****************************************************************************
-//  Function:   constructor
-//  Purpose:
-//  Parameters: void
-//  Comments:
-
 FGFilter::FGFilter(FGFCS* fcs, FGConfigFile* AC_cfg) : FGFCSComponent(fcs),
                                                        AC_cfg(AC_cfg)
 {
diff --git a/src/FDM/JSBSim/filtersjb/FGFilter.h b/src/FDM/JSBSim/filtersjb/FGFilter.h
index 38391469e..a0a684575 100644
--- a/src/FDM/JSBSim/filtersjb/FGFilter.h
+++ b/src/FDM/JSBSim/filtersjb/FGFilter.h
@@ -48,6 +48,8 @@ INCLUDES
 DEFINES
 *******************************************************************************/
 
+#define ID_FILTER "$Header"
+
 /*******************************************************************************
 CLASS DECLARATION
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/filtersjb/FGFlaps.cpp b/src/FDM/JSBSim/filtersjb/FGFlaps.cpp
index 436069833..3b22923f4 100644
--- a/src/FDM/JSBSim/filtersjb/FGFlaps.cpp
+++ b/src/FDM/JSBSim/filtersjb/FGFlaps.cpp
@@ -39,6 +39,9 @@ INCLUDES
 
 #include "FGFlaps.h"
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_FLAPS;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/filtersjb/FGFlaps.h b/src/FDM/JSBSim/filtersjb/FGFlaps.h
index 4a5fe019a..f7c6692df 100644
--- a/src/FDM/JSBSim/filtersjb/FGFlaps.h
+++ b/src/FDM/JSBSim/filtersjb/FGFlaps.h
@@ -61,6 +61,8 @@ INCLUDES
 DEFINES
 *******************************************************************************/
 
+#define ID_FLAPS "$Header"
+
 /*******************************************************************************
 CLASS DECLARATION
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/filtersjb/FGGain.cpp b/src/FDM/JSBSim/filtersjb/FGGain.cpp
index 40b4fe4aa..104b9540f 100644
--- a/src/FDM/JSBSim/filtersjb/FGGain.cpp
+++ b/src/FDM/JSBSim/filtersjb/FGGain.cpp
@@ -1,8 +1,8 @@
 /*******************************************************************************
 
  Module:       FGGain.cpp
- Author:       
- Date started: 
+ Author:       Jon S. Berndt
+ Date started: 4/2000
  
  ------------- Copyright (C) 2000 -------------
 
@@ -39,6 +39,9 @@ INCLUDES
 
 #include "FGGain.h"            
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_GAIN;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/filtersjb/FGGain.h b/src/FDM/JSBSim/filtersjb/FGGain.h
index 5ee268966..cab7ab5cd 100644
--- a/src/FDM/JSBSim/filtersjb/FGGain.h
+++ b/src/FDM/JSBSim/filtersjb/FGGain.h
@@ -61,6 +61,8 @@ INCLUDES
 DEFINES
 *******************************************************************************/
 
+#define ID_GAIN "$Header"
+
 class FGFCS;
 
 /*******************************************************************************
diff --git a/src/FDM/JSBSim/filtersjb/FGGradient.cpp b/src/FDM/JSBSim/filtersjb/FGGradient.cpp
index f58ffbc5c..5203bf6f9 100644
--- a/src/FDM/JSBSim/filtersjb/FGGradient.cpp
+++ b/src/FDM/JSBSim/filtersjb/FGGradient.cpp
@@ -1,4 +1,3 @@
-
 /*******************************************************************************
 
  Module:       FGGradient.cpp
@@ -40,16 +39,13 @@ INCLUDES
 
 #include "FGGradient.h"    				
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_GRADIENT;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
 
-// *****************************************************************************
-//  Function:   Run
-//  Purpose:
-//  Parameters: void
-//  Comments:
-
 FGGradient::FGGradient(FGFCS* fcs, FGConfigFile* AC_cfg) : FGFCSComponent(fcs),
                                                            AC_cfg(AC_cfg)
 {
diff --git a/src/FDM/JSBSim/filtersjb/FGGradient.h b/src/FDM/JSBSim/filtersjb/FGGradient.h
index 7433c36e3..9130c1c20 100644
--- a/src/FDM/JSBSim/filtersjb/FGGradient.h
+++ b/src/FDM/JSBSim/filtersjb/FGGradient.h
@@ -49,6 +49,8 @@ INCLUDES
 DEFINES
 *******************************************************************************/
 
+#define ID_GRADIENT "$Header"
+
 class FGFCS;
 
 /*******************************************************************************
diff --git a/src/FDM/JSBSim/filtersjb/FGSummer.cpp b/src/FDM/JSBSim/filtersjb/FGSummer.cpp
index 8f85e18dc..a013eee59 100644
--- a/src/FDM/JSBSim/filtersjb/FGSummer.cpp
+++ b/src/FDM/JSBSim/filtersjb/FGSummer.cpp
@@ -1,8 +1,8 @@
 /*******************************************************************************
 
  Module:       FGSummer.cpp
- Author:       
- Date started: 
+ Author:       Jon S. Berndt
+ Date started: 4/2000
  
  ------------- Copyright (C) 2000 -------------
 
@@ -39,16 +39,13 @@ INCLUDES
 
 #include "FGSummer.h"            
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_SUMMER;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
 
-// *****************************************************************************
-//  Function:   Constructor
-//  Purpose:
-//  Parameters: void
-//  Comments:
-
 FGSummer::FGSummer(FGFCS* fcs, FGConfigFile* AC_cfg) : FGFCSComponent(fcs),
                                                        AC_cfg(AC_cfg)
 {
diff --git a/src/FDM/JSBSim/filtersjb/FGSummer.h b/src/FDM/JSBSim/filtersjb/FGSummer.h
index 3e768bc68..749dc0c54 100644
--- a/src/FDM/JSBSim/filtersjb/FGSummer.h
+++ b/src/FDM/JSBSim/filtersjb/FGSummer.h
@@ -61,6 +61,8 @@ INCLUDES
 DEFINES
 *******************************************************************************/
 
+#define ID_SUMMER "$Header"
+
 /*******************************************************************************
 CLASS DECLARATION
 *******************************************************************************/
diff --git a/src/FDM/JSBSim/filtersjb/FGSwitch.cpp b/src/FDM/JSBSim/filtersjb/FGSwitch.cpp
index 8de5203d1..6687abbd9 100644
--- a/src/FDM/JSBSim/filtersjb/FGSwitch.cpp
+++ b/src/FDM/JSBSim/filtersjb/FGSwitch.cpp
@@ -2,8 +2,8 @@
 /*******************************************************************************
 
  Module:       FGSwitch.cpp
- Author:       
- Date started: 
+ Author:       Jon S. Berndt
+ Date started: 4/2000
  
  ------------- Copyright (C) 2000 -------------
 
@@ -40,16 +40,13 @@ INCLUDES
 
 #include "FGSwitch.h"    				
 
+static const char *IdSrc = "$Header$";
+static const char *IdHdr = ID_SWITCH;
+
 /*******************************************************************************
 ************************************ CODE **************************************
 *******************************************************************************/
 
-// *****************************************************************************
-//  Function:   constructor
-//  Purpose:
-//  Parameters: void
-//  Comments:
-
 FGSwitch::FGSwitch(FGFCS* fcs, FGConfigFile* AC_cfg) : FGFCSComponent(fcs),
                                                        AC_cfg(AC_cfg)
 {
diff --git a/src/FDM/JSBSim/filtersjb/FGSwitch.h b/src/FDM/JSBSim/filtersjb/FGSwitch.h
index 3e95a9e71..475cf7e66 100644
--- a/src/FDM/JSBSim/filtersjb/FGSwitch.h
+++ b/src/FDM/JSBSim/filtersjb/FGSwitch.h
@@ -49,6 +49,8 @@ INCLUDES
 DEFINES
 *******************************************************************************/
 
+#define ID_SWITCH "$Header"
+
 /*******************************************************************************
 CLASS DECLARATION
 *******************************************************************************/