Gene Buckle:

Patches to allow control of more than 1 (up to 10) ejection seats, and
control them with more flexibility.  A particular ejectection seat can be
disarmed or failed, in which case it can't be ejected until it is armed
or fixed.

src/Controls/controls.cxx

@@ -102,7 +102,6 @@ FGControls::FGControls() :
     release_ALL( false ),
     vertical_adjust( 0.0 ),
     fore_aft_adjust( 0.0 ),
-    eject( false ),
     off_start_run( 0 ),
     APU_fire_switch( false ),
     autothrottle_arm( false ),
@@ -166,7 +165,9 @@ void FGControls::reset_all()
     landing_lights = false;
     turn_off_lights = false;
     master_arm = false;
-    eject = false;
+    set_ejection_seat( ALL_EJECTION_SEATS, false );
+    set_eseat_status( ALL_EJECTION_SEATS, SEAT_SAFED );
+    set_cmd_selector_valve( CMD_SEL_NORM );
     APU_fire_switch = false;
     autothrottle_arm = false;
     autothrottle_engage = false;
@@ -681,9 +682,30 @@ FGControls::bind ()
         &FGControls::set_fore_aft_adjust);
   fgSetArchivable("/controls/seat/fore-aft-adjust");
   
-  fgTie("/controls/seat/eject", this,
+  for (index = 0; index < MAX_EJECTION_SEATS; index++) {
-	&FGControls::get_eject, &FGControls::set_eject);
+      char name[MAX_NAME_LEN];
-  fgSetArchivable("/controls/seat/eject");
+      snprintf(name, MAX_NAME_LEN,
+	       "/controls/seat/eject[%d]/initiate", index);
+      fgTie(name, this, index,
+	   &FGControls::get_ejection_seat, 
+	   &FGControls::set_ejection_seat);
+      fgSetArchivable(name);
+
+      snprintf(name, MAX_NAME_LEN,
+	       "/controls/seat/eject[%d]/status", index);
+
+      fgTie(name, this, index,
+           &FGControls::get_eseat_status,
+	   &FGControls::set_eseat_status);
+
+      fgSetArchivable(name);
+  }
+  
+  fgTie("/controls/seat/cmd_selector_valve", this,
+        &FGControls::get_cmd_selector_valve,
+	&FGControls::set_cmd_selector_valve);
+  fgSetArchivable("/controls/seat/eject/cmd_selector_valve");
+
 
   // APU
   fgTie("/controls/APU/off-start-run", this,
@@ -942,7 +964,17 @@ void FGControls::unbind ()
 #endif
   fgUntie("/controls/seat/vertical-adjust");  
   fgUntie("/controls/seat/fore-aft-adjust");  
-  fgUntie("/controls/seat/eject");  
+  for (index = 0; index < MAX_EJECTION_SEATS; index++) {
+    char name[MAX_NAME_LEN];
+    snprintf(name, MAX_NAME_LEN,
+       "/controls/seat/eject[%d]/initiate", index);
+    fgUntie(name);
+    snprintf(name, MAX_NAME_LEN,
+       "/controls/seat/eject[%d]/status", index);
+    fgUntie(name);
+  }
+  fgUntie("/controls/seat/cmd_selector_valve");
+  
   fgUntie("/controls/APU/off-start-run");  
   fgUntie("/controls/APU/fire-switch");  
   for (index = 0; index < MAX_AUTOPILOTS; index++) {
@@ -2033,11 +2065,47 @@ FGControls::move_fore_aft_adjust( double amt )
 }
 
 void
-FGControls::set_eject( bool val )
+FGControls::set_ejection_seat( int which_seat, bool val )
 {
-  eject = val;
+    if ( which_seat == ALL_EJECTION_SEATS ) {
+        for ( int i = 0; i < MAX_EJECTION_SEATS; i++ ) {
+            eject[i] = val;
+        }
+    } else {
+        if ( (which_seat >= 0) && (which_seat <= MAX_EJECTION_SEATS) ) {
+            if ( eseat_status[which_seat] == SEAT_SAFED ||
+                 eseat_status[which_seat] == SEAT_FAIL )
+            {
+                // we can never eject if SEAT_SAFED or SEAT_FAIL
+                val = false;
+            }
+
+            eject[which_seat] = val;
+        }
+    }
 }
 
+void
+FGControls::set_eseat_status( int which_seat, int val )
+{
+    if ( which_seat == ALL_EJECTION_SEATS ) {
+        for ( int i = 0; i < MAX_EJECTION_SEATS; i++ ) {
+            eseat_status[i] = val;
+        }
+    } else {
+        if ( (which_seat >=0) && (which_seat <= MAX_EJECTION_SEATS) ) {
+            eseat_status[which_seat] = val;
+        }
+    }
+}
+
+void
+FGControls::set_cmd_selector_valve( int val )
+{
+  cmd_selector_valve = val;
+}
+
+
 void
 FGControls::set_off_start_run( int pos )
 {

src/Controls/controls.hxx

@@ -86,6 +86,23 @@ public:
 	MAX_AUTOPILOTS = 3
     };
 
+    enum {
+	ALL_EJECTION_SEATS = -1,
+	MAX_EJECTION_SEATS = 10
+    };
+   
+    enum {
+	SEAT_SAFED = -1,
+	SEAT_ARMED = 0,
+	SEAT_FAIL = 1
+    };
+   
+    enum { 
+	CMD_SEL_NORM = -1,
+	CMD_SEL_AFT = 0,
+	CMD_SEL_SOLO = 1
+    };
+    
 private:
     // controls/flight/
     double aileron;
@@ -211,7 +228,9 @@ private:
     // controls/seat/
     double vertical_adjust;
     double fore_aft_adjust;
-    bool eject;
+    bool eject[MAX_EJECTION_SEATS];
+    int eseat_status[MAX_EJECTION_SEATS];
+    int cmd_selector_valve;
 
     // controls/APU/
     int off_start_run;
@@ -394,7 +413,14 @@ public:
     // controls/seat/
     inline double get_vertical_adjust() const { return vertical_adjust; }
     inline double get_fore_aft_adjust() const { return fore_aft_adjust; }
-    inline bool get_eject() const { return eject; }
+    inline bool get_ejection_seat( int which_seat ) const {
+        return eject[which_seat];
+    }
+    inline int get_eseat_status( int which_seat ) const {
+        return eseat_status[which_seat];
+    }
+    inline int get_cmd_selector_valve() const { return cmd_selector_valve; }
+    
 
     // controls/APU/
     inline int get_off_start_run() const { return off_start_run; }
@@ -571,7 +597,9 @@ public:
     void move_vertical_adjust( double amt );
     void set_fore_aft_adjust( double pos );
     void move_fore_aft_adjust( double amt );
-    void set_eject( bool val );
+    void set_ejection_seat( int which_seat, bool val );
+    void set_eseat_status( int which_seat, int val );
+    void set_cmd_selector_valve( int val );
 
     // controls/APU/
     void set_off_start_run( int pos );