diff --git a/ArduCopter/Parameters.h b/ArduCopter/Parameters.h
index 2ec0f2fbdf..613b704daa 100644
--- a/ArduCopter/Parameters.h
+++ b/ArduCopter/Parameters.h
@@ -246,7 +246,7 @@ public:
         k_param_rc_10,
         k_param_rc_11,
         k_param_throttle_min,
-        k_param_throttle_max,
+        k_param_throttle_max,           // remove
         k_param_failsafe_throttle,
         k_param_throttle_fs_action,     // remove
         k_param_failsafe_throttle_value,
@@ -367,7 +367,6 @@ public:
     // Throttle
     //
     AP_Int16        throttle_min;
-    AP_Int16        throttle_max;
     AP_Int8         failsafe_throttle;
     AP_Int16        failsafe_throttle_value;
     AP_Int16        throttle_mid;
diff --git a/ArduCopter/Parameters.pde b/ArduCopter/Parameters.pde
index 5cbfca03f4..487fa50dd1 100644
--- a/ArduCopter/Parameters.pde
+++ b/ArduCopter/Parameters.pde
@@ -219,15 +219,6 @@ const AP_Param::Info var_info[] PROGMEM = {
     // @User: Standard
     GSCALAR(throttle_min,   "THR_MIN",          THR_MIN_DEFAULT),
 
-    // @Param: THR_MAX
-    // @DisplayName: Throttle Maximum
-    // @Description: The maximum throttle that will be sent to the motors.  This should normally be left as 1000.
-    // @Units: Percent*10
-    // @Range: 800 1000
-    // @Increment: 1
-    // @User: Advanced
-    GSCALAR(throttle_max,   "THR_MAX",          THR_MAX_DEFAULT),
-
     // @Param: FS_THR_ENABLE
     // @DisplayName: Throttle Failsafe Enable
     // @Description: The throttle failsafe allows you to configure a software failsafe activated by a setting on the throttle input channel
diff --git a/ArduCopter/config.h b/ArduCopter/config.h
index d43a24bc27..1f99e20062 100644
--- a/ArduCopter/config.h
+++ b/ArduCopter/config.h
@@ -626,9 +626,7 @@
 #ifndef THR_MIN_DEFAULT
  # define THR_MIN_DEFAULT       130             // minimum throttle sent to the motors when armed and pilot throttle above zero
 #endif
-#ifndef THR_MAX_DEFAULT
- # define THR_MAX_DEFAULT       1000            // maximum throttle sent to the motors
-#endif
+#define THR_MAX                 1000            // maximum throttle input and output sent to the motors
 
 #ifndef THR_DZ_DEFAULT
 # define THR_DZ_DEFAULT         100             // the deadzone above and below mid throttle while in althold or loiter
diff --git a/ArduCopter/control_drift.pde b/ArduCopter/control_drift.pde
index a32dfe7c1a..6c3847b573 100644
--- a/ArduCopter/control_drift.pde
+++ b/ArduCopter/control_drift.pde
@@ -107,7 +107,7 @@ int16_t get_throttle_assist(float velz, int16_t pilot_throttle_scaled)
     //      Only active when pilot's throttle is between 213 ~ 787
     //      Assistance is strongest when throttle is at mid, drops linearly to no assistance at 213 and 787
     float thr_assist = 0.0f;
-    if (pilot_throttle_scaled > g.throttle_min && pilot_throttle_scaled < g.throttle_max &&
+    if (pilot_throttle_scaled > g.throttle_min && pilot_throttle_scaled < THR_MAX &&
         pilot_throttle_scaled > DRIFT_THR_MIN && pilot_throttle_scaled < DRIFT_THR_MAX) {
         // calculate throttle assist gain
         thr_assist = 1.2 - ((float)abs(pilot_throttle_scaled - 500) / 240.0f);
@@ -117,7 +117,7 @@ int16_t get_throttle_assist(float velz, int16_t pilot_throttle_scaled)
         thr_assist = constrain_float(thr_assist, -DRIFT_THR_ASSIST_MAX, DRIFT_THR_ASSIST_MAX);
 
         // ensure throttle assist never pushes throttle below throttle_min or above throttle_max
-        thr_assist = constrain_float(thr_assist, g.throttle_min - pilot_throttle_scaled, g.throttle_max - pilot_throttle_scaled);
+        thr_assist = constrain_float(thr_assist, g.throttle_min - pilot_throttle_scaled, THR_MAX - pilot_throttle_scaled);
     }
     
     return pilot_throttle_scaled + thr_assist;
diff --git a/ArduCopter/radio.pde b/ArduCopter/radio.pde
index b1862923fc..b6a5ad7e74 100644
--- a/ArduCopter/radio.pde
+++ b/ArduCopter/radio.pde
@@ -23,7 +23,7 @@ static void init_rc_in()
     // set rc channel ranges
     g.rc_1.set_angle(ROLL_PITCH_INPUT_MAX);
     g.rc_2.set_angle(ROLL_PITCH_INPUT_MAX);
-    g.rc_3.set_range(g.throttle_min, g.throttle_max);
+    g.rc_3.set_range(g.throttle_min, THR_MAX);
     g.rc_4.set_angle(4500);
 
     g.rc_1.set_type(RC_CHANNEL_TYPE_ANGLE_RAW);
@@ -185,4 +185,4 @@ static void set_throttle_zero_flag(int16_t throttle_control)
     } else if (tnow_ms - last_nonzero_throttle_ms > THROTTLE_ZERO_DEBOUNCE_TIME_MS) {
         ap.throttle_zero = true;
     }
-}
\ No newline at end of file
+}