ArduPlane: Add a stall speed parameter

Author: WickedShell

ArduPlane/Parameters.cpp

@@ -296,6 +296,14 @@ const AP_Param::Info Plane::var_info[] = {
     // @User: Standard
     ASCALAR(airspeed_max, "AIRSPEED_MAX",  AIRSPEED_FBW_MAX),
 
+    // @Param: AIRSPEED_STALL
+    // @DisplayName: Stall airspeed
+    // @Description: If stall prevention is enabled this speed is used to calculate the minimum airspeed while banking. If this is set to 0 then the stall speed is assumed to be the minimum airspeed speed. Typically set slightly higher then true stall speed. Value is as an indicated (calibrated/apparent) airspeed.
+    // @Units: m/s
+    // @Range: 5 75
+    // @User: Standard
+    ASCALAR(airspeed_stall, "AIRSPEED_STALL", 0),
+
     // @Param: FBWB_ELEV_REV
     // @DisplayName: Fly By Wire elevator reverse
     // @Description: Reverse sense of elevator in FBWB and CRUISE modes. When set to 0 up elevator (pulling back on the stick) means to lower altitude. When set to 1, up elevator means to raise altitude.

ArduPlane/Parameters.h

@@ -343,6 +343,7 @@ class Parameters {
 
         k_param_mixing_offset,
         k_param_dspoiler_rud_rate,
+        k_param_airspeed_stall,
 
         k_param_logger = 253, // Logging Group