SITL: simple implementation of a fast jet

just increase the weight and the rest can be done with params

libraries/SITL/SIM_Plane.cpp

@@ -40,6 +40,11 @@ Plane::Plane(const char *home_str, const char *frame_str) :
     if (strstr(frame_str, "-heavy")) {
         mass = 8;
     }
+    if (strstr(frame_str, "-jet")) {
+        // a 22kg "jet", level top speed is 102m/s
+        mass = 22;
+        thrust_scale = (mass * GRAVITY_MSS) / hover_throttle;
+    }
     if (strstr(frame_str, "-revthrust")) {
         reverse_thrust = true;
     }
@@ -68,11 +73,11 @@ Plane::Plane(const char *home_str, const char *frame_str) :
         launch_accel = 10;
         launch_time = 1;
     }
-   if (strstr(frame_str, "-tailsitter")) {
-       tailsitter = true;
-       ground_behavior = GROUND_BEHAVIOR_TAILSITTER;
-       thrust_scale *= 1.5;
-   }
+    if (strstr(frame_str, "-tailsitter")) {
+        tailsitter = true;
+        ground_behavior = GROUND_BEHAVIOR_TAILSITTER;
+        thrust_scale *= 1.5;
+    }
 
     if (strstr(frame_str, "-ice")) {
         ice_engine = true;