diff --git a/lib_planes/control.lua b/lib_planes/control.lua
index 3c85e22..f8f797c 100755
--- a/lib_planes/control.lua
+++ b/lib_planes/control.lua
@@ -235,7 +235,7 @@ function airutils.autopilot(self, dtime, hull_direction, longit_speed, accel, cu
 
     local retval_accel = accel
 
-    local max_autopilot_power = 85
+    --[[local max_autopilot_power = 85
 
     --climb
     local velocity = self.object:get_velocity()
@@ -248,7 +248,7 @@ function airutils.autopilot(self, dtime, hull_direction, longit_speed, accel, cu
     self._acceleration = 0
     if self._engine_running then
         --engine acceleration calc
-        local engineacc = (self._power_lever * airutils.max_engine_acc) / 100;
+        local engineacc = (self._power_lever * self._max_engine_acc) / 100;
         --self.engine:set_animation_frame_speed(60 + self._power_lever)
 
         local factor = math.abs(climb_rate * 0.1) --getAdjustFactor(curr_pos.y, self._auto_pilot_altitude)
@@ -261,7 +261,7 @@ function airutils.autopilot(self, dtime, hull_direction, longit_speed, accel, cu
             airutils.powerAdjust(self, dtime, factor, 1, max_autopilot_power)
         end
         --do not exceed
-        local max_speed = airutils.max_speed
+        local max_speed = self._max_speed
         if longit_speed > max_speed then
             engineacc = engineacc - (longit_speed-max_speed)
             if engineacc < 0 then engineacc = 0 end
@@ -287,7 +287,7 @@ function airutils.autopilot(self, dtime, hull_direction, longit_speed, accel, cu
         if airutils.elevator_auto_correction then
             self._elevator_angle = airutils.elevator_auto_correction(self, longit_speed, self.dtime, airutils.max_speed, self._elevator_angle, airutils.elevator_limit, airutils.ideal_step, self._elevator_auto_estabilize)
         end
-    end
+    end]]--
 
     return retval_accel
 end
diff --git a/lib_planes/entities.lua b/lib_planes/entities.lua
index d8f4fe6..1bc6500 100644
--- a/lib_planes/entities.lua
+++ b/lib_planes/entities.lua
@@ -108,16 +108,28 @@ end
 
 local function ground_pitch(self, longit_speed, curr_pitch)
     newpitch = curr_pitch
+    if self._last_longit_speed == nil then self._last_longit_speed = 0 end
+
+    -- Estado atual do sistema
+    if self._current_value == nil then self._current_value = 0 end -- Valor atual do sistema
+    if self._last_error == nil then self._last_error = 0 end -- Último erro registrado
+
     -- adjust pitch at ground
     if math.abs(longit_speed) < self._tail_lift_max_speed then
-        --minetest.chat_send_all(math.abs(longit_speed))
         local speed_range = self._tail_lift_max_speed - self._tail_lift_min_speed
         local percentage = 1-((math.abs(longit_speed) - self._tail_lift_min_speed)/speed_range)
         if percentage > 1 then percentage = 1 end
         if percentage < 0 then percentage = 0 end
         local angle = self._tail_angle * percentage
-        local calculated_newpitch = math.rad(angle)
-        if newpitch < calculated_newpitch then newpitch = calculated_newpitch end --ja aproveita o pitch atual se ja estiver cerrto
+        local rad_angle = math.rad(angle)
+
+        if newpitch < rad_angle then newpitch = rad_angle end --ja aproveita o pitch atual se ja estiver cerrto
+        --[[self._current_value = curr_pitch
+        local kp = (longit_speed - self._tail_lift_min_speed)/10
+        local output, last_error = airutils.pid_controller(self._current_value, rad_angle, self._last_error, self.dtime, kp)
+        self._last_error = last_error
+        newpitch = output]]--
+
         if newpitch > math.rad(self._tail_angle) then newpitch = math.rad(self._tail_angle) end --não queremos arrastar o cauda no chão
     end
     
@@ -489,6 +501,7 @@ function airutils.logic(self)
 
     --saves last velocity for collision detection (abrupt stop)
     self._last_vel = self.object:get_velocity()
+    self._last_longit_speed = longit_speed
 end
 
 local function damage_vehicle(self, toolcaps, ttime, damage)
diff --git a/lib_planes/utilities.lua b/lib_planes/utilities.lua
index a9034fd..a314564 100644
--- a/lib_planes/utilities.lua
+++ b/lib_planes/utilities.lua
@@ -551,6 +551,25 @@ function airutils.paint_with_mask(self, colstr, target_texture, mask_texture)
     end
 end
 
+function airutils.pid_controller(current_value, setpoint, last_error, d_time, kp, ki, kd)
+    kp = kp or 0
+    ki = ki or 0.00000000000001
+    kd = kd or 0.005
+
+    local ti = kp/ki
+    local td = kd/kp
+    local delta_t = d_time
+
+    local _error = setpoint - current_value
+    local derivative = _error - last_error
+    --local output = kpv*erro + (kpv/Tiv)*I + kpv*Tdv*((erro - erro_passado)/delta_t);
+    if integrative == nil then integrative = 0 end
+    integrative = integrative + (((_error + last_error)/delta_t)/2);
+    local output = kp*_error + (kp/ti)*integrative + kp * td*((_error - last_error)/delta_t)
+    last_error = _error
+    return output, last_error
+end
+
 function airutils.add_destruction_effects(pos, radius)
 	local node = airutils.nodeatpos(pos)
     local is_liquid = false