diff --git a/.luacheckrc b/.luacheckrc
new file mode 100644
index 0000000..f4d08e0
--- /dev/null
+++ b/.luacheckrc
@@ -0,0 +1,25 @@
+unused_args = false
+allow_defined_top = true
+
+globals = {
+    "minetest",
+    "mobkit",
+    "core",
+    "player_api",
+    "player_monoids",
+    "math.sign",
+}
+
+read_globals = {
+    string = {fields = {"split"}},
+    table = {fields = {"copy", "getn"}},
+
+    -- Builtin
+    "vector", "ItemStack",
+    "dump", "DIR_DELIM", "VoxelArea", "Settings",
+
+    -- MTG
+    "default", "sfinv", "creative",
+}
+
+ignore = {"611"}
diff --git a/init.lua b/init.lua
index 1e08813..3f85877 100644
--- a/init.lua
+++ b/init.lua
@@ -1,5 +1,6 @@
 trike={}
-trike.fuel = {['biofuel:biofuel'] = 1,['biofuel:bottle_fuel'] = 1,['biofuel:phial_fuel'] = 0.25, ['biofuel:fuel_can'] = 10}
+trike.fuel = {['biofuel:biofuel'] = 1,['biofuel:bottle_fuel'] = 1,
+            ['biofuel:phial_fuel'] = 0.25, ['biofuel:fuel_can'] = 10}
 trike.gravity = tonumber(minetest.settings:get("movement_gravity")) or 9.8
 
 trike.colors ={
@@ -32,8 +33,6 @@ dofile(minetest.get_modpath("trike") .. DIR_DELIM .. "trike_entities.lua")
 -- helpers and co.
 --
 
-local creative_exists = minetest.global_exists("creative")
-
 --
 -- items
 --
@@ -68,7 +67,7 @@ minetest.register_chatcommand("trike_eject", {
             if parent ~= nil then
                 local entity = parent:get_luaentity()
                 if entity.driver_name == name and entity.name == "trike:trike" then
-                    motorboat.dettach(entity, player)
+                    trike.dettach(entity, player)
                 else
 			        minetest.chat_send_player(name,colorstring)
                 end
@@ -76,5 +75,5 @@ minetest.register_chatcommand("trike_eject", {
 		else
 			minetest.chat_send_player(name,colorstring)
 		end
-	end	
+	end
 })
diff --git a/trike_control.lua b/trike_control.lua
index 61ac545..5001f67 100644
--- a/trike_control.lua
+++ b/trike_control.lua
@@ -2,6 +2,7 @@
 trike.trike_last_time_command = 0
 trike.vector_up = vector.new(0, 1, 0)
 trike.max_engine_acc = 4.5
+trike.ideal_step = 0.02
 
 dofile(minetest.get_modpath("trike") .. DIR_DELIM .. "trike_utilities.lua")
 
@@ -16,13 +17,14 @@ function trike.check_node_below(obj)
 	return touching_ground, liquid_below
 end
 
-function trike.control(self, dtime, hull_direction, longit_speed, longit_drag, later_speed, later_drag, accel, player, is_flying)
+function trike.control(self, dtime, hull_direction, longit_speed,
+            longit_drag, later_speed, later_drag, accel, player, is_flying)
     trike.trike_last_time_command = trike.trike_last_time_command + self.dtime
     if trike.trike_last_time_command > 1 then trike.trike_last_time_command = 1 end
     if self.driver_name == nil then return end
     local retval_accel = accel
 
-    local rudder_limit = 30    
+    local rudder_limit = 30
     local stop = false
 
 	-- player control
@@ -44,22 +46,26 @@ function trike.control(self, dtime, hull_direction, longit_speed, longit_drag, l
 			    self._engine_running = true
 	            -- sound and animation
                 self.sound_handle = minetest.sound_play({name = "engine"},
-	                {object = self.object, gain = 2.0, pitch = 0.5 + ((self._power_lever/100)/2),max_hear_distance = 32, loop = true,})
+	                {object = self.object, gain = 2.0,
+                        pitch = 0.5 + ((self._power_lever/100)/2),max_hear_distance = 32,
+                        loop = true,})
                 self.engine:set_animation_frame_speed(60)
 		    end
-        end		
+        end
 
         self._acceleration = 0
         if self._engine_running then
-            local engineacc = 0
             --engine acceleration calc
-            engineacc = (self._power_lever * trike.max_engine_acc) / 100;
+            local engineacc = (self._power_lever * trike.max_engine_acc) / 100;
             self.engine:set_animation_frame_speed(60 + self._power_lever)
 
+            local add_factor = 1
+            add_factor = add_factor * (dtime/trike.ideal_step) --adjusting the command speed by dtime
+
             --increase power lever
             if ctrl.jump then
                 if self._power_lever < 100 then
-                    self._power_lever = self._power_lever + 1
+                    self._power_lever = self._power_lever + add_factor
                 end
                 if self._power_lever > 100 then
                     self._power_lever = 100
@@ -68,13 +74,15 @@ function trike.control(self, dtime, hull_direction, longit_speed, longit_drag, l
                     --sound
                     minetest.sound_stop(self.sound_handle)
                     self.sound_handle = minetest.sound_play({name = "engine"},
-	                    {object = self.object, gain = 2.0, pitch = 0.5 + ((self._power_lever/100)/2),max_hear_distance = 32, loop = true,})
+	                    {object = self.object, gain = 2.0,
+                            pitch = 0.5 + ((self._power_lever/100)/2),max_hear_distance = 32,
+                            loop = true,})
                 end
             end
             --decrease power lever
             if ctrl.sneak then
                 if self._power_lever > 0 then
-                    self._power_lever = self._power_lever - 1
+                    self._power_lever = self._power_lever - add_factor
                     if self._power_lever < 0 then self._power_lever = 0 end
                 end
                 if self._power_lever <= 0 and is_flying == false then
@@ -92,7 +100,9 @@ function trike.control(self, dtime, hull_direction, longit_speed, longit_drag, l
                     --sound
                     minetest.sound_stop(self.sound_handle)
                     self.sound_handle = minetest.sound_play({name = "engine"},
-		                {object = self.object, gain = 2.0, pitch = 0.5 + ((self._power_lever/100)/2),max_hear_distance = 32, loop = true,})
+		                {object = self.object, gain = 2.0,
+                            pitch = 0.5 + ((self._power_lever/100)/2),
+                            max_hear_distance = 32, loop = true,})
                 end
             end
             --do not exceed
diff --git a/trike_custom_physics.lua b/trike_custom_physics.lua
index 99925bb..ef293ee 100644
--- a/trike_custom_physics.lua
+++ b/trike_custom_physics.lua
@@ -1,6 +1,4 @@
-local min = math.min
 local abs = math.abs
-local deg = math.deg
 
 function trike.physics(self)
     local friction = 0.99
@@ -17,9 +15,9 @@ function trike.physics(self)
 		local vnew = vector.new(vel)
 		
 		if not self.collided then						-- ugly workaround for inconsistent collisions
-			for _,k in ipairs({'y','z','x'}) do			
-				if vel[k]==0 and abs(self.lastvelocity[k])> 0.1 then 
-					vnew[k]=-self.lastvelocity[k]*self.springiness 
+			for _,k in ipairs({'y','z','x'}) do
+				if vel[k]==0 and abs(self.lastvelocity[k])> 0.1 then
+					vnew[k]=-self.lastvelocity[k]*self.springiness
 				end
 			end
 		end
diff --git a/trike_entities.lua b/trike_entities.lua
index 5d89911..d148740 100644
--- a/trike_entities.lua
+++ b/trike_entities.lua
@@ -137,7 +137,7 @@ minetest.register_entity("trike:trike", {
         stepheight = 0.5,
         textures = {"trike_black.png", "trike_metal.png", "trike_metal.png", "trike_metal.png",
                     "trike_metal.png", "trike_metal.png", "trike_painting.png", "trike_black.png",
-                    "trike_white.png", "trike_black.png", "trike_black.png", "trike_black.png", 
+                    "trike_white.png", "trike_black.png", "trike_black.png", "trike_black.png",
                     "trike_grey.png", "trike_panel.png", "trike_black.png", "trike_metal.png", "trike_black.png"},
     },
     textures = {},
@@ -152,7 +152,6 @@ minetest.register_entity("trike:trike", {
     _passenger = nil,
     _color = "#0063b0",
     _rudder_angle = 0,
-    _angle_of_attack = 0,
     _acceleration = 0,
     _engine_running = false,
     _angle_of_attack = 2,
@@ -252,8 +251,6 @@ minetest.register_entity("trike:trike", {
 			-- do not allow other players to remove the object while there is a driver
 			return
 		end
-
-        local touching_ground, liquid_below = trike.check_node_below(self.object)
         
         local is_attached = false
         if puncher:get_attach() == self.object then is_attached = true end
@@ -274,7 +271,7 @@ minetest.register_entity("trike:trike", {
                     local inv = puncher:get_inventory()
                     if inv:contains_item("main", inventory_item) then
                         local stack = ItemStack(inventory_item .. " 1")
-                        local taken = inv:remove_item("main", stack)
+                        inv:remove_item("main", stack)
                         self.hp_max = self.hp_max + 10
                         if self.hp_max > 50 then self.hp_max = 50 end
                         trike.setText(self)
@@ -301,7 +298,8 @@ minetest.register_entity("trike:trike", {
                     -- end painting
 
 			    else -- deal damage
-				    if not self.driver and toolcaps and toolcaps.damage_groups and toolcaps.damage_groups.fleshy and item_name ~= trike.fuel then
+				    if not self.driver and toolcaps and toolcaps.damage_groups and
+                            toolcaps.damage_groups.fleshy and item_name ~= trike.fuel then
 					    --mobkit.hurt(self,toolcaps.damage_groups.fleshy - 1)
 					    --mobkit.make_sound(self,'hit')
                         self.hp_max = self.hp_max - 10
@@ -346,7 +344,7 @@ minetest.register_entity("trike:trike", {
 	            if name == self.driver_name then
                     -- eject passenger if the plane is on ground
                     local touching_ground, liquid_below = trike.check_node_below(self.object)
-                    if self.isinliquid or touching_ground then --isn't flying?
+                    if self.isinliquid or touching_ground or liquid_below then --isn't flying?
                         if self._passenger then
                             local passenger = minetest.get_player_by_name(self._passenger)
                             if passenger then trike.dettach_pax(self, passenger) end
diff --git a/trike_fuel_management.lua b/trike_fuel_management.lua
index 69d5a8d..4b10183 100644
--- a/trike_fuel_management.lua
+++ b/trike_fuel_management.lua
@@ -15,13 +15,12 @@ function trike.loadFuel(self, player_name)
     local item_name = ""
     if itmstck then item_name = itmstck:get_name() end
 
-    local stack = nil
     local fuel = trike.contains(trike.fuel, item_name)
     if fuel then
-        stack = ItemStack(item_name .. " 1")
+        local stack = ItemStack(item_name .. " 1")
 
         if self._energy < 10 then
-            local taken = inv:remove_item("main", stack)
+            inv:remove_item("main", stack)
             self._energy = self._energy + fuel
             if self._energy > 10 then self._energy = 10 end
 
@@ -38,8 +37,6 @@ end
 function trike.consumptionCalc(self, accel)
     if accel == nil then return end
     if self._energy > 0 and self._engine_running and accel ~= nil then
-        local zero_reference = vector.new()
-        local acceleration = trike.get_hipotenuse_value(accel, zero_reference)
         local consumed_power = self._power_lever/700000
         --minetest.chat_send_all('consumed: '.. consumed_power)
         self._energy = self._energy - consumed_power;
@@ -47,10 +44,6 @@ function trike.consumptionCalc(self, accel)
         local energy_indicator_angle = trike.get_gauge_angle(self._energy)
         if self.fuel_gauge:get_luaentity() then
             self.fuel_gauge:set_attach(self.object,'',TRIKE_GAUGE_FUEL_POSITION,{x=0,y=0,z=energy_indicator_angle})
-        else
-            --in case it have lost the entity by some conflict
-            --self.fuel_gauge=minetest.add_entity(TRIKE_GAUGE_POINTER_POSITION,'trike:pointer')
-            --self.fuel_gauge:set_attach(self.object,'',TRIKE_GAUGE_FUEL_POSITION,{x=0,y=0,z=energy_indicator_angle})
         end
     end
     if self._energy <= 0 and self._engine_running and accel ~= nil then
diff --git a/trike_global_definitions.lua b/trike_global_definitions.lua
index 5710ac8..3f2d442 100644
--- a/trike_global_definitions.lua
+++ b/trike_global_definitions.lua
@@ -6,7 +6,6 @@ LATER_DRAG_FACTOR = 2.0
 
 deg = math.deg
 abs = math.abs
-min = math.min
 
 TRIKE_GAUGE_FUEL_POSITION = {x=1.5,y=6.2,z=15.2}
 TRIKE_GAUGE_POWER_POSITION = {x=1.5,y=7.7,z=15.2}
diff --git a/trike_utilities.lua b/trike_utilities.lua
index d9afab2..ab2a359 100644
--- a/trike_utilities.lua
+++ b/trike_utilities.lua
@@ -16,34 +16,9 @@ function trike.minmax(v,m)
 	return math.min(math.abs(v),m)*trike.sign(v)
 end
 
-local physics_attrs = {"jump", "speed", "gravity"}
-local function apply_physics_override(player, overrides)
-    if player_monoids then
-        for _, attr in pairs(physics_attrs) do
-            if overrides[attr] then
-                player_monoids[attr]:add_change(player, overrides[attr], "hangglider:glider")
-            end
-        end
-    else
-        player:set_physics_override(overrides)
-    end
-end
-
-local function remove_physics_override(player, overrides)
-    for _, attr in pairs(physics_attrs) do
-        if overrides[attr] then
-            if core.global_exists("player_monoids") then
-                player_monoids[attr]:del_change(player, "hangglider:glider")
-            else
-                player:set_physics_override({[attr] = 1})
-            end
-        end
-    end
-end
-
 --lift
 local function pitchroll2pitchyaw(aoa,roll)
-	if roll == 0.0 then return aoa,0 end 
+	if roll == 0.0 then return aoa,0 end
 	-- assumed vector x=0,y=0,z=1
 	local p1 = math.tan(aoa)
 	local y = math.cos(roll)*p1
@@ -65,18 +40,18 @@ function trike.getLiftAccel(self, velocity, accel, longit_speed, roll, curr_pos)
         --local acc = 0.8
         local daoa = deg(angle_of_attack)
 
-    	--local curr_pos = self.object:get_pos()
-        local curr_percent_height = (100 - ((curr_pos.y * 100) / max_height))/100 --to decrease the lift coefficient at hight altitudes
+        --to decrease the lift coefficient at hight altitudes
+        local curr_percent_height = (100 - ((curr_pos.y * 100) / max_height))/100
 
 	    local rotation=self.object:get_rotation()
 	    local vrot = mobkit.dir_to_rot(velocity,rotation)
 	    
-	    hpitch,hyaw = pitchroll2pitchyaw(angle_of_attack,roll)
+	    local hpitch,hyaw = pitchroll2pitchyaw(angle_of_attack,roll)
 
 	    local hrot = {x=vrot.x+hpitch,y=vrot.y-hyaw,z=roll}
 	    local hdir = mobkit.rot_to_dir(hrot) --(hrot)
 	    local cross = vector.cross(velocity,hdir)
-	    local lift_dir = vector.normalize(vector.cross(cross,hdir))	
+	    local lift_dir = vector.normalize(vector.cross(cross,hdir))
 
         local lift_coefficient = (0.24*abs(daoa)*(1/(0.025*daoa+3))^4*math.sign(angle_of_attack))
         local lift_val = (lift*(vector.length(velocity)^2)*lift_coefficient)*curr_percent_height
@@ -111,7 +86,7 @@ function trike.attach(self, player)
     player_api.player_attached[name] = true
     -- make the driver sit
     minetest.after(0.2, function()
-        local player = minetest.get_player_by_name(name)
+        player = minetest.get_player_by_name(name)
         if player then
 	        player_api.set_animation(player, "sit")
             --apply_physics_override(player, {speed=0,gravity=0,jump=0})
@@ -130,7 +105,7 @@ function trike.attach_pax(self, player)
     player_api.player_attached[name] = true
     -- make the driver sit
     minetest.after(0.2, function()
-        local player = minetest.get_player_by_name(name)
+        player = minetest.get_player_by_name(name)
         if player then
 	        player_api.set_animation(player, "sit")
             --apply_physics_override(player, {speed=0,gravity=0,jump=0})
@@ -196,7 +171,7 @@ function trike.paint(self, object, colstr, search_string)
         local entity = object:get_luaentity()
         local l_textures = entity.initial_properties.textures
         for _, texture in ipairs(l_textures) do
-            local i,indx = texture:find(search_string)
+            local indx = texture:find(search_string)
             if indx then
                 l_textures[_] = search_string .."^[multiply:".. colstr
             end
@@ -215,7 +190,7 @@ function trike.destroy(self)
     if self._passenger then
         -- detach the passenger
         local passenger = minetest.get_player_by_name(self._passenger)
-        if passenger then 
+        if passenger then
             trike.dettach_pax(self, passenger)
         end
     end
@@ -284,7 +259,7 @@ function trike.setText(self)
 end
 
 function trike.testImpact(self, velocity)
-    collision = false
+    local collision = false
     if self._last_vel == nil then return end
     local impact = abs(trike.get_hipotenuse_value(velocity, self._last_vel))
     if impact > 2 then
@@ -298,9 +273,9 @@ function trike.testImpact(self, velocity)
         local nodeb = mobkit.nodeatpos(mobkit.pos_shift(p,{z=-1}))
 		if (nodeu and nodeu.drawtype ~= 'airlike') or
             (noded and noded.drawtype ~= 'airlike') or
-            (nodef and nodef.drawtype ~= 'airlike') or 
-            (nodeb and nodeb.drawtype ~= 'airlike') or 
-            (noder and noder.drawtype ~= 'airlike') or 
+            (nodef and nodef.drawtype ~= 'airlike') or
+            (nodeb and nodeb.drawtype ~= 'airlike') or
+            (noder and noder.drawtype ~= 'airlike') or
             (nodel and nodel.drawtype ~= 'airlike') then
 			collision = true
 		end
@@ -308,7 +283,6 @@ function trike.testImpact(self, velocity)
     if collision then
         local damage = impact / 2
         self.hp_max = self.hp_max - damage --subtract the impact value directly to hp meter
-        local curr_pos = self.object:get_pos()
 
         if self.driver_name then
             minetest.sound_play("collision", {
@@ -325,7 +299,7 @@ function trike.testImpact(self, velocity)
 
             --minetest.chat_send_all('damage: '.. damage .. ' - hp: ' .. self.hp_max)
             if self.hp_max < 0 then --if acumulated damage is greater than 50, adieu
-                trike.destroy(self)   
+                trike.destroy(self)
             end
 
             local player = minetest.get_player_by_name(player_name)
@@ -387,9 +361,7 @@ function trike.flightstep(self)
     local yaw = rotation.y
 	local newyaw=yaw
     local pitch = rotation.x
-    local newpitch = pitch
 	local roll = rotation.z
-	local newroll=roll
 
     local velocity = self.object:get_velocity()
     self.object:set_velocity(velocity) --hack to avoid glitches
@@ -398,7 +370,8 @@ function trike.flightstep(self)
 
     local longit_speed = vector.dot(velocity,hull_direction)
     self._longit_speed = longit_speed
-    local longit_drag = vector.multiply(hull_direction,longit_speed*longit_speed*LONGIT_DRAG_FACTOR*-1*trike.sign(longit_speed))
+    local longit_drag = vector.multiply(hull_direction,longit_speed*longit_speed*LONGIT_DRAG_FACTOR*
+                            -1*trike.sign(longit_speed))
 	local later_speed = trike.dot(velocity,nhdir)
     --minetest.chat_send_all('later_speed: '.. later_speed)
 	local later_drag = vector.multiply(nhdir,later_speed*later_speed*LATER_DRAG_FACTOR*-1*trike.sign(later_speed))
@@ -407,8 +380,6 @@ function trike.flightstep(self)
 
     local player = nil
     if self.driver_name then player = minetest.get_player_by_name(self.driver_name) end
-    local passenger = nil
-    if self._passenger then passenger = minetest.get_player_by_name(self._passenger) end
 
     local curr_pos = self.object:get_pos()
     self.object:set_pos(curr_pos)
@@ -421,7 +392,8 @@ function trike.flightstep(self)
 
 	if is_attached then
         --control
-		accel, stop = trike.control(self, self.dtime, hull_direction, longit_speed, longit_drag, later_speed, later_drag, accel, player, is_flying) or vel
+		accel, stop = trike.control(self, self.dtime, hull_direction,
+            longit_speed, longit_drag, later_speed, later_drag, accel, player, is_flying)
     else
         -- for some engine error the player can be detached from the machine, so lets set him attached again
         trike.checkattachBug(self)
@@ -429,9 +401,10 @@ function trike.flightstep(self)
     trike.testImpact(self, velocity)
 
     -- new yaw
-	if math.abs(self._rudder_angle)>5 then 
+	if math.abs(self._rudder_angle)>5 then
         local turn_rate = math.rad(24)
-		newyaw = yaw + self.dtime*(1 - 1 / (math.abs(longit_speed) + 1)) * self._rudder_angle / 30 * turn_rate * trike.sign(longit_speed)
+		newyaw = yaw + self.dtime*(1 - 1 / (math.abs(longit_speed) + 1)) *
+            self._rudder_angle / 30 * turn_rate * trike.sign(longit_speed)
 	end
 
     -- calculate energy consumption --
@@ -443,13 +416,13 @@ function trike.flightstep(self)
 	local snormal = {x=sdir.z,y=0,z=-sdir.x}	-- rightside, dot is negative
 	local prsr = trike.dot(snormal,nhdir)
     local rollfactor = -20
-    newroll = (prsr*math.rad(rollfactor))*(later_speed)
+    local newroll = (prsr*math.rad(rollfactor))*(later_speed)
     --minetest.chat_send_all('newroll: '.. newroll)
     ---------------------------------
     -- end roll
 
     -- pitch
-    newpitch = self._angle_of_attack/200 --(velocity.y * math.rad(6))
+    local newpitch = self._angle_of_attack/200 --(velocity.y * math.rad(6))
 
     -- adjust pitch by velocity
     if is_flying == false then --isn't flying?