diff --git a/README.md b/README.md
index 238a8b6..e6dd6de 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,3 @@
-helicopter
-==========
-
-Mod that adds helicopter to the Minetest
+Minetest 0.4.9 mod: Simple helicopter
+=======================
+by Pavel_S
\ No newline at end of file
diff --git a/depends.txt b/depends.txt
new file mode 100644
index 0000000..4ad96d5
--- /dev/null
+++ b/depends.txt
@@ -0,0 +1 @@
+default
diff --git a/init.lua b/init.lua
new file mode 100644
index 0000000..f2b4eec
--- /dev/null
+++ b/init.lua
@@ -0,0 +1,317 @@
+
+--
+-- Helper functions
+--
+
+local function get_sign(i)
+	if i == 0 then
+		return 0
+	else
+		return i/math.abs(i)
+	end
+end
+
+local function get_velocity(vx, vy, vz, yaw)
+	local x = math.cos(yaw)*vx+math.cos(math.pi/2+yaw)*vz
+	local z = math.sin(yaw)*vx+math.sin(math.pi/2+yaw)*vz
+	return {x=x, y=vy, z=z}
+end
+
+local function get_v(v)
+	return math.sqrt(vx^2+vz^2)
+end
+
+--
+-- Heli entity
+--
+
+local heli = {
+	physical = true,
+	collisionbox = {-1,-0.6,-1, 1,0.3,1},
+	
+	--Just copy from lua api for test
+	collide_with_objects = true,
+	weight = 5,
+	
+	visual = "mesh",
+	mesh = "root.x",
+	--Player
+	driver = nil,
+	
+	--Heli mesh
+	model = nil,
+	
+	--In progress
+	motor = nil,
+	left = true,
+	timer=0,
+	
+	--Rotation
+	yaw=0,
+	
+	--Detect hit an object or node
+	prev_y=0,
+	
+	--Speeds
+	vx=0,
+	vy=0,
+	vz=0
+	
+	
+}
+local heliModel = {
+	visual = "mesh",
+	mesh = "heli.x",
+	textures = {"blades.png","blades.png","heli.png","Glass.png"},
+}	
+local motor = {
+	physical = true,
+	collisionbox = {-2,0.5,-1, 1,1,1},
+	visual = "mesh",
+	mesh = "motor.x",
+	textures = {"motor.png"},
+	driver = nil,
+	left = true,
+	timer=0,
+	vx = 0,--Velo. for/back-ward
+	vy = 0,--Velo. up/down
+	vz = 0--Velo. side
+}
+
+function heli:on_rightclick(clicker)
+	if not clicker or not clicker:is_player() then
+		return
+	end
+	if self.driver and clicker == self.driver then
+		clicker:set_attach(self.model, "Root", {x=0,y=0,z=0}, {x=0,y=0,z=0})
+		self.driver = nil
+		clicker:set_detach()
+		self.model:set_animation({x=0,y=1},0, 0)
+	elseif not self.driver then
+		self.model:set_animation({x=0,y=10},10, 0)
+		self.driver = clicker
+		--self.driver:set_animation({ x= 81, y=160, },10,0)
+		clicker:set_attach(self.model, "Root", {x=0,y=0,z=-10}, {x=-90,y=0,z=-90})
+		--self.object:setyaw(clicker:get_look_yaw())
+	end
+end
+
+function heliModel:on_activate(staticdata, dtime_s)
+	self.object:set_armor_groups({immortal=1})
+	local is_attached = false
+	for _,object in ipairs(minetest.env:get_objects_inside_radius(self.object:getpos(), 2)) do
+		if object and object:get_luaentity() and object:get_luaentity().name=="helicopter:heli" then
+			if object:get_luaentity().model == nil then
+				object:get_luaentity().model = self
+			end
+			if object:get_luaentity().model == self then
+				is_attached = true
+			end
+		end
+	end
+	if is_attached == false then
+		self.object:remove()
+	end
+	
+end
+
+function heli:on_activate(staticdata, dtime_s)
+	self.object:set_armor_groups({immortal=1})
+	self.prev_y=self.object:getpos()
+	if self.model == nil then
+		self.model = minetest.env:add_entity(self.object:getpos(), "helicopter:heliModel")
+		self.model:set_attach(self.object, "Root", {x=0,y=0,z=2}, {x=0,y=0,z=0})	
+	end
+end
+
+function heli:get_staticdata(self)	
+end
+
+function heli:on_punch(puncher, time_from_last_punch, tool_capabilities, direction)
+	if self.model ~= nil then
+		self.model:remove()
+	end
+	self.object:remove()
+	if puncher and puncher:is_player() then
+		puncher:get_inventory():add_item("main", "helicopter:heli")
+	end
+end
+function heliModel:on_punch(puncher, time_from_last_punch, tool_capabilities, direction)
+	self.object:remove()
+end
+function heli:on_step(dtime)
+	--Prevent shaking heli while sitting in it
+	
+	
+	--Prevent multi heli control bug
+	if self.driver and ( math.abs(self.driver:getpos().x-self.object:getpos().x)>10*dtime or math.abs(self.driver:getpos().y-self.object:getpos().y)>10*dtime or math.abs(self.driver:getpos().z-self.object:getpos().z)>10*dtime) then
+		self.driver = nil
+	end
+	
+	if self.driver then
+		--self.driver:set_animation({ x= 81, y=160, },10,0)
+		self.yaw = self.driver:get_look_yaw()
+		v = self.object:getvelocity()
+		local ctrl = self.driver:get_player_control()
+		--Forward/backward
+		if ctrl.up then
+			self.vx = self.vx + math.cos(self.driver:get_look_yaw())*0.1
+			self.vz = self.vz + math.sin(self.driver:get_look_yaw())*0.1
+		end
+		if ctrl.down then
+			self.vx = self.vx-math.cos(self.driver:get_look_yaw())*0.1
+			self.vz = self.vz-math.sin(self.driver:get_look_yaw())*0.1
+		end
+		--Left/right
+		if ctrl.left then
+			self.vz = self.vz+math.cos(self.driver:get_look_yaw())*0.1
+			self.vx = self.vx+math.sin(math.pi+self.driver:get_look_yaw())*0.1
+		end
+		if ctrl.right then
+			self.vz = self.vz-math.cos(self.driver:get_look_yaw())*0.1
+			self.vx = self.vx-math.sin(math.pi+self.driver:get_look_yaw())*0.1
+		end
+		--up/down
+		if ctrl.jump then
+			if self.vy<1.5 then
+				self.vy = self.vy+0.2
+			end
+		end
+		if ctrl.sneak then
+			if self.vy>-1.5 then
+				self.vy = self.vy-0.2
+			end
+		end
+		--
+		--Speed limit
+		if math.abs(self.vx) > 4.5 then
+			self.vx = 4.5*get_sign(self.vx)
+		end
+		if math.abs(self.vz) > 4.5 then
+			self.vz = 4.5*get_sign(self.vz)
+		end
+		
+	end
+	
+	--Decelerating
+	local sx=get_sign(self.vx)
+	self.vx = self.vx - 0.02*sx
+	local sz=get_sign(self.vz)
+	self.vz = self.vz - 0.02*sz
+	local sy=get_sign(self.vy)
+	self.vy = self.vy-0.01*sy
+	
+	--Stop
+	if sx ~= get_sign(self.vx) then
+		self.vx = 0
+	end
+	if sz ~= get_sign(self.vz) then
+		self.vz = 0
+	end
+	
+	
+	--Speed limit
+	if math.abs(self.vx) > 4.5 then
+		self.vx = 4.5*get_sign(self.vx)
+	end
+	if math.abs(self.vz) > 4.5 then
+		self.vz = 4.5*get_sign(self.vz)
+	end
+	if math.abs(self.vy) > 4.5 then
+		self.vz = 4.5*get_sign(self.vz)
+	end
+	
+	--Set speed to entity
+	self.object:setvelocity({x=self.vx, y=self.vy,z=self.vz})
+	--Model rotation 
+	--[[if self.driver then
+	self.model:set_attach(self.object,"Root", 
+	{x=-(self.driver:getpos().x-self.object:getpos().x)*dtime,
+	y=-(self.driver:getpos().z-self.object:getpos().z)*dtime,
+	z=-(self.driver:getpos().y-self.object:getpos().y)*dtime}, {
+			x=-90+self.vz*5*math.cos(self.yaw)-self.vx*5*math.sin(self.yaw), 
+			y=0-self.vz*5*math.sin(self.yaw)-self.vx*5*math.cos(self.yaw), 
+			z=self.yaw*57})
+	else]]--
+	if self.model then
+		self.model:set_attach(self.object,"Root", {x=0,y=0,z=0}, {
+			x=-90+self.vz*4*math.cos(self.yaw)-self.vx*4*math.sin(self.yaw), 
+			y=0-self.vz*4*math.sin(self.yaw)-self.vx*4*math.cos(self.yaw), 
+			z=self.yaw*57})
+	end
+end
+
+--
+--Registration
+--
+
+minetest.register_entity("helicopter:heli", heli)
+minetest.register_entity("helicopter:heliModel", heliModel)
+minetest.register_entity("helicopter:motor", motor)
+--minetest.register_entity("helicopter:rocket", rocket)
+
+--
+--Craft items
+--
+
+--Blades
+minetest.register_craftitem("helicopter:blades",{
+	description = "Blades",
+	inventory_image = "blades_inv.png",
+	wield_image = "blades_inv.png",
+})
+--Cabin
+minetest.register_craftitem("helicopter:cabin",{
+	description = "Cabin for heli",
+	inventory_image = "cabin_inv.png",
+	wield_image = "cabin_inv.png",
+})
+--Heli
+minetest.register_craftitem("helicopter:heli", {
+	description = "Helicopter",
+	inventory_image = "heli_inv.png",
+	wield_image = "heli_inv.png",
+	wield_scale = {x=1, y=1, z=1},
+	liquids_pointable = false,
+	
+	on_place = function(itemstack, placer, pointed_thing)
+		if pointed_thing.type ~= "node" then
+			return
+		end
+		pointed_thing.under.y = pointed_thing.under.y+1
+		minetest.env:add_entity(pointed_thing.under, "helicopter:heli")
+		--minetest.env:add_entity(pointed_thing.under, "helicopter:heliModel")
+		--minetest.env:add_entity(pointed_thing.under, "helicopter:motor")
+		itemstack:take_item()
+		return itemstack
+	end,
+})
+
+--
+--Craft
+--
+
+minetest.register_craft({
+	output = 'helicopter:blades',
+	recipe = {
+		{'', 'default:steel_ingot', ''},
+		{'default:steel_ingot', 'group:stick', 'default:steel_ingot'},
+		{'', 'default:steel_ingot', ''},
+	}
+})
+minetest.register_craft({
+	output = 'helicopter:cabin',
+	recipe = {
+		{'', 'group:wood', ''},
+		{'group:wood', 'default:mese_crystal','default:glass'},
+		{'group:wood','group:wood','group:wood'},		
+	}
+})		
+minetest.register_craft({
+	output = 'helicopter:heli',
+	recipe = {
+		{'', 'helicopter:blades', ''},
+		{'helicopter:blades', 'helicopter:cabin',''},	
+	}
+})	
+