func release_rocket():
	if rocketNumber > 0:
		var new_rocket      = rocket_object.instance()
		rocketNumber = rocketNumber - 1
		var totalMass = mass + (mass_rocket * rocketNumber)
		new_rocket.position = position + rocket_spawn_offset



		# TODO: set starting velocity for new_rocket
		# TODO: satisfy the conservation of momentum principle:
		#		(i)   for bomb being dropped
		#Vs = ((ms + mp) * v0) / ms
		#Vp = (mp*Vo) / mp
		new_rocket.velocity.x = (mass_rocket * velocity.x) / mass_rocket
		velocity.x = ((totalMass + mass_rocket) * velocity.x ) / totalMass
		#		(ii)  for bomb being thrown in the direction oposite to plane's velocity
		#		(iii) for bomb being thrown in any direction
		get_parent().add_child( new_rocket )