Quadcopter or Bascially know as quadrotors are a diverse catagory of drones. These kind of drones can be controlled by pilots or can be autonomous. It has a configuration of 4 motors and a flight controller, i.e. the heart of the quad. Quads now a days are ment to serve for different applications such as Photography, racing, surveillance and many others. It can have an edurance ranging from a min to hours serving the nature of flight. Air taxi is one of the marvels inspired by quadrotors.