A quad copter also called quad rotor or quad rotor helicopter is an example of multi rotor.In quad copter, generally there are two pairs of identical fixed pitched propeller. Two clockwise and two counterclockwise propeller.By varying each rotor speed, thrust produced and as a result,the quad copter gets lifted up How Does it Work? Before you start choosing your components, it's learn about how they work with your quadcopter. Let's begin with the frame of your quadcopter. The frame provides the structure and rigidity and it's where all the component will be mounted on it. The flight controller manipulates the RPM of the individual motor in responses to user input. If you tell it go backward, the flight controller adjust the RPM of motor so it go backward. The ESC are take signal from the flight controller and the adjust the speed of motor. The motor and propeller provide the thrust and lift for your quadcopter. The battery provide power to all com...