quadcopter drone

grabcad

A quadcopter is a multirotor drone with four arms or booms, each with a rotor (hence “quad copter”). Multirotor drones are unmanned aerial vehicles (UAV) with multiple rotors that are used to generate lift to enable the aircraft to fly. The working principle is that one pair of rotors turns clockwise and the other anti-clockwise, and by varying the speeds it is possible to generate thrust as well as turning motions.