“The Hexacopter” by ALMA (ESO/NAOJ/NRAO)
- A multirotor or multicopter is a rotorcraft with more than two rotors. An example of a common multirotor rotorcraft is a hexacopter (shown to the right). An advantage of multirotor aircraft is the simpler rotor mechanics required for flight control. Unlike single- and double-rotor helicopters which use complex variable pitch rotors whose pitch varies as the blade rotates for flight stability and control, multirotors often use fixed-pitch blades; control of vehicle motion is achieved by varying the relative speed of each rotor to change the thrust and torque produced by each.