Multirotor
A multirotor[1] or multicopter is a rotorcraft with more than two rotors. Multirotors often use fixed-pitch blades, whose rotor pitch does not vary as the blades rotate; control of vehicle motion is achieved by varying the relative speed of each rotor to change the thrust and torque produced by each.
Due to their ease of both construction and control, multirotor aircraft are frequently used as amateur model aircraft projects.[2][3][4][5]
Examples
- Cierva Air Horse - a British three rotor helicopter, three rotors were used to give a large lift without compromising rotor strength.
- Quadrotors - Etienne Oehmichen and George de Bothezat built and flew quadrotor designs in the 1920s.
- e-volo - a German prototype electric multicopter with 16 rotors, the first electric multicopter in the world to achieve manned flight.[6] The large number of low-cost motors make it economical, quiet and provide redundancy with ability to maintain control with up to four failed motors.[7]
References