A multirotor 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 in model and radio control aircraft projects in which the names tricopter, quadcopter, hexacopter and octocopter are frequently used to refer to 3, 4, 6 and 8 rotor respectively.
multirotors configurations
1-Tricopter
The choice of frame will effect many aspects of the multicopter, including efficiency, lifting power, flight times and stability. The number of physical engines present is also important,for every configuration there are advantages and disadvantages we will discuss it later.
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