Unmanned aircraft, and method for controlling unmanned aircraft

An unmanned aerial vehicle comprising:

• a plurality of rotors;
• a first type of rotation driver to drive one or more first rotors included in the plurality of rotors;
• a second type of rotation driver to drive one or more second rotors included in the plurality of rotors;
• and
• a controller configured or programmed to control rotation of the plurality of rotors by controlling the first type of rotation driver and the second type of rotation driver;
• wherein
• the controller is configured or programmed to control the first type of rotation driver and the second type of rotation driver, when performing a landing operation, to generate a difference between a first thrust that is a sum of thrust generated by the one or more first rotors and a second thrust that is a sum of thrust generated by the one or more second rotors that is less than a difference between the first thrust and the second thrust during hovering.