| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem in a conventional small unmanned aircraft, wherein a flight operation for long hours is difficult, although having superior flight performance peculiar to a rotor craft.SOLUTION: In a small unmanned aircraft V, drive parts 1 generating upward thrust are arranged at four positions from the center of an aircraft body B. Each drive part 1 coaxially includes a rotated and driven rotor 2 at an inner side and a rotatably held ring body 3 at an outer side, wherein a rotation center line CL is inclined so that a portion of the ring body 3 is brought into contact relative to a horizontal surface. By means of a structure provided with a clutch mechanism 5 for connecting and disconnecting power transmission from a rotary drive shaft 4 to the ring body 3 between the rotary drive shaft 4 of the rotor 2 and the ring body 3, both flight performance and travel performance are provided to achieve operation for long hours. |
