Flying object and flying object system

A flying object system comprising:

• a flying object;
• and
• a master unit configured to be detachably connectable with the flying object,
• wherein the flying object comprises:
• a rotor blade configured to generate lift or thrust by rotating;
• and
• a rotating electrical machine unit configured to rotate the rotor blade,
• wherein the rotor blade is configured to receive wind power and rotate when not flying,
• wherein the rotating electrical machine unit is configured to generate electric power based on a power that rotates the rotor blade when not flying,
• wherein the master unit comprises a departure/arrival device configured to rotate the flying object around an axis in a horizontal direction,
• wherein the departure/arrival device comprises a departure/arrival platform configured to fix the flying body, and a rotating device whose one end is rotatably connected to the departure/arrival platform,
• wherein the master unit comprises a swing device configured to rotate in a circumferential direction around a vertical axis passing through a center of the master unit, and is configured to rotate so that the longitudinal direction of the departure/arrival device is perpendicular to the wind direction, and
• wherein the departure/arrival device is configured to:
• allow, when the rotating electrical machine unit generates electric power, the rotating device to rotate the departure/arrival platform around an axis in a longitudinal direction of the departure/arrival device, and make a rotation axis direction of the rotor blade rotate in a direction in which the rotor blade receives the wind power and rotate;
• and
• make, when the flying object takes off, the rotation axis direction rotate in a direction in that the flying object takes off.