Rotary-wing aircraft

1. A rotary-wing aircraft comprising:

a plurality of rotary wings;

an arm portion that supports the plurality of rotary wings;

a first mounting portion for mounting an object; and

a connecting portion that connects the first mounting portion to the arm portion in a state in which the first mounting portion is movable within a predetermined range,

wherein a position of the connecting portion is

at a body receiving a lift generated by rotation of the plurality of rotary wings,

on a plane extending through a position within a width of each of the plurality of rotary wings, wherein the width is measured in a direction parallel to a rotation axis for each of the plurality of rotary wings, and

at a center of a circle passing through a rotary shaft of each of the plurality of rotary wings.

2. The rotary-wing aircraft according to claim 1 , wherein, in a case of moving in a direction including a horizontal direction, a posture of the body is changed by making a rotational speed of a rotary wing located on a rear side in a traveling direction higher than a rotational speed of a rotary wing located on a front side in the traveling direction, and, after the posture of the body is changed, movement in the direction including the horizontal direction is caused by reducing a difference between the rotational speed of the rotary wing located on the front side in the traveling direction and the rotational speed of the rotary wing located on the rear side in the traveling direction.

3. The rotary-wing aircraft according to claim 1 , wherein the connecting portion connects a second mounting portion that is disposed on an opposite side to the first mounting portion as viewed from the connecting portion and connected to the first mounting portion to the arm portion together with the first mounting portion.

4. The rotary-wing aircraft according to claim 3 , further comprising an antenna mounted on the second mounting portion for receiving a signal for positioning.

5. The rotary-wing aircraft according to claim 1 , further comprising a center-of-gravity moving mechanism for moving a center of gravity of the body.

6. The rotary-wing aircraft according to claim 1 , further comprising:

a support rod connecting the first mounting portion and the connecting portion, and configured to move relative to the arm portion through the connecting portion, wherein the first mounting portion is connected to an end of the support rod.

7. The rotary-wing aircraft according to claim 6 , wherein the support rod is at a non-perpendicular angle with respect to the rotation axis for each of the plurality of rotary wings.

8. The rotary-wing aircraft according to claim 7 , further comprising a center portion connecting the arm portion to the connecting portion.