Object that rotates in a flow of air, suitable for recreational use

An object (1;

• 101;
• 201) intended to rotate in a flow of air (F), notably for recreational use, comprising a plate (2) with a general planar aspect, globally extending along a plane (P) the plate (2) having a center of inertia (I) and comprising:
• a rear face (4) including a central area (16) located in the vicinity of the center of inertia (I), on which an operator (6) is intended to exert a pressure force (F1), either directly or via a support, during periods of use of the object (1;
• 101;
• 201);
• a front face (8) intended to receive the flow of air (F) substantially along an axis (Iz) passing through the center of inertia (I) and perpendicular to the plane (P);
• a peripheral portion (10, 210) encompassing an edge (12) of the plate (2);
• and
• a main portion (14) extending between the peripheral portion and including the central area (16);
• the plate (2) having a stable shape at rest, preferably able to be piled up, and having this shape after each of the periods of use,
• the plate (2) having, during any of the periods of use, a shape in use such that:
• the pressure force (F1) exerted by the operator balances a resulting force (F2) exerted by the flow of air (F) on the plate (2), so that the central area (16) remains in contact with the operator (6) or the support, and
• the flow of air (F) exerts a torque on the plate (2) causing rotation of the plate (2) substantially around the axis (Iz).