Transmission system

A transmission system (1) comprising a body (2) on an air vehicle;

• at least one engine (3) that provides a required power for the flight of the body (2);
• at least one rotor (4) connected to the engine (3) and enabling blades of the air vehicle to rotate;
• at least one shaft (5) that transmits the movement of the engine (3) to the rotor (4);
• at least a first transfer element (6) located on the shaft (5);
• at least a first spindle (7) transmitting the engine (3) drive to the propulsion system (P) and/or anti-torque system (T) that provide movement of the air vehicle;
• a first spindle element (8) located on the first spindle (7) and allowing the movement of the first spindle (7);
• an intermediate transfer element (9) that transmits the engine (3) drive from the first transfer element (6) to the first spindle element (8) and rotor (4), a second spindle (10) extending along the direction that the first spindle (7) extends;
• the second spindle (10) rotating around its own axis independently of the first spindle (7);
• a second spindle element (11) located on the second spindle (10);
• a transfer equipment (12) that allows the second spindle (10) to rotate when the first spindle element (8) triggers the second spindle element (11);
• the first spindle (7) and second spindle (10), one of which drives the propulsion system (P) while the other drives the anti-torque system (T), wherein the second spindle (10) is located in the first spindle (7), or on the first spindle (7) to surround the first spindle (7).