TURBOMOTOR COMPRISING A CONTROLLED MECHANICAL COUPLING DEVICE, HELICOPTER EQUIPPED WITH SUCH A TURBOMOTOR, AND METHOD OF OPTIMIZING THE SUPER-SLOWING SYSTEM WITH NULL POWER OF SUCH A HELICOPTER

摘要

The invention relates to a turbine engine comprising a gas generator (5) adapted to be rotated and a free turbine (6) driven in rotation by the gases of said gas generator, characterized in that it comprises a device (40). controlled mechanical coupling of said gas generator (5) and said free turbine (6) adapted to mechanically and commandably link said gas generator (5) and said free turbine (6) as soon as the rotational speed of said generator (5) ) gas reaches a predetermined threshold speed.