This decision was made at the Scientific and Technical Council organized by the Institute of Avionics Engineering “Navigator”, with the participation of the Zhukovsky Central Aerohydrodynamic Institute (TsAGI) and the Russian Helicopters Holding.
The loss of the efficiency of the tail rotor (LTE) is a spontaneous rotation of helicopters of a single-rotor (classical) scheme with a tail rotor, observed mainly at the stages of hovering, takeoff and landing, during translational flight at low speeds, in the mode of axial flow around the main rotor or transients to it. This is caused by malfunctions of the track control, destruction of the transmission, malfunctions of the intermediate or rear gearboxes. The process of getting into an annular vortex with loss of thrust develops in a few seconds. This is the most common cause of aviation accidents, many of which end in disaster and lead to the loss of the aircraft and the death of the crew.
"There are aerobatics techniques that allow the crew to take the car out of the vortex ring, but we have set ourselves a task, the solution of which is that not only the skill of the pilot, but also the aircraft system itself should be responsible for safety in the air, in order to completely exclude even the possibility of such an accident," said Sergey Baburov, CEO of Navigator JSC.
It is planned that the new warning system will inform the pilot when he goes beyond the limits prescribed by the flight protocol, admits violations that can lead to a LTE.
During the meeting, TsAGI presented materials on statistics and the causes of the uncontrolled fall of a single-rotor helicopter. The developments obtained at a specialized full-scale stand are demonstrated. To improve the accuracy of determining the situation of a helicopter hitting a dangerous turn, it is proposed to use air signal systems (SHS) as part of avionics, providing more accurate measurement of flight speed (at low speeds), wind speed and direction.