The use of a multi-fenestron tail rotor system on a helicopter to improve flight safety

Safety of helicopter tail rotor flights depends largely on the reliability of the tail rotor control system. Tail rotor damage and failure in many cases can lead to catastrophic consequences. Helicopters having a fenestron have certain advantages over helicopters having a conventional tail rotor in terms of safety and reliability, but failure of the fenestron can also lead to catastrophic consequences. In order to improve the safety and reliability of a helicopter that has a tail rotor to compensate the reactive torque of the main rotor, a multi-fenestron control system is proposed in this undergraduate work. Within the framework of this work, conceptual design of the helicopter with multi-fenestration system, which has features, and as a result, an algorithm for designing a helicopter with multi-fenestration system was developed. In this work, also evaluated the level of improvement of safety and reliability of the helicopter with a multi-fenestration system in comparison with the traditional scheme, calculations showed the provision of a high level of reliability for a sufficiently long operating period.