The American company Bell Helicopter has announced the development of the electrical system tail rotors and compensation of reactive torque for helicopters. As writes the Vertical, the system is tested on a modified multi-purpose helicopter Bell 429 in Mirabel in the canadian city of Quebec from may 2019. In total the modified helicopter has already flown 25 hours.
Today the developers of helicopters working on options for the use of electric motors in their aircraft.In particular, some projects involve the replacement of a single turboshaft engine with an electric motor for twin-engine machines. It is believed that this configuration will reduce the weight of the aircraft, increasing its sustainability and capacity.
Bell Helicopter developed the system of compensation of the reactive moment called the EDAT (electrically distributed anti-torque electric distributed system anti-rotation). It consists of four small electric fenestron installed in the rear instead of the traditional tail rotor.
The yaw control is the same pedal as that of a conventional steering screw, but the commands to the new system are not transmitted through the rods, and with wire system.
The company argued that their power system compensation of reactive torque of the rotor is quite reliable — it is able to perform its function even in case of failure of three of the four fenestrae. In addition, it is argued that it is quieter than a traditional tail rotor. Other details about the system Bell Helicopter has not yet disclose.
Bell Helicopter is developing electrical systems for compensation of reactive torque of the main rotor of the helicopter for the last several years. In 2017, the company presented a prototype of the electrical system of compensation of reactive torque, consisting of a fan in the tail boom and controlled lateral nozzles. Prototype systems are already being tested.