09 August 2016

Technodinamika Holding, part of the Rostec State Corporation, is developing the newest electric actuators for use on the MC-21, a future Russian short/medium haul aircraft. The work is underway within the open competition to carry out research and development on systems and components for Russian aircraft announced by Russia’s Ministry of Industry and Trade and won by the holding company.

Under the contract with the Ministry, Technodinamika will develop three types of electric actuators: for trimming the stabilizer, opening the cargo door and APU air inlet doors. The front-end engineering design of all the three actuators will be completed before the end of 2016. The actuators are expected to have a lifetime of at least 30 years.

The stabilizer trim mechanism for the MC-21 will be a dual-channel electromechanical system, in which one channel is active, while the second is in hot standby. An integrated monitoring system continuously monitors the performance of the electric actuator and, if the channel fails, the standby channel will be activated. Emergency shutdown of the electric actuator takes place in response to external signals from the control module in emergency situations.

The electric actuator of APU air inlet doors is designed to open or close them when starting and shutting down the power plant.
The electric actuator operating the cargo doors is used on the ground: it moves the doors in response to signals from the control panel and holds them in any intermediate position. Two actuator sets are installed on aircraft.

“Today, new requirements are imposed on aircraft, they must comply with a new technology level, and the transition first to the “more electric aircraft” concept and then to all-electric aircraft becomes the key trend here,” says Technodinamika CEO Maxim Kuzyuk. “Abandoning hydraulic and pneumatic systems significantly increases aircraft reliability, facilitates the connection of actuators and reduces the need for their maintenance.”