The new aircraft flap design for the MC-21-310, developed by engineers at PAO "Yakovlev," will directly make the airliner more efficient and economical. This was stated by Rostec.
The state corporation explained that flaps help an aircraft take off and land. However, during cruise flight, a small gap remained between the flaps, which worsened the aerodynamic qualities of the wing.
The designers created a special movable element that closes the gap during cruise flight. During takeoff and landing, the element retracts — without additional mechanisms or actuators. As a result, aerodynamics improve, fuel is saved — everything looks great.
PAO "Yakovlev" had previously explained that the design includes a spring-loaded mechanism with two lever-type hinged joints and a longitudinal rod.
When the flap is extended, the elements shift, and when retracted, the movable end returns and presses tightly against the adjacent section. This ensures sealing and stable aerodynamics in all operating modes.