Specialists at Perm Polytechnic University have developed a new airscrew blade with controllable airfoil geometry. The advanced solution will make it possible to change the flap position in flight and expand its range of deflection.
The design includes an aerodynamic profile with a movable flap and a piezoelectric torsion drive. It was made in the form of a hollow cylinder with spiral electrodes that, when voltage is applied, cause a controlled rotation of the flap.
This design provides greater working displacement compared with traditional solutions.
The developers emphasize that increasing the deflection angles makes it possible to more precisely match the shape of the blade's trailing edge to the flight mode. This reduces vibration and noise and also improves aerodynamic efficiency.
The technology is intended for helicopters and propeller-driven aircraft, where rapid adaptation of blade geometry is required. Modeling has already confirmed the stability of the mechanism and the expansion of the range of controlled flap rotations.
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