PROPELLER BLADE WITH CONTROLLED GEOMETRY OF PROFILE Russian patent published in 2019 - IPC B64C27/615 B64C27/473 B64C11/20 

FIELD: aviation.

SUBSTANCE: invention relates to the field of aviation, in particular to propeller designs. Propeller blade with controlled geometry of profile comprises aerodynamic profile with interconnected front part and movable flap. Movable flap includes load-carrying resilient upper and lower lining, elastic element arranged between them, protective flexible elastic coating forming external outline of blade flap profile, piezoelectric elements located on one or both surfaces of the resilient element and connected to the upper and lower lining. Resilient element is made with low rigidity for bending in the plane of the blade profile, stretched along the middle line of the blade profile and pre-stressed longitudinal axial tensile forces in cross sections, which balance the compressive forces in the sections of the upper and lower covers of the blade flap, wherein piezoelectric elements are located between surfaces of resilient element and inner surfaces of upper and/or lower lining of blade flap and attached to them.

EFFECT: higher operating range of controlled bending deformations of blade flap.

8 cl, 2 dwg