FOLDED AERODYNAMIC SURFACE Russian patent published in 2019 - IPC F42B10/20 

FIELD: aviation.

SUBSTANCE: invention relates to aircraft, starting from a limited volume of carrier at high aerodynamic loads. Folding aerodynamic surface contains a base and a rotary blade pivotally connected to it, two cylinders coaxially with the folding axis and interacting with each other a piston-pusher sliding inside the first cylinder, and a screw rod, with the ends entering the internal cavities of the cylinders, one of which is connected to the base, and the second to the blade. Second cylinder has screw grooves of a different direction than the screw grooves of the first cylinder, and the splines of the screw rod, interacting with the grooves of the cylinders, change their direction from one to the other in the middle part of the rod, which responds to the screw grooves of the cylinders. Second piston is inserted coaxially with the rod and an additional piston interacting with it with the throttle. Interacting surfaces of the ends of the rod with the pistons are made in the form of a flat-spherical interface, while the spherical surface is made on the ends of the rod or on the ends of the pistons. In the blade perpendicular to the folding axis, there is a blind hole in which a spring-loaded wedge lock is installed, which, when the blade is fully folded, is inserted into a wedge groove made in the annular protrusion.

EFFECT: invention is directed to achieving optimal overall mass characteristics.

1 cl, 5 dwg