The rotor blade of the helicopter as a whole has a wing-shaped shape and consists of two parts. In this case, one part smoothly passes into another, and the first part closer to the 0,8R axis, where: z – current<z<rotation, has a sinusoidal shape with a smaller bend Δ = 0.1 at 0 R has a bigger<z<radial coordinate, R – the total length of the blade, the second part at 0,8R sinusoidal bend Δ = 0.2. The section of the blade has a parabolic shape, which is described by the formula y = x (1-x).

The utility model refers to the means of air transport, in particular concerns the rotor blades of such flying vehicles as helicopters.

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