ROTORCRAFT Russian patent published in 2018 - IPC B64C27/10 B64C29/02 B64C39/02 

FIELD: aircraft engineering.

SUBSTANCE: rotorcraft comprises a housing comprising an elongated tubular skeleton or a skeleton tube and a coaxial main rotors system of opposite direction of rotation. Each main rotor has an independent engine for driving the rotors around the common axis of rotation of both main rotors. Main rotors system comprises the first and the second pitch control devices located between the plane of rotation of the first rotor and the plane of rotation of the second rotor in order to control the pitch of the blades of the corresponding variable pitch main rotors. Pitch control devices rotate about the rotational axis of the main rotors turned by such an angle one relative to the other, that the first links of the pitch control and the second links of the pitch control are located around the nonrotating skeleton alternating with each other and are alternately connected to the first pitch control device and the second pitch control device.

EFFECT: provided is a compact design and reduced aerodynamic drag during flight at a high speed.

40 cl, 54 dwg