UNMANNED CONVERTIBLE HIGH-SPEED HELICOPTER Russian patent published in 2016 - IPC B64C27/22 B64C29/00 

FIELD: aircraft engineering.

SUBSTANCE: invention relates to aircraft engineering, particularly, to drones designes. Unmanned convertible high-speed helicopter (UCHH) is equipped with a system of distributed thrust of different-size rotors as per X2+1 scheme having equal sized crossed main rotors installed on a vertical pillar in the central part of the fuselage on elongated V-shaped output shafts of the intermediate reduction gear inclined at the angles of 12.5° from the vertical plane forward and backward along the axis of symmetry, respectively, and one pusher rear tilt rotor. UCHH has the possibility of converting the flight configuration from the three-rotor longitudinal helicopter configuration into the one of a three-rotor rotorcraft with a two-rotor propulsion-bearing longitudinal system and with a cruise rear pusher rotor. Pusher rotor is mounted behind a trapezoidal vertical tail and a swept stabilizer, the swing of the straightened section of the rear edge and the end part of which are larger than the rear pusher rotor diameter and limit by the top and the bottom parts of the swept fin-washers the approach to it from both sides.

EFFECT: provided is higher payload and weight efficiency, improved transverse and longitudinal controllability, higher speed.

1 cl, 1 tbl, 1 dwg