HEAVY HIGH-SPEED ROTARY-WING AIRCRAFT Russian patent published in 2017 - IPC B64C27/22 B64C29/00 

FIELD: aircraft engineering.

SUBSTANCE: invention relates to aircraft engineering, particularly, to rotorcraft designes. Heavy high-speed rotary-wing aircraft (HHSRWA) has a fuselage, a tail unit with a horizontal stabilizer and a three-leg retractable wheeled landing gear. HHSRWA is configured as per the concept of diverse thrust of different-sized rotors (DTDSR) as a lifting-and-carrying system with four rotors and a lift-and-propulsion system with mutually opposite rotation of the pulling and the pushing coaxial smaller rotors installed in tandem in circular channels on V-shaped side all-rotary pylons. Rotation planes of blades of each pair of large rotors are located between different-span wings of the biplane-tandem system. On tips of the lower wings of reverse and straight sweep inside the rotor shafts there are hollow supports rigidly fixed with their lower ends to housings of the rotors reduction gears, and with the upper ones - in underwing fairings of the upper wings. HHSRWA has the possibility of the flight configuration conversion from a six-rotor helicopter into the flight configuration of a winged autogiro or a rotorcraft with a propulsion system consisting of smaller rotors.

EFFECT: provided is reduced power consumption for longitudinal balancing in hovering and better longitudinal controllability.

4 cl, 1 tbl, 2 dwg