FIELD: aviation; designs of helicopters.
SUBSTANCE: four-rotor oblong helicopter consists of a fuselage, a power unit with a gearbox, and two longitudinally located rotors. The power unit with a gearbox is located at the bottom of the fuselage. The bearing shaft from the gearbox passes through the fuselage to the hub of the two-rotor carrier system, which is mechanically connected to another two-rotor carrier system. Carrier systems are located above the fuselage. The tips of the blades of two-rotor bearing systems are mechanically connected in pairs - the upper one with the lower one. The blade turning rods of the upper and lower rotors are mechanically connected to a common swashplate.
EFFECT: lowering of the centre of gravity of the helicopter, exclusion of flutter and collision of the blades of two carrier systems.
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