FIELD: aviation.
SUBSTANCE: invention relates to aircraft engineering, particularly, to designs of convertible rotorcraft. Aircraft comprises fuselage and two wings with rotary engine nacelles fitted on ends of said wings and pulling and/or pushing propellers. At the same time engine groups in the first two engine nacelles located diagonally relative to each other are made with power higher than in the second two engine nacelles.
EFFECT: most rational mode of aircraft operation is ensured, the efficiency and performance factor, service life and resource of mechanisms are increased.
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