FIELD: transport.
SUBSTANCE: invention relates to aircraft engineering, particularly to design of helicopters. Helicopter tail comprises fan-in-fin rotor with propeller (4) with blades (3) and, if required, the vertical fins (1.2). Flow-straightening fixed blades stators (5) are star-configured parallel with the propeller plane and upstream of the propeller (4). Fan-in-fin rotor ring (2.1) is enclosed in comprises stricture composed of external erosion-proof surface ply (7.1, 8.1) made of hard plastic of plastic composite and at least one next ply (7.2, 8.2) of elastomer damping material. Fan-in-fin rotor ring comprises alternating two plies of hard plastic and two plies of said elastomer damping material.
EFFECT: lower noise of tail assembly.
10 cl, 9 dwg
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