FIELD: transportation.
SUBSTANCE: stern cruciform control surfaces of submersible craft include horizontal and vertical stabilisers, which have bow fixed and stern movable parts. A semi-ring is installed on fixed bow parts of horizontal and upper vertical stabilisers. Semi-ring has a wing-shaped section with alternating lengths of chords and setting angles of sections along perimeter of semi-ring. Besides setting angles are selected in compliance with local angles of approach flow attack. Radius of semi-ring corresponds to 1.2-1.3 of submersible craft body in area of semi-ring installation. Semi-ring is arranged as metal, hollow and cast-welded. Cavity of semi-ring is filled with composite material. Semi-ring may be made of two parts joined by fixtures, between which a vibration-absorbing film is placed.
EFFECT: reduced noise emission and level of cavitation and vibroacoustic characteristics of stern control surfaces and the submersible craft itself.
3 cl, 4 dwg
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