FIELD: transportation.
SUBSTANCE: invention relates to propulsors of vehicles, mainly of amphibious hovercrafts and planing crafts. The airscrew propeller nozzle comprises a pre-screw and a screw nozzles which are installed coaxially to form an annular channel. The pre-screw nozzle has a streamlined profile in the longitudinal section. The edges of the screw blades are located in the contraction of the screw nozzle. The front part of the screw nozzle is made in the form of a thin-walled shell which covers the pre-screw nozzle, protrudes beyond its front edge. The annular channel connects the gap between the contraction of the screw nozzle and the edges of the screw blades with the front edge of the pre-screw nozzle.
EFFECT: increased thrust of the airscrew and the propeller nozzle and reduced vibration and noise at the beginning of the vehicle's movement.
3 cl, 2 dwg
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