FIELD: transport.
SUBSTANCE: invention relates to ship building and pertains to noiseless screw propellers. Screw propeller, driven by engine, comprises hub and multiple blades extending beyond the hub, each having first side edge and second side edge, first blade inclination angle relative to line F running along blade perpendicular to screw axis and making 0-4 degrees. Note that first side edge gradually becomes a bit thinner in direction from the hub to blade end. In compliance with second version, blade has diagonal line formed by intersection of first side edge with bending line, while inclined rear surface rises to diagonal line to second side edge.
EFFECT: no cavitation at high screw rpm.
6 cl, 26 dwg
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