RING PROPELLER WITH FORWARD SCREW

摘要

A ring propeller for a thruster includes a ring and a centre element. The ring propeller also includes at least one propeller blade extending between and attached to the centre element and the ring the at least one propeller blade comprises a leading edge profile and a trailing edge profile in a cross section perpendicular to an axis of rotation of the ring propeller.

主权项

1. A ring propeller for a thruster, the ring propeller comprising:
a ring; a centre element; and at least one propeller blade extending between and attached to the centre element and the ring, the at least one propeller blade comprises a leading edge profile and a trailing edge profile in a cross section perpendicular to an axis of rotation of the ring propeller, the at least one propeller blade being provided with forward skew, wherein the leading edge profile of the at least one propeller blade has an S-shape with a concave shape at a point of attachment to the ring such that a tangent to the leading edge profile at the point of attachment to an encompassing ring of the ring propeller and a tangent to the encompassing ring at the point of attachment form an angle greater than 0° and less than 90°.