Ab Volvo Penta

Volvo Penta Corporation

Oddbjörn Hallenstvedt

Lennart Arvidsson

Jukka Tuuliainen

Kåre Jonsson

A propeller () for a marine vessel (), the propeller () comprising a plurality of propeller blades (). The propeller blades comprise a leading edge (), a trailing edge () and an outer edge () located between the leading edge and the trailing edge. A transition from the leading edge to the outer edge occurs at a first transition point () and a transition from the outer edge to the trailing edge occurs at a second transition point (). A straight line from the first transition point to the second transition point coincides with the outer edge () or is located at least partially outside the propeller blade. A smallest distance (D) from the second transition point to the axis of rotation (A) is smaller than a smallest distance (D) from the first transition point to the axis of rotation.

Propeller for a marine vessel

A method of steering a planning V-bottomed boat with double individually steerable outboard drive units with underwater housings (), which extend down from the bottom () of the boat. When running at planning speed straight ahead, the underwater housings are set with 'toe-in', i.e. inclined towards each other with opposite angles (alpha) of equal magnitude relative to the boat centre line (b). When turning, the inner drive unit is set with a greater steering angle than the outer drive unit.

Growing community of inventors

Valskog, Sweden

Oddbjörn Hallenstvedt