Volvo Penta Corporation

Johan Tell

Lars Wik

Lars Johansson

A marine propeller combination for a marine propulsion unit includes a first propeller and a second propeller arranged to rotate simultaneously in opposite directions about a common rotational axis. The marine propeller combination is configured such that the first and second propellers are angularly positioned such that during one revolution one of the blades of the first propeller is aligned with a drive leg of the marine propulsion unit when a blade gap of the second propeller is aligned with the drive leg, or one of the blades of the first propeller is aligned with the drive leg when one of the blades of the second propeller is aligned with the drive leg. The disclosure further relates to a marine vessel and to a method of operating a marine propeller combination.

Angularly positioned marine propeller combination and a method of operating a marine propeller combination

A computer-implemented method for maneuvering a boat provided with a single drive unit, includes: Obtaining net momentum direction data indicative of a target horizontal rotational movement of the hull, triggering a series of bursts of thrust by the drive unit, said series of bursts of thrust comprising a plurality of primary bursts and a plurality of secondary bursts directed differently than the primary bursts, The primary bursts and the secondary bursts are directed such that they provide a respective longitudinal thrust component parallel to a hull longitudinal axis. The primary bursts are directed such that the longitudinal thrust components of the primary bursts act in the opposite direction with respect to the direction of the longitudinal thrust components of the secondary bursts. The primary bursts and the secondary bursts are further directed such that they jointly provide a net momentum on the hull associated with said net momentum direction data.

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Gothenburg, Sweden

Johan Tell