Patent ID: 11858606
Assignee: SAAB AB
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 12:
13. A data medium storing a data program (P) configured for manoeuvring a watercraft vehicle (1) according to claim 1, wherein said data program (P) comprises a non-transitory program code stored on the data medium, which is readable on a computer, for causing the control circuitry (5) to perform the steps of:
rotating the propeller shaft (9) about the axis of rotation (RX) forming the propeller disc (11);
changing the rotational velocity for achieving said rate of change of rotational velocity in said first arc segment (13′) for providing a first propeller blade pitch change about the first oblique axis (21′) and for achieving said rate of change of rotational velocity in said second arc segment (13″) for providing a second propeller blade pitch change about the second oblique axis (21″);
increasing the angle of attack of the first propeller blade (8) by said first propeller blade pitch change generating larger thrust of the first propeller blade (8) in the first arc segment (13′);
decreasing the angle of attack of the second propeller blade (10) by said second propeller blade pitch change generating smaller thrust of the second propeller blade (10) in the second arc segment (13″), and
providing constant rate of rotation of the propeller shaft (9) for generating linear thrust.