A propeller shaft (1, Fig 1) is rotatable about a longitudinal axis 1A and a hub (2, Fig 1) is mounted on the propeller shaft with propeller blades 4 projecting radially from the hub. Each propeller blade has a blade base 7 which includes a drum 9. A ring bearing 8 mounts the blade base to the hub such that the propeller blade is rotatable about a radial axis (4A, Fig 3). A cable or other flexible drive element 13 is looped around each drum and attached thereto by a bolt 14. Opposite ends (13a, 13b, Fig 3) of the cable are attached to opposite ends of a pitch change rod 12 which extends transverse to the radial axis. In one embodiment a control member 11 may extend within the propeller shaft to reciprocally move the pitch change rods and thereby change the pitch angle of the propeller blades. In another embodiment the pitch change rods may be moved by a hydraulic cylinder within the propeller hub.
Controllable pitch propeller
2022-06-01
Patent
Elektronische Ressource
Englisch
Engineering Index Backfile | 1940
|Engineering Index Backfile | 1931
|Engineering Index Backfile | 1940
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