An adjustable pitch propeller comprises a drive shaft 2, hub (1 fig 1) and blades 3. Each blade includes a fixed pitch portion (4 fig 1) fixed relative to the hub and a pitch change flap 7 pivotable about a pitch change axis (14 fig 5) extending along a trailing edge (6 fig 1) of each blade. A pitch change mechanism on the hub adjusts the angle of the flap. The flap may be supported by a pivot pin 16, which may carry a pitch change arm (18 fig 5). The arm may be engaged with a control head 20 movable axially of the drive shaft. The control head may be movable by a compression spring 26 located in a chamber. The spring may act between the control head and an end wall 27 of the chamber. A screw thread adjuster may engage with the control head to vary the spring. The control head may be movable remotely by a rod (30 fig 10), cable or hydraulic fluid passing inside the drive shaft. An outer end of each blade may carry a tip plate (15 fig 3).
Adjustable pitch propeller
2017-12-06
Patent
Electronic Resource
English
Engineering Index Backfile | 1930
Adjustable reversible pitch propeller
Engineering Index Backfile | 1930