GB1074873A - An adjustable pitch propeller - Google Patents
An adjustable pitch propellerInfo
- Publication number
- GB1074873A GB1074873A GB36180/64A GB3618064A GB1074873A GB 1074873 A GB1074873 A GB 1074873A GB 36180/64 A GB36180/64 A GB 36180/64A GB 3618064 A GB3618064 A GB 3618064A GB 1074873 A GB1074873 A GB 1074873A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piston
- springs
- latches
- flanges
- engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
- B64C11/30—Blade pitch-changing mechanisms
- B64C11/38—Blade pitch-changing mechanisms fluid, e.g. hydraulic
- B64C11/385—Blade pitch-changing mechanisms fluid, e.g. hydraulic comprising feathering, braking or stopping systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
- B64C11/30—Blade pitch-changing mechanisms
- B64C11/32—Blade pitch-changing mechanisms mechanical
- B64C11/325—Blade pitch-changing mechanisms mechanical comprising feathering, braking or stopping systems
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
- Actuator (AREA)
Abstract
1,074,873. Feathering propellers. CESSNA AIRCRAFT CO. Sept. 3, 1964 [Sept. 3, 1963], No. 36180/64. Heading B7V. [Also in Divisions E2 and F1] An aircraft propeller has blades 15 mounted in a hub 10 and rotatable about their pitch axes by a piston 22 through connecting-rods 28. The piston is biased to the feathered position against a stop 33 by springs 35 and the centrifugal force on a counterweight 16 and is moved towards the fine pitch position, against flanges (31, Fig. 2, not shown) by hydraulic pressure from a pump 40 (which is driven by the propeller, engine, or otherwise) transmitted through a valve 45, controlled by a governor 44 which gives a high pressure when the engine is running slowly, and lever 47, then through the propeller shaft 12 and a hollow piston-rod 23, 26. According to the invention, when the engine is stopped the piston 22 is returned to the fine pitch position by the reduction in the force on the weight 16 and by movement of the valve 45, e.g. by the governor; and held near there to facilitate restarting by latches (50, Fig. 2, not shown) on the piston 22 arranged to engage the flanges (31). A supplementary piston (60) is fitted within the piston 22 and is urged to the left by springs (61) and to the right by hydraulic pressure transmitted through an orifice (56) in the piston 22. When subjected to hydraulic pressure the latches are held out of engagement with the flanges (31) by another flange (72) on the supplementary piston (60). The springs (61) are stronger than the springs 35, relative to the respective areas of their pistons, and so, as the pressure falls, the piston (60) is first urged to the left by the springs (61) until ramps (66, 67) on the piston (60) and latches (50) engage when the latches are pivoted into engagement with the flanges 31.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US305963A US3167131A (en) | 1963-09-03 | 1963-09-03 | Controllable pitch propeller having low pitch stop |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1074873A true GB1074873A (en) | 1967-07-05 |
Family
ID=23183133
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB36180/64A Expired GB1074873A (en) | 1963-09-03 | 1964-09-03 | An adjustable pitch propeller |
Country Status (2)
Country | Link |
---|---|
US (1) | US3167131A (en) |
GB (1) | GB1074873A (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3380535A (en) * | 1965-12-27 | 1968-04-30 | Hartzell Propeller Inc | Constant speed and reversible aircraft propeller |
US4037986A (en) * | 1975-09-04 | 1977-07-26 | Dowty Rotol Limited | Bladed rotors having control means for effecting blade pitch adjustment |
US4097189A (en) * | 1976-09-20 | 1978-06-27 | Hartzell Propeller, Inc. | Aircraft propeller and blade pitch control system |
US4648798A (en) * | 1985-05-01 | 1987-03-10 | The Cessna Aircraft Company | Controllable pitch aircraft propeller |
US5102302A (en) * | 1988-06-02 | 1992-04-07 | General Electric Company | Fan blade mount |
US5165856A (en) * | 1988-06-02 | 1992-11-24 | General Electric Company | Fan blade mount |
US4909709A (en) * | 1988-06-22 | 1990-03-20 | Raisbeck James D | Throttle/propeller mixer cam |
US4904157A (en) * | 1988-11-21 | 1990-02-27 | Hartzell Propeller Inc. | Aircraft propeller assembly with blade pitch reset for ground idle |
US5061153A (en) * | 1988-11-21 | 1991-10-29 | Hartzell Propeller Inc. | Aircraft propeller assembly with blade pitch reset for ground idle |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2368950A (en) * | 1937-11-11 | 1945-02-06 | Dehavilland Aircraft | Variable pitch airscrew |
US2974729A (en) * | 1958-07-30 | 1961-03-14 | Mccauley Ind Corp | Controllable pitch propeller |
-
1963
- 1963-09-03 US US305963A patent/US3167131A/en not_active Expired - Lifetime
-
1964
- 1964-09-03 GB GB36180/64A patent/GB1074873A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3167131A (en) | 1965-01-26 |
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