GB1074873A - An adjustable pitch propeller - Google Patents

An adjustable pitch propeller

Info

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
Application number
GB36180/64A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cessna Aircraft Co
Original Assignee
Cessna Aircraft Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Cessna Aircraft Co filed Critical Cessna Aircraft Co
Publication of GB1074873A publication Critical patent/GB1074873A/en
Expired legal-status Critical Current

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.
GB36180/64A 1963-09-03 1964-09-03 An adjustable pitch propeller Expired GB1074873A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
US3167131A (en) 1965-01-26

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