IT1138938B - AUTOMATIC POSITIONING AND LOCKING SYSTEM FOR FOLDING BLADES OF A HELICOPTER - Google Patents

AUTOMATIC POSITIONING AND LOCKING SYSTEM FOR FOLDING BLADES OF A HELICOPTER

Info

Publication number
IT1138938B
IT1138938B IT24415/81A IT2441581A IT1138938B IT 1138938 B IT1138938 B IT 1138938B IT 24415/81 A IT24415/81 A IT 24415/81A IT 2441581 A IT2441581 A IT 2441581A IT 1138938 B IT1138938 B IT 1138938B
Authority
IT
Italy
Prior art keywords
helicopter
locking system
automatic positioning
folding blades
blades
Prior art date
Application number
IT24415/81A
Other languages
Italian (it)
Other versions
IT8124415A0 (en
Inventor
Alexander Maclennan Roderick
Joseph Mulvey William
Wayne Fowler Donald
Charles Arifian Kenneth
Original Assignee
United Technologies Corp
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
Priority claimed from US06/195,723 external-priority patent/US4376979A/en
Priority claimed from US06/195,808 external-priority patent/US4354234A/en
Application filed by United Technologies Corp filed Critical United Technologies Corp
Publication of IT8124415A0 publication Critical patent/IT8124415A0/en
Application granted granted Critical
Publication of IT1138938B publication Critical patent/IT1138938B/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C27/00—Rotorcraft; Rotors peculiar thereto
    • B64C27/54—Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C27/00—Rotorcraft; Rotors peculiar thereto
    • B64C27/32—Rotors
    • B64C27/46—Blades
    • B64C27/473—Constructional features
    • B64C27/50—Blades foldable to facilitate stowage of aircraft

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Toys (AREA)
  • Transmission Devices (AREA)
IT24415/81A 1980-10-10 1981-10-09 AUTOMATIC POSITIONING AND LOCKING SYSTEM FOR FOLDING BLADES OF A HELICOPTER IT1138938B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/195,723 US4376979A (en) 1980-10-10 1980-10-10 Updated lock-positioning of foldable helicopter blades
US06/195,808 US4354234A (en) 1980-10-10 1980-10-10 Automatic lock-positioning of foldable helicopter blades

Publications (2)

Publication Number Publication Date
IT8124415A0 IT8124415A0 (en) 1981-10-09
IT1138938B true IT1138938B (en) 1986-09-17

Family

ID=26891271

Family Applications (1)

Application Number Title Priority Date Filing Date
IT24415/81A IT1138938B (en) 1980-10-10 1981-10-09 AUTOMATIC POSITIONING AND LOCKING SYSTEM FOR FOLDING BLADES OF A HELICOPTER

Country Status (8)

Country Link
AU (1) AU540743B2 (en)
CA (1) CA1161413A (en)
CH (1) CH652673A5 (en)
DE (1) DE3139720C2 (en)
ES (1) ES506143A0 (en)
FR (1) FR2491865A1 (en)
GB (1) GB2085194B (en)
IT (1) IT1138938B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4696445A (en) * 1986-09-18 1987-09-29 United Technologies Corporation Collective control system for a helicopter
AU587363B1 (en) * 1988-07-27 1989-08-10 Richard Henry Tollervey Improvements to helicopter rotor blades
FR2754779B1 (en) * 1996-10-22 1998-12-31 Eurocopter France METHOD FOR FOLDING THE BLADES OF A MAIN ROTOR OF A GIRAVION AND DEVICE FOR IMPLEMENTING SAME
FR2931132B1 (en) 2008-05-19 2010-04-23 Eurocopter France ASSISTED CONTROL SYSTEM OF A GIRAVON
US9682771B2 (en) 2013-08-14 2017-06-20 Sikorsky Aircraft Corporation Controlling rotor blades of a swashplateless rotor
CN114692291B (en) * 2021-12-29 2024-09-06 中国航空工业集团公司西安飞机设计研究所 Longitudinal aerodynamic balancing method of propeller aircraft considering gravity center influence
CN114465065B (en) * 2022-01-06 2023-11-03 广东汇天航空航天科技有限公司 Aircraft main shaft slip ring device, aircraft rotor system and aircraft
CN114802739B (en) * 2022-06-09 2023-04-07 广东汇天航空航天科技有限公司 Rotor positioning method for aircraft, aircraft and storage medium

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3698662A (en) * 1970-10-12 1972-10-17 Lockheed Aircraft Corp Apparatus and method for sequencing the folding and unfolding of rotor blades in a compound vehicle
US4103848A (en) * 1977-03-08 1978-08-01 United Technologies Corporation Variable incidence helicopter stabilator and fail safe actuator
US4284387A (en) * 1979-05-02 1981-08-18 United Technologies Corp. Blade fold restraint system

Also Published As

Publication number Publication date
IT8124415A0 (en) 1981-10-09
GB2085194A (en) 1982-04-21
ES8206331A1 (en) 1982-08-16
AU7622781A (en) 1982-04-22
AU540743B2 (en) 1984-11-29
FR2491865A1 (en) 1982-04-16
DE3139720A1 (en) 1982-05-19
GB2085194B (en) 1984-03-07
FR2491865B1 (en) 1983-12-23
DE3139720C2 (en) 1994-02-10
ES506143A0 (en) 1982-08-16
CH652673A5 (en) 1985-11-29
CA1161413A (en) 1984-01-31

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Effective date: 19950929