GB608459A - Improvements in rotors for rotary-wing aircraft - Google Patents

Improvements in rotors for rotary-wing aircraft

Info

Publication number
GB608459A
GB608459A GB5755/46A GB575546A GB608459A GB 608459 A GB608459 A GB 608459A GB 5755/46 A GB5755/46 A GB 5755/46A GB 575546 A GB575546 A GB 575546A GB 608459 A GB608459 A GB 608459A
Authority
GB
United Kingdom
Prior art keywords
ball joint
rotor
hub
forces
feb
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
GB5755/46A
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.)
Societe Nationale des Constructions Aeronautiques du Sud Est SNCASE
Original Assignee
Societe Nationale des Constructions Aeronautiques du Sud Est SNCASE
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 Societe Nationale des Constructions Aeronautiques du Sud Est SNCASE filed Critical Societe Nationale des Constructions Aeronautiques du Sud Est SNCASE
Publication of GB608459A publication Critical patent/GB608459A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C27/00—Rotorcraft; Rotors peculiar thereto
    • B64C27/02—Gyroplanes
    • B64C27/021—Rotor or rotor head construction
    • B64C27/024—Devices for shifting the rotor axis

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Vibration Dampers (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

608,459. Helicopters. SOC. NATIONALE DE CONSTRUCTIONS AERONAUTIQUES DU SUD-EST. Feb. 25, 1946, No. 5755. Convention date, Feb. 26, 1942. [Class 4] The hub of a helicopter rotor is connected to the fuselage by a ball joint and a flexible connection permitting tilting of the rotor, the flexible connection transmitting the sustaining forces while the ball joint transmits only the lateral forces. In the construction shown in Fig. 1, the hub 4 rotates on a sleeve 5 mounted by a ball joint 7, 8 on a member 8a integral with the aircraft structure. The flexible tie member 10 is secured at its upper end to a ring 11 and at its lower end to the member 8a. Tilting of the rotor is effected by control rods 6. Fig. 3 shows a construction in which Belleville washers 12 between the ring 11 and the hub serve to damp vibrations. In the construction according to Fig. 4, a conical spring 14 is mounted between the ball joint and a collar at the end of the member 8a. The spring is compressed by the lift forces and is capable of undergoing deformation when the rotor is tilted.
GB5755/46A 1942-02-26 1946-02-25 Improvements in rotors for rotary-wing aircraft Expired GB608459A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR608459X 1942-02-26

Publications (1)

Publication Number Publication Date
GB608459A true GB608459A (en) 1948-09-15

Family

ID=8976074

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5755/46A Expired GB608459A (en) 1942-02-26 1946-02-25 Improvements in rotors for rotary-wing aircraft

Country Status (1)

Country Link
GB (1) GB608459A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE962854C (en) * 1955-10-16 1957-04-25 Franz Hartmann Rotor blade control in helicopters by eddy current brakes
US2949254A (en) * 1955-04-29 1960-08-16 Bauer Richard Helicopter structures
US3637322A (en) * 1969-02-26 1972-01-25 Dornier Ag Rotor head for a helicopter
US3771923A (en) * 1970-11-13 1973-11-13 R Demontaigu Autogyros, especially permitting the use of these devices as economical airground vehicles
US4477224A (en) * 1981-09-18 1984-10-16 Westland Plc Helicopter rotor
US4778340A (en) * 1985-11-25 1988-10-18 Costruzioni Aeronautiche Giovanni Augusta S.P.A. Main helicopter rotor
US4877375A (en) * 1986-09-30 1989-10-31 The Boeing Company Drive shaft and rotor hub for helicopter flexible rotor system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2949254A (en) * 1955-04-29 1960-08-16 Bauer Richard Helicopter structures
DE962854C (en) * 1955-10-16 1957-04-25 Franz Hartmann Rotor blade control in helicopters by eddy current brakes
US3637322A (en) * 1969-02-26 1972-01-25 Dornier Ag Rotor head for a helicopter
US3771923A (en) * 1970-11-13 1973-11-13 R Demontaigu Autogyros, especially permitting the use of these devices as economical airground vehicles
US4477224A (en) * 1981-09-18 1984-10-16 Westland Plc Helicopter rotor
US4778340A (en) * 1985-11-25 1988-10-18 Costruzioni Aeronautiche Giovanni Augusta S.P.A. Main helicopter rotor
US4877375A (en) * 1986-09-30 1989-10-31 The Boeing Company Drive shaft and rotor hub for helicopter flexible rotor system

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