GB1269327A - Helicopter rotor - Google Patents

Helicopter rotor

Info

Publication number
GB1269327A
GB1269327A GB8055/70A GB805570A GB1269327A GB 1269327 A GB1269327 A GB 1269327A GB 8055/70 A GB8055/70 A GB 8055/70A GB 805570 A GB805570 A GB 805570A GB 1269327 A GB1269327 A GB 1269327A
Authority
GB
United Kingdom
Prior art keywords
cup
ball
mast
rigidity
blades
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
GB8055/70A
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.)
Dornier GmbH
Original Assignee
Dornier GmbH
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 DE19691909501 external-priority patent/DE1909501C3/en
Application filed by Dornier GmbH filed Critical Dornier GmbH
Publication of GB1269327A publication Critical patent/GB1269327A/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/80—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with boron or compounds thereof, e.g. borides
    • D06M11/82—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with boron or compounds thereof, e.g. borides with boron oxides; with boric, meta- or perboric acids or their salts, e.g. with borax
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C27/00—Rotorcraft; Rotors peculiar thereto
    • B64C27/32—Rotors
    • B64C27/37—Rotors having articulated joints
    • B64C27/41—Rotors having articulated joints with flapping hinge or universal joint, common to the blades

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Toys (AREA)

Abstract

1,269,327. Helicopters. DORNIER G.m.b.H. 19 Feb., 1970 [26 Feb., 1969], No. 8055/70. Heading B7W. A helicopter rotor and mast assembly has rotor blades 5 attached to the cup 3 and a hollow mast 1 fixed to the ball 2 of a ball-andcup joint, and a bendable rod 8 supporting the cup 3 and non-rotatably mounted at a location 11 away from the cup. The mast 1 transmits power to the blades 5 through a synchronous joint 6 at any position of the cup 3 relative to the ball 2, and the blades 5 are attached to the cup by connections 4. Bearings 7 are provided between the cup 3 and bendable rod 8 and the latter is braced by a sleeve 9 and bearing 12. This sleeve 9, 12 slides within the mast 1 and is controlled by linkages 10 so that the rigidity of the ball and cup joint 2, 3 may be varied in accordance with flying conditions. In order that the phase angle in the plane of the rotor disc between cyclic control deflection and control moment should remain the same at all degrees of rigidity when a change in flapping, resistance is imposed part of a swash-plate attached to the fuselage may be rotated. Alternatively, by increasing rotor speed it is possible to maintain the phase angle constant when the control rigidity is changed.
GB8055/70A 1969-02-26 1970-02-19 Helicopter rotor Expired GB1269327A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691909501 DE1909501C3 (en) 1969-02-26 Rotor head for helicopters with semi-rigid rotor blade connection

Publications (1)

Publication Number Publication Date
GB1269327A true GB1269327A (en) 1972-04-06

Family

ID=5726303

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8055/70A Expired GB1269327A (en) 1969-02-26 1970-02-19 Helicopter rotor

Country Status (3)

Country Link
US (1) US3637322A (en)
FR (1) FR2032414B1 (en)
GB (1) GB1269327A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2450201A1 (en) * 1979-02-27 1980-09-26 Agusta Aeronaut Costr ROTOR SHAFT WITH INTERNAL CONTROLS FOR HELICOPTERS

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US7909579B2 (en) * 2007-08-29 2011-03-22 Cvc Technologies, Inc. Rotor head for a twin-rotor helicopter
US9567070B2 (en) * 2013-03-15 2017-02-14 Bell Helicopter Textron Inc. Tiltrotor control system with two rise/fall actuators
CN109774917B (en) * 2019-01-30 2024-04-16 南京航空航天大学 Miniature double-rotor aircraft

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB263599A (en) * 1925-11-26 1927-01-06 Jean Mellander Improvements in or relating to propellers for helicopterous aircrafts
FR888051A (en) * 1942-02-26 1943-12-02 Constructions Aeronautiques Sudest Orientable hub with its connecting member to an aviation device, the lift of which is provided by a rotary wing
GB608459A (en) * 1942-02-26 1948-09-15 Sncase Improvements in rotors for rotary-wing aircraft
FR929021A (en) * 1944-08-31 1947-12-15 Fairey Aviat Co Ltd Helicopter rotor
FR1044231A (en) * 1951-10-27 1953-11-16 Mechanical helicopter rotor oscillating hub
GB825446A (en) * 1955-10-31 1959-12-16 Aerotecnica S A Improvements in rotary wing aircraft
US3080002A (en) * 1961-06-29 1963-03-05 Doman Helicopters Inc Rotor with fixed pylon
US3451484A (en) * 1967-05-09 1969-06-24 Bell Aerospace Corp Focus rotor stabilization

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2450201A1 (en) * 1979-02-27 1980-09-26 Agusta Aeronaut Costr ROTOR SHAFT WITH INTERNAL CONTROLS FOR HELICOPTERS

Also Published As

Publication number Publication date
FR2032414A1 (en) 1970-11-27
US3637322A (en) 1972-01-25
DE1909501B2 (en) 1976-11-18
FR2032414B1 (en) 1974-03-15
DE1909501A1 (en) 1970-08-27

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