GB1310035A - Semi-rigid rotor systems for rotary wing aircraft - Google Patents

Semi-rigid rotor systems for rotary wing aircraft

Info

Publication number
GB1310035A
GB1310035A GB1310035DA GB1310035A GB 1310035 A GB1310035 A GB 1310035A GB 1310035D A GB1310035D A GB 1310035DA GB 1310035 A GB1310035 A GB 1310035A
Authority
GB
United Kingdom
Prior art keywords
flexure
members
hinge
flexure members
semi
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
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.)
Westland Group PLC
Original Assignee
Westland Aircraft Ltd
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 Westland Aircraft Ltd filed Critical Westland Aircraft Ltd
Publication of GB1310035A publication Critical patent/GB1310035A/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
    • B64C27/32—Rotors
    • B64C27/33—Rotors having flexing arms

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Toys (AREA)
  • Wind Motors (AREA)

Abstract

1310035 Helicopter rotors WESTLAND AIRCRAFT Ltd 8 Oct 1971 [15 Oct 1970] 49006/70 Heading B7W A helicopter rotor assembly comprises a rotor hub having a plurality of first flexure members 12 extending therefrom, each flexure member being joined to a second flexure member 13 by a feathering hinge 14, each second flexure member being adapted to be connected to a blade 18. The first flexure members 12 are formed integrally with the rotor hub from titanium, each have a cross-section which is horizontally elongate at the root tapering to a circular crosssection near the hinge, and are each formed with an extension forming an inner cylindrical bearing casing for the respective hinge 14, the corresponding inner ends of the second flexure members 13 being each formed with an extension forming an outer cylindrical bearing casing for the respective hinge 14. The oblate crosssectioned parts of the first flexure members allows flapping movement of the blades and the second flexure members 13 and circular crosssectional parts of the first members 12 allowing both lead-lag and flapping motion of the blades.
GB1310035D 1970-10-15 1970-10-15 Semi-rigid rotor systems for rotary wing aircraft Expired GB1310035A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4900670 1970-10-15

Publications (1)

Publication Number Publication Date
GB1310035A true GB1310035A (en) 1973-03-14

Family

ID=10450776

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1310035D Expired GB1310035A (en) 1970-10-15 1970-10-15 Semi-rigid rotor systems for rotary wing aircraft

Country Status (5)

Country Link
CA (1) CA952888A (en)
DE (1) DE2150761C3 (en)
FR (1) FR2110441B1 (en)
GB (1) GB1310035A (en)
IT (1) IT939542B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2358316A1 (en) * 1976-07-15 1978-02-10 Westland Aircraft Ltd HELICOPTER ROTOR
DE102006042575A1 (en) * 2006-09-11 2008-03-27 Matthias Rupprecht Rotor head unit for helicopter or surface airplane, has blade holders and bearing unit movably arranged to each other, where movability between bearing unit and blade holders is enabled totally or partially by solid joints

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1535391A (en) * 1976-05-11 1978-12-13 Westland Aircraft Ltd Helicopter rotors

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2949967A (en) * 1959-05-25 1960-08-23 Hughes Tool Co Blade-to-hub connector for thrust producing rotor
US3026942A (en) * 1959-07-07 1962-03-27 Bell Helicopter Corp Helicopter rotor system
US3384185A (en) * 1967-06-02 1968-05-21 Aerojet General Co Rotor hubs
US3926536A (en) * 1970-10-15 1975-12-16 Westland Aircraft Ltd Semi-rigid rotor systems for rotary wing aircraft

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2358316A1 (en) * 1976-07-15 1978-02-10 Westland Aircraft Ltd HELICOPTER ROTOR
DE102006042575A1 (en) * 2006-09-11 2008-03-27 Matthias Rupprecht Rotor head unit for helicopter or surface airplane, has blade holders and bearing unit movably arranged to each other, where movability between bearing unit and blade holders is enabled totally or partially by solid joints

Also Published As

Publication number Publication date
IT939542B (en) 1973-02-10
DE2150761C3 (en) 1985-05-15
DE2150761B2 (en) 1976-03-11
CA952888A (en) 1974-08-13
FR2110441A1 (en) 1972-06-02
DE2150761A1 (en) 1972-06-15
FR2110441B1 (en) 1976-02-13

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee