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GB909617A - Improvements in or relating to blades for rotary wing aircraft - Google Patents

Improvements in or relating to blades for rotary wing aircraft

Info

Publication number
GB909617A
GB909617A GB1078160A GB1078160A GB909617A GB 909617 A GB909617 A GB 909617A GB 1078160 A GB1078160 A GB 1078160A GB 1078160 A GB1078160 A GB 1078160A GB 909617 A GB909617 A GB 909617A
Authority
GB
United Kingdom
Prior art keywords
plates
spar
joint
bonded
outboard portion
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
GB1078160A
Inventor
Allan Henry Griffiths
Edward James Chubb
Christopher Cecil Aubr Slatter
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
Priority to GB1078160A priority Critical patent/GB909617A/en
Publication of GB909617A publication Critical patent/GB909617A/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
    • B64C27/46—Blades
    • B64C27/473—Constructional features
    • B64C27/48—Root attachment to rotor head

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Connection Of Plates (AREA)

Abstract

909,617. Rotor blades. WESTLAND AIRCRAFT Ltd. March 15, 1961 [March 26, 1960], No. 10781/60. Class 4. A metal rotor blade has an extruded hollow spar 1 forming the leading edge and having attached thereto a plurality of tapered pockets 17, Fig. 10, the airfoil outboard portion of the spar being of substantially uniform cross-section and the inboard portion having varying internal dimensions and thinner top and bottom walls than the outboard portion, the inboard portion having flat upper and lower surfaces and graduaally merging with the outboard portion. Root plates 5, 6 are bonded to the flat upper and lower surfaces; bolts 7, 8 holding the plates to the spar do not contact the plates, Fig. 3, so that load is transferred from the blade to the plates 5, 6 by the bonded joint, or should this joint fail then in shear by bolts 7, 8. The plates 5, 6 are spaced apart by two spacers 12, 13, 14, Fig. 2, and a diaphragm 15 and sealing strip 16 seal the inboard end of the spar. In the Provisional Specification it is stated that should the bonded joint between the plates and spar fail then the loads are taken by the joint in friction.
GB1078160A 1960-03-26 1960-03-26 Improvements in or relating to blades for rotary wing aircraft Expired GB909617A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1078160A GB909617A (en) 1960-03-26 1960-03-26 Improvements in or relating to blades for rotary wing aircraft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1078160A GB909617A (en) 1960-03-26 1960-03-26 Improvements in or relating to blades for rotary wing aircraft

Publications (1)

Publication Number Publication Date
GB909617A true GB909617A (en) 1962-10-31

Family

ID=9974146

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1078160A Expired GB909617A (en) 1960-03-26 1960-03-26 Improvements in or relating to blades for rotary wing aircraft

Country Status (1)

Country Link
GB (1) GB909617A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4083656A (en) * 1975-03-21 1978-04-11 Textron, Inc. Composite rotor blade
US4525911A (en) * 1983-04-22 1985-07-02 Flowind R & D Partnership Method and apparatus for attaching blades to rotating structures
US5074753A (en) * 1989-10-16 1991-12-24 Bell Helicopter Textron Inc. Rotor blade
US5868351A (en) * 1996-05-23 1999-02-09 Bell Helicopter Textron Inc. Rotor blade stowing system
FR2898581A1 (en) * 2006-03-15 2007-09-21 Eurocopter France BLADE COMPRISING AN INTEGRATED CUFF AND ROTOR OF GIRAVION PROVIDED WITH SUCH A BLADE.
EP2457830A1 (en) * 2010-11-25 2012-05-30 Eurocopter Deutschland GmbH Blade to rotor hub joint
GB2494389B (en) * 2011-09-01 2015-02-18 Aviat Entpr Ltd Rotor blade
US9718542B2 (en) 2012-04-18 2017-08-01 Airbus Helicopters Deutschland GmbH Blade attachment for a bearingless rotor of a helicopter
EP3246248A1 (en) * 2016-05-16 2017-11-22 Bell Helicopter Textron Inc. Folding proprotor blade assembly having integral tang assembly

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4083656A (en) * 1975-03-21 1978-04-11 Textron, Inc. Composite rotor blade
US4525911A (en) * 1983-04-22 1985-07-02 Flowind R & D Partnership Method and apparatus for attaching blades to rotating structures
US5074753A (en) * 1989-10-16 1991-12-24 Bell Helicopter Textron Inc. Rotor blade
US5868351A (en) * 1996-05-23 1999-02-09 Bell Helicopter Textron Inc. Rotor blade stowing system
FR2898581A1 (en) * 2006-03-15 2007-09-21 Eurocopter France BLADE COMPRISING AN INTEGRATED CUFF AND ROTOR OF GIRAVION PROVIDED WITH SUCH A BLADE.
US7811061B2 (en) 2006-03-15 2010-10-12 Eurocopter Blade having an integral cuff, and a rotorcraft rotor provided with such a blade
EP2457830A1 (en) * 2010-11-25 2012-05-30 Eurocopter Deutschland GmbH Blade to rotor hub joint
US8985958B2 (en) 2010-11-25 2015-03-24 Airbus Helicopters Deutschland GmbH Connection means
GB2494389B (en) * 2011-09-01 2015-02-18 Aviat Entpr Ltd Rotor blade
US9718542B2 (en) 2012-04-18 2017-08-01 Airbus Helicopters Deutschland GmbH Blade attachment for a bearingless rotor of a helicopter
EP3246248A1 (en) * 2016-05-16 2017-11-22 Bell Helicopter Textron Inc. Folding proprotor blade assembly having integral tang assembly
US9981736B2 (en) 2016-05-16 2018-05-29 Bell Helicopter Textron Inc. Folding proprotor blade assembly having integral tang assembly

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