GB1380252A - Helicopter rotor blades - Google Patents

Helicopter rotor blades

Info

Publication number
GB1380252A
GB1380252A GB284471A GB284471A GB1380252A GB 1380252 A GB1380252 A GB 1380252A GB 284471 A GB284471 A GB 284471A GB 284471 A GB284471 A GB 284471A GB 1380252 A GB1380252 A GB 1380252A
Authority
GB
United Kingdom
Prior art keywords
blade
link
fibres
helicopter rotor
reinforced plastics
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
GB284471A
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.)
UK Secretary of State for Defence
Original Assignee
UK Secretary of State for Defence
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 UK Secretary of State for Defence filed Critical UK Secretary of State for Defence
Priority to GB284471A priority Critical patent/GB1380252A/en
Publication of GB1380252A publication Critical patent/GB1380252A/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
    • B64C27/463—Blade tips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C27/00—Rotorcraft; Rotors peculiar thereto
    • B64C27/32—Rotors
    • B64C27/46—Blades
    • B64C27/467—Aerodynamic features

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

1380252 Helicopter rotor blades DEFENCE SECRETARY OF STATE FOR 21J an 1972 [21 Jan 1971] 2844/71 Heading B7W A helicopter rotor blade 1 is provided at its tip with a member 2 of aerofoil section which is hinged to the blade along an axis substantially chordwise of the blade, and has control means 9 to flap the member 2 in the opposite direction to the blade during rotation thereof. The blade 1 is provided with a forwardly protruding portion 3 to which the hinged portion member 2 is attached, and portion 3 and member 2 are provided with weights 4 and 5 respectively, at their forward extremities. Control of the setting of the member 2 is effected by means of a link 9 of carbon fibre reinforced plastics material extending spanwise from the member 2 to a second link 10 at the blade root, the link 9 being encapsulated in oil and supported on needle rollers. The link 10 is connected to a control (11), Fig. 2 (not shown), in the rotary hub. The member 2 is formed of silicon glass fibre roving reinforced plastics covered with a carbon fibre reinforced plastics skin, the carbon fibres being orientated to resist centrifugal stresses. The hinge (8), Fig. 4 (not shown), comprises a skin of plastics material reinforced with either silicon glass roving fibres or boron fibres. The blade is mounted at the root by means of a tube 6.
GB284471A 1971-01-21 1971-01-21 Helicopter rotor blades Expired GB1380252A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB284471A GB1380252A (en) 1971-01-21 1971-01-21 Helicopter rotor blades

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB284471A GB1380252A (en) 1971-01-21 1971-01-21 Helicopter rotor blades

Publications (1)

Publication Number Publication Date
GB1380252A true GB1380252A (en) 1975-01-08

Family

ID=9747037

Family Applications (1)

Application Number Title Priority Date Filing Date
GB284471A Expired GB1380252A (en) 1971-01-21 1971-01-21 Helicopter rotor blades

Country Status (1)

Country Link
GB (1) GB1380252A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2621982A1 (en) * 1975-05-19 1976-12-09 Westland Aircraft Ltd HELICOPTER ROTOR BLADE
US4685864A (en) * 1984-10-30 1987-08-11 Rolls-Royce Plc Hollow aerofoil blade
DE4215577A1 (en) * 1992-05-12 1993-11-18 Schubert Werner Aircraft or airship with improved stability in flight - has angled wings formed with wide downturned tips to create increased aerodynamic support
JPH10316098A (en) * 1997-05-15 1998-12-02 Fuji Heavy Ind Ltd Rotor blade of rotary-wing aircraft

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2621982A1 (en) * 1975-05-19 1976-12-09 Westland Aircraft Ltd HELICOPTER ROTOR BLADE
US4685864A (en) * 1984-10-30 1987-08-11 Rolls-Royce Plc Hollow aerofoil blade
DE4215577A1 (en) * 1992-05-12 1993-11-18 Schubert Werner Aircraft or airship with improved stability in flight - has angled wings formed with wide downturned tips to create increased aerodynamic support
JPH10316098A (en) * 1997-05-15 1998-12-02 Fuji Heavy Ind Ltd Rotor blade of rotary-wing aircraft

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Legal Events

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