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GB2012698A - Composite aerofoils - Google Patents

Composite aerofoils

Info

Publication number
GB2012698A
GB2012698A GB7849141A GB7849141A GB2012698A GB 2012698 A GB2012698 A GB 2012698A GB 7849141 A GB7849141 A GB 7849141A GB 7849141 A GB7849141 A GB 7849141A GB 2012698 A GB2012698 A GB 2012698A
Authority
GB
United Kingdom
Prior art keywords
aerofoils
twist
load
composite
spanwise direction
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.)
Granted
Application number
GB7849141A
Other versions
GB2012698B (en
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.)
SECR DEFENCE
UK Secretary of State for Defence
Original Assignee
SECR DEFENCE
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 SECR DEFENCE, UK Secretary of State for Defence filed Critical SECR DEFENCE
Priority to GB7849141A priority Critical patent/GB2012698B/en
Publication of GB2012698A publication Critical patent/GB2012698A/en
Application granted granted Critical
Publication of GB2012698B publication Critical patent/GB2012698B/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C3/00—Wings
    • 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
    • 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
    • B64C2027/4733—Rotor blades substantially made from particular materials
    • B64C2027/4736—Rotor blades substantially made from particular materials from composite materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/10—Drag reduction

Landscapes

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

Abstract

The invention relates to aerofoils, particularly helicopter rotor blades, and is concerned with alleviating vibration and other problems occurring as a result of varying load. Accordingly, an aerofoil has a tip section 14 formed at least in part of composite structure wherein a substantial number of fibres are skew to the spanwise direction resulting in the direction of principal bending stiffness being diverted away from the spanwise direction. Twist is thereby induced under certain loading conditions, the degree of twist varies with load and is arranged for example to alleviate vibration. <IMAGE>
GB7849141A 1978-01-03 1978-12-19 Aerofoils Expired GB2012698B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7849141A GB2012698B (en) 1978-01-03 1978-12-19 Aerofoils

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9778 1978-01-03
GB7849141A GB2012698B (en) 1978-01-03 1978-12-19 Aerofoils

Publications (2)

Publication Number Publication Date
GB2012698A true GB2012698A (en) 1979-08-01
GB2012698B GB2012698B (en) 1982-02-10

Family

ID=26235687

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7849141A Expired GB2012698B (en) 1978-01-03 1978-12-19 Aerofoils

Country Status (1)

Country Link
GB (1) GB2012698B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3531721A1 (en) * 1984-09-19 1986-03-27 United Technologies Corp., Hartford, Conn. FIBER REINFORCED RESIN MATRIX COMPOSITE OBJECT
US5730581A (en) * 1995-08-02 1998-03-24 Deutsche Forschungsanstalt Fur Luft-Und Raumfahrt E.V. Rotor blade
WO2003078833A1 (en) * 2002-03-19 2003-09-25 Lm Glasfiber A/S Wind turbine blade with carbon fibre tip
US7364407B2 (en) 2002-03-19 2008-04-29 Lm Glasfiber A/S Transition zone in wind turbine blade

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3531721A1 (en) * 1984-09-19 1986-03-27 United Technologies Corp., Hartford, Conn. FIBER REINFORCED RESIN MATRIX COMPOSITE OBJECT
US5730581A (en) * 1995-08-02 1998-03-24 Deutsche Forschungsanstalt Fur Luft-Und Raumfahrt E.V. Rotor blade
WO2003078833A1 (en) * 2002-03-19 2003-09-25 Lm Glasfiber A/S Wind turbine blade with carbon fibre tip
CN100376790C (en) * 2002-03-19 2008-03-26 Lm玻璃纤维制品有限公司 Wind turbine blade with carbon fibre tip
US7364407B2 (en) 2002-03-19 2008-04-29 Lm Glasfiber A/S Transition zone in wind turbine blade
AU2003218632B2 (en) * 2002-03-19 2009-01-08 Lm Glasfiber A/S Wind turbine blade with carbon fibre tip

Also Published As

Publication number Publication date
GB2012698B (en) 1982-02-10

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Legal Events

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