FR2397328A1 - Pales et rotors d'helicopteres ameliores - Google Patents

Pales et rotors d'helicopteres ameliores

Info

Publication number
FR2397328A1
FR2397328A1 FR7820802A FR7820802A FR2397328A1 FR 2397328 A1 FR2397328 A1 FR 2397328A1 FR 7820802 A FR7820802 A FR 7820802A FR 7820802 A FR7820802 A FR 7820802A FR 2397328 A1 FR2397328 A1 FR 2397328A1
Authority
FR
France
Prior art keywords
blade
rotors
rotor
aerodynamic
helicopter 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.)
Granted
Application number
FR7820802A
Other languages
English (en)
Other versions
FR2397328B1 (fr
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.)
RTX Corp
Original Assignee
United Technologies Corp
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 United Technologies Corp filed Critical United Technologies Corp
Publication of FR2397328A1 publication Critical patent/FR2397328A1/fr
Application granted granted Critical
Publication of FR2397328B1 publication Critical patent/FR2397328B1/fr
Granted 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)
  • Wind Motors (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

La pale d'hélicoptère est souple par torsion et à son axe du centre aérodynamique positionné sélectivement à l'avant de son centre de gravité et de ses axes élastiques sur une partie sélectionnée entière de sa portée, de façon qu'au cours du fonctionnement, la pale subisse une charge d'air qui entraîne sa déformation par torsion de deux cycles par révolution pour améliorer ainsi le rendement du rotor en réduisant la puissance totale requise pour entraîna ce rotor. On agit au moyen de la charge aérodynamique de la pale et non par l'apport de matériel additionnel.
FR7820802A 1977-07-13 1978-07-12 Pales et rotors d'helicopteres ameliores Granted FR2397328A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/815,613 US4130377A (en) 1977-07-13 1977-07-13 Helicopter blade and rotor

Publications (2)

Publication Number Publication Date
FR2397328A1 true FR2397328A1 (fr) 1979-02-09
FR2397328B1 FR2397328B1 (fr) 1983-04-22

Family

ID=25218308

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7820802A Granted FR2397328A1 (fr) 1977-07-13 1978-07-12 Pales et rotors d'helicopteres ameliores

Country Status (6)

Country Link
US (1) US4130377A (fr)
JP (1) JPS5420597A (fr)
DE (1) DE2829542A1 (fr)
FR (1) FR2397328A1 (fr)
GB (1) GB2001023B (fr)
IT (1) IT1097240B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0067097A1 (fr) * 1981-06-05 1982-12-15 Office National d'Etudes et de Recherches Aérospatiales (O.N.E.R.A.) Extrémité de pale pour voilure tournante d'aéronef
JPH04176795A (ja) * 1990-11-13 1992-06-24 Mitsubishi Heavy Ind Ltd ヘリコプタ回転翼
EP0842846A1 (fr) 1996-11-19 1998-05-20 Eurocopter Pale à extrémité en flèche pour voilure tournante d'aéronef

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2856400C2 (de) * 1978-01-03 1987-04-30 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland, London Tragflügel, insbesondere für Drehflügelflugzeuge
US4248572A (en) * 1978-12-11 1981-02-03 United Technologies Corporation Helicopter blade
US4334828A (en) * 1980-01-21 1982-06-15 United Technologies Corporation Helicopter blade with a tip having a selected combination of sweep, taper and anhedral to improve hover efficiency
US4324530A (en) * 1980-01-21 1982-04-13 United Technologies Corp. Helicopter blade with a tip having a selected combination of sweep, taper and anhedral to improve hover efficiency
US4789305A (en) * 1985-04-26 1988-12-06 Vaughen Jack F Self-feathering rotary wing
US4655685A (en) * 1985-12-16 1987-04-07 United Technologies Corporation Helicopter main rotor blade having a short span slot near the tip end
US5636969A (en) * 1995-03-28 1997-06-10 Sikorsky Aircraft Corporation Torque tube/spar assembly for variable diameter helicopter rotors
JPH09254894A (ja) * 1996-03-26 1997-09-30 Commuter Herikoputa Senshin Gijutsu Kenkyusho:Kk フラップ付ヘリコプタブレードおよびこれを用いたロータ制御装置
GB2312712A (en) * 1996-04-30 1997-11-05 Gkn Westland Helicopters Ltd Propeller/rotor blade
JP3916723B2 (ja) * 1997-05-15 2007-05-23 富士重工業株式会社 回転翼航空機の回転翼羽根
FR2768121B1 (fr) * 1997-09-10 1999-11-19 Onera (Off Nat Aerospatiale) Pale a signature sonore reduite, pour voilure tournante d'aeronef, et voilure tournante comportant une telle pale
US6059532A (en) * 1997-10-24 2000-05-09 Alliedsignal Inc. Axial flow turbo-machine fan blade having shifted tip center of gravity axis
JP4535550B2 (ja) * 2000-02-23 2010-09-01 富士重工業株式会社 回転翼航空機の回転翼羽根
US7252479B2 (en) * 2005-05-31 2007-08-07 Sikorsky Aircraft Corporation Rotor blade for a high speed rotary-wing aircraft
EP3225543B1 (fr) * 2016-04-01 2018-11-14 AIRBUS HELICOPTERS DEUTSCHLAND GmbH Ensemble d'hélice doté avec au moins deux pales d'hélice
CN112173075B (zh) * 2020-09-25 2022-12-30 中国直升机设计研究所 一种直升机低噪声旋翼桨叶气动外形
US12110104B2 (en) * 2022-08-31 2024-10-08 Lockheed Martin Corporation Method of stabilizing articulated rotor blade

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2348105A1 (fr) * 1976-04-12 1977-11-10 United Technologies Corp Pale pour rotor d'helicoptere

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB418212A (en) * 1933-03-21 1934-10-22 Audrey Gretchen Coats Improvements in or relating to helicopter and rotating wing aircraft
US3200887A (en) * 1963-08-09 1965-08-17 Enstrom Corp Helicopter rotor system having elastomeric bearings
US3232349A (en) * 1964-12-02 1966-02-01 Enstrom Corp Rotor system utilizing centrifugal deflection of non-radial blades
US3558082A (en) * 1968-07-16 1971-01-26 Ralph F Bennie Rotary wing aircraft
US3589831A (en) * 1969-11-10 1971-06-29 Kaman Corp Control system for rotary wing vehicle
US3926536A (en) * 1970-10-15 1975-12-16 Westland Aircraft Ltd Semi-rigid rotor systems for rotary wing aircraft
US3721507A (en) * 1971-09-22 1973-03-20 United Aircraft Corp Blade for high speed helicopter
US3822105A (en) * 1971-09-22 1974-07-02 United Aircraft Corp Helicopter blade
US3902821A (en) * 1973-12-07 1975-09-02 Summa Corp Helicopter rotor
US3999886A (en) * 1974-10-10 1976-12-28 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Hingeless helicopter rotor with improved stability

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2348105A1 (fr) * 1976-04-12 1977-11-10 United Technologies Corp Pale pour rotor d'helicoptere

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0067097A1 (fr) * 1981-06-05 1982-12-15 Office National d'Etudes et de Recherches Aérospatiales (O.N.E.R.A.) Extrémité de pale pour voilure tournante d'aéronef
JPH04176795A (ja) * 1990-11-13 1992-06-24 Mitsubishi Heavy Ind Ltd ヘリコプタ回転翼
EP0842846A1 (fr) 1996-11-19 1998-05-20 Eurocopter Pale à extrémité en flèche pour voilure tournante d'aéronef

Also Published As

Publication number Publication date
GB2001023A (en) 1979-01-24
IT1097240B (it) 1985-08-26
FR2397328B1 (fr) 1983-04-22
US4130377A (en) 1978-12-19
GB2001023B (en) 1982-01-06
IT7825635A0 (it) 1978-07-13
DE2829542A1 (de) 1979-01-25
JPS5420597A (en) 1979-02-16

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Legal Events

Date Code Title Description
ST Notification of lapse