CA1143354A - Helicopter blade with a tip having a selected combination of sweep, taper, and anhedral to improve hover efficiency - Google Patents

Helicopter blade with a tip having a selected combination of sweep, taper, and anhedral to improve hover efficiency

Info

Publication number
CA1143354A
CA1143354A CA000365237A CA365237A CA1143354A CA 1143354 A CA1143354 A CA 1143354A CA 000365237 A CA000365237 A CA 000365237A CA 365237 A CA365237 A CA 365237A CA 1143354 A CA1143354 A CA 1143354A
Authority
CA
Canada
Prior art keywords
blade
tip
helicopter
tip portion
radius
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
CA000365237A
Other languages
English (en)
French (fr)
Inventor
William D. Jepson
Evan A. Fradenburgh
Robert C. Moffitt
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
Application granted granted Critical
Publication of CA1143354A publication Critical patent/CA1143354A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Toys (AREA)
CA000365237A 1980-01-21 1980-11-21 Helicopter blade with a tip having a selected combination of sweep, taper, and anhedral to improve hover efficiency Expired CA1143354A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US114,131 1980-01-21
US06/114,131 US4324530A (en) 1980-01-21 1980-01-21 Helicopter blade with a tip having a selected combination of sweep, taper and anhedral to improve hover efficiency

Publications (1)

Publication Number Publication Date
CA1143354A true CA1143354A (en) 1983-03-22

Family

ID=22353519

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000365237A Expired CA1143354A (en) 1980-01-21 1980-11-21 Helicopter blade with a tip having a selected combination of sweep, taper, and anhedral to improve hover efficiency

Country Status (11)

Country Link
US (1) US4324530A (enExample)
JP (1) JPS56167599A (enExample)
AU (1) AU536734B2 (enExample)
CA (1) CA1143354A (enExample)
CH (1) CH652980A5 (enExample)
DE (1) DE3100800A1 (enExample)
ES (1) ES8203288A1 (enExample)
FR (1) FR2473983A1 (enExample)
GB (1) GB2067493B (enExample)
IL (1) IL61879A (enExample)
IT (1) IT1135095B (enExample)

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US4722608A (en) * 1985-07-30 1988-02-02 General Signal Corp. Mixing apparatus
FR2617118B1 (fr) * 1987-06-29 1992-08-21 Aerospatiale Pale a extremite courbe pour voilure tournante d'aeronef
GB8815955D0 (en) * 1988-07-05 1988-11-16 Westland Helicopters Helicopter rotor blades
JP2525836Y2 (ja) * 1989-03-29 1997-02-12 川崎重工業株式会社 回転翼用ブレードの先端部形状
US5190441A (en) * 1990-08-13 1993-03-02 General Electric Company Noise reduction in aircraft propellers
GB9022281D0 (en) * 1990-10-13 1991-02-20 Westland Helicopters Helicopter rotor blades
GB9023141D0 (en) * 1990-10-24 1991-07-10 Westland Helicopters Helicopter rotor blades
US5137427A (en) * 1990-12-20 1992-08-11 United Technologies Corporation Quiet tail rotor
US5320494A (en) * 1992-12-22 1994-06-14 United Technologies Corporation Helicopter rotor blade having a replaceable anhedral tip
DE4400806A1 (de) * 1994-01-13 1995-07-20 Bernd Stolz Propeller
AUPN163795A0 (en) * 1995-03-10 1995-04-06 DIPNALL, David A device for extracting energy from moving water particles
GB9600123D0 (en) * 1996-01-04 1996-03-06 Westland Helicopters Aerofoil
DE29602559U1 (de) * 1996-02-14 1996-04-18 Kähler, Kai, 20355 Hamburg Drehflügelluftfahrzeug
FR2755941B1 (fr) 1996-11-19 1999-01-15 Eurocopter France Pale a extremite en fleche pour voilure tournante d'aeronef
US5885059A (en) * 1996-12-23 1999-03-23 Sikorsky Aircraft Corporation Composite tip cap assembly for a helicopter main 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
JP3189251B2 (ja) * 1999-03-12 2001-07-16 株式会社コミュータヘリコプタ先進技術研究所 回転翼機のロータブレード
US6200096B1 (en) 1999-04-16 2001-03-13 Sikorsky Aircraft Corporation Actuation system for an active rotor control system
US6295006B1 (en) 1999-04-16 2001-09-25 Sikorsky Aircraft Corporation Flap angle measurement system for an active rotor control system
US6196796B1 (en) 1999-04-22 2001-03-06 Sikorsky Aircraft Corporation High torque actuation system for an active rotor control system
US6354536B1 (en) 2000-08-08 2002-03-12 Sikorsky Aircraft Corporation Rotor hub mounted actuator for controlling a blade on a rotorcraft
US6497385B1 (en) 2000-11-08 2002-12-24 Continuum Dynamics, Inc. Rotor blade with optimized twist distribution
KR20050088325A (ko) * 2003-01-02 2005-09-05 알로이즈 우벤 풍력 발전 플랜트를 위한 회전자 날개
DE10300284A1 (de) * 2003-01-02 2004-07-15 Aloys Wobben Rotorblatt für eine Windenergieanlage
DE20301445U1 (de) * 2003-01-30 2004-06-09 Moser, Josef Rotorblatt
DE10332875B4 (de) * 2003-07-19 2016-11-24 Windreich GmbH Rotorflügelblatt
RU2253506C1 (ru) * 2003-10-22 2005-06-10 Орловский государственный технический университет (ОрелГТУ) Пропеллерная мешалка конструкции землякова н.в. для перемешивания жидких сред
JP2005335621A (ja) * 2004-05-28 2005-12-08 Fuji Heavy Ind Ltd ヘリコプタのロータブレード
JP4740580B2 (ja) * 2004-11-30 2011-08-03 株式会社ベルシオン 横軸風車のブレード並びに横軸風車
JP5348822B2 (ja) * 2005-09-15 2013-11-20 株式会社ベルシオン 横軸プロペラ
WO2006059472A1 (ja) * 2004-11-30 2006-06-08 Global Energy Co., Ltd. プロペラ並びに横軸風車
US7513750B2 (en) * 2006-03-08 2009-04-07 Sikorsky Aircraft Corporation Rotor blade tip planform
MX2009009244A (es) 2007-03-01 2009-09-08 Delta T Corp Extension angular de plano aerodinamico para aspa de ventilador.
US7762785B2 (en) * 2007-12-10 2010-07-27 Sikorsky Aircraft Corporation Main rotor blade with integral tip section
DE102007062490B4 (de) * 2007-12-20 2011-07-28 Eurocopter Deutschland GmbH, 86609 Rotorblatt für ein Drehflügelflugzeug
US8066219B2 (en) * 2008-04-25 2011-11-29 Karem Aircraft, Inc. Anhedral tip blades for tiltrotor aircraft
US8419371B2 (en) * 2008-05-30 2013-04-16 General Electric Company Wind turbine blades with twisted and tapered tips
US8858183B2 (en) * 2010-02-26 2014-10-14 Sikorsky Aircraft Corporation Rotor blade for a rotary-wing aircraft
US20120128501A1 (en) * 2010-11-23 2012-05-24 4Front Engineered Solutions, Inc. Fan blade tips
GB2486021B (en) * 2010-12-02 2017-07-19 Agustawestland Ltd Aerofoil
JP5602060B2 (ja) * 2011-02-28 2014-10-08 三菱重工業株式会社 風車翼およびこれを備えた風力発電装置ならびに風車翼の設計方法
US8842000B2 (en) 2012-07-17 2014-09-23 4Front Engineered Solutions, Inc. Fire control systems
FR3005301B1 (fr) * 2013-05-03 2015-05-29 Eurocopter France Rotor carene d'aeronef, et giravion
EP2821634A1 (en) * 2013-07-05 2015-01-07 youWINenergy GmbH Mountable wing tip device for mounting on a rotor blade of a wind turbine arrangement
US9874214B2 (en) 2014-01-28 2018-01-23 4Front Engineered Solutions, Inc. Fan with fan blade mounting structure
US9726192B2 (en) 2015-03-31 2017-08-08 Assa Abloy Entrance Systems Ab Fan blades and associated blade tips
US10414486B2 (en) 2015-11-30 2019-09-17 General Electric Company Airfoil for a rotary machine including a propellor assembly
EP3293113B1 (en) 2016-09-07 2018-12-12 LEONARDO S.p.A. Rotor for a hover-capable aircraft and related method of control
US10207793B2 (en) 2016-11-30 2019-02-19 Bell Helicopter Textron Inc. Rotor blade having variable twist
US10899440B2 (en) 2017-03-09 2021-01-26 Sikorsky Aircraft Corporation Rotor blade tip design for improved hover and cruise performance
US11498671B2 (en) * 2019-05-13 2022-11-15 Lockheed Martin Corporation Replacement tip section for a rotor blade and method of replacing a rotor blade tip section
CN115343003B (zh) * 2022-04-29 2025-08-29 南京航空航天大学 基于桨叶剖面测量弯矩的直升机桨叶动载荷识别方法
FR3137136B1 (fr) * 2022-06-28 2025-07-11 Sas Flexeole Pale d'éolienne ayant une forme d'extrémité optimisée
JP7793500B2 (ja) * 2022-09-30 2026-01-05 本田技研工業株式会社 ブレード及びロータ
US12448111B1 (en) * 2024-04-17 2025-10-21 Textron Innovations Inc. Method and system for inverse-tapered high-speed rotors

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3399731A (en) * 1967-07-18 1968-09-03 Algy F. Giles Jr. Rotor-blade
US3558081A (en) * 1969-02-20 1971-01-26 Airmarine Corp Airborne vehicles
US3721507A (en) * 1971-09-22 1973-03-20 United Aircraft Corp Blade for high speed helicopter
GB1538055A (en) * 1975-05-19 1979-01-10 Westland Aircraft Ltd Helicopter rotor blades
US4130377A (en) * 1977-07-13 1978-12-19 United Technologies Corporation Helicopter blade and rotor

Also Published As

Publication number Publication date
ES498662A0 (es) 1982-04-01
GB2067493A (en) 1981-07-30
IT1135095B (it) 1986-08-20
IT8119222A0 (it) 1981-01-21
GB2067493B (en) 1983-07-06
DE3100800A1 (de) 1982-01-07
CH652980A5 (de) 1985-12-13
FR2473983B1 (enExample) 1984-04-20
JPS56167599A (en) 1981-12-23
IL61879A (en) 1985-07-31
AU6615381A (en) 1981-07-30
US4324530A (en) 1982-04-13
ES8203288A1 (es) 1982-04-01
AU536734B2 (en) 1984-05-24
FR2473983A1 (fr) 1981-07-24

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Legal Events

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