GB1521530A - Helicopter rotor blade having a selectively shaped and positioned ramp tab bonded thereto to eliminate blade pitching moment dynamic unbalance - Google Patents

Helicopter rotor blade having a selectively shaped and positioned ramp tab bonded thereto to eliminate blade pitching moment dynamic unbalance

Info

Publication number
GB1521530A
GB1521530A GB51083/75A GB5108375A GB1521530A GB 1521530 A GB1521530 A GB 1521530A GB 51083/75 A GB51083/75 A GB 51083/75A GB 5108375 A GB5108375 A GB 5108375A GB 1521530 A GB1521530 A GB 1521530A
Authority
GB
United Kingdom
Prior art keywords
blade
tabs
helicopter rotor
dynamic unbalance
eliminate
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
GB51083/75A
Other languages
English (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.)
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 GB1521530A publication Critical patent/GB1521530A/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
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M1/00—Testing static or dynamic balance of machines or structures
    • G01M1/14—Determining imbalance
    • G01M1/16—Determining imbalance by oscillating or rotating the body to be tested
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M1/00—Testing static or dynamic balance of machines or structures
    • G01M1/30—Compensating imbalance
    • G01M1/36—Compensating imbalance by adjusting position of masses built-in the body to be tested
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S416/00—Fluid reaction surfaces, i.e. impellers
    • Y10S416/50—Vibration damping features

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Toys (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
GB51083/75A 1974-12-18 1975-12-12 Helicopter rotor blade having a selectively shaped and positioned ramp tab bonded thereto to eliminate blade pitching moment dynamic unbalance Expired GB1521530A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/533,916 US3952601A (en) 1974-12-18 1974-12-18 Helicopter rotor blade balancing method

Publications (1)

Publication Number Publication Date
GB1521530A true GB1521530A (en) 1978-08-16

Family

ID=24127963

Family Applications (1)

Application Number Title Priority Date Filing Date
GB51083/75A Expired GB1521530A (en) 1974-12-18 1975-12-12 Helicopter rotor blade having a selectively shaped and positioned ramp tab bonded thereto to eliminate blade pitching moment dynamic unbalance

Country Status (7)

Country Link
US (1) US3952601A (enExample)
JP (1) JPS5189696A (enExample)
CA (1) CA1020927A (enExample)
DE (1) DE2552123A1 (enExample)
FR (1) FR2294909A1 (enExample)
GB (1) GB1521530A (enExample)
IT (1) IT1050762B (enExample)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4057363A (en) * 1975-11-20 1977-11-08 United Technologies Corporation Extended arm bifilar and method to eliminate second order vibration excitation
US4789305A (en) * 1985-04-26 1988-12-06 Vaughen Jack F Self-feathering rotary wing
JPH0753653Y2 (ja) * 1991-10-17 1995-12-13 ケイエスケイ株式会社 野球用グラブの芯材並びにそれを用いた野球用グラブ
US5475622A (en) * 1994-08-31 1995-12-12 United Technologies Corp. Method and apparatus for balancing helicopter rotor blades
FR2784351B1 (fr) * 1998-10-12 2000-12-08 Eurocopter France Dispositif et procede pour reduire les vibrations engendrees sur la structure d'un aeronef a voilure tournante, notamment un helicoptere
US6322324B1 (en) 2000-03-03 2001-11-27 The Boeing Company Helicopter in-flight rotor tracking system, method, and smart actuator therefor
RU2194959C1 (ru) * 2001-08-24 2002-12-20 Открытое акционерное общество "Камов" Способ определения дисбаланса несущих винтов вертолета
RU2247344C1 (ru) * 2003-10-29 2005-02-27 Открытое акционерное общество "Камов" Способ определения дисбаланса несущих винтов вертолета
DE102004014992A1 (de) * 2004-03-26 2005-10-13 Hofmann Mess- Und Auswuchttechnik Gmbh & Co. Kg Auswuchtvorrichtung zur Kompensation der Unwucht von Rotoren von Windkraftanlagen
US8192162B2 (en) * 2008-07-29 2012-06-05 Loftus Robert T Field installable and removable helicopter rotor blade vibration and blade tracking device
US9440737B1 (en) 2012-05-11 2016-09-13 The Boeing Company Apparatus to adjust airfoils of rotor blades
CN104002966B (zh) * 2014-06-03 2017-01-18 北京航空航天大学 一种抑制倾转旋翼机回转颤振的旋翼桨叶构型设计
WO2017172000A2 (en) * 2016-01-29 2017-10-05 Sikorsky Aircraft Corporation Helicopter tail rotor blades and blade assemblies
CN106005397A (zh) * 2016-07-14 2016-10-12 上海未来伙伴机器人有限公司 多旋翼机桨、多旋翼机以及改善桨叶静不平衡的方法
US11391156B2 (en) 2020-01-23 2022-07-19 Textron Innovations Inc. Static rotor blade assembly balancing
US12006026B2 (en) 2020-07-10 2024-06-11 Haymatt, L.L.C. Sound-reducing rotor blade tracking wedge profile
CN112478136B (zh) * 2020-12-03 2022-04-22 中国航天空气动力技术研究院 一种带金属桨柄的桨叶与桨毂的连接装置
CN112478135B (zh) * 2020-12-03 2022-04-22 中国航天空气动力技术研究院 一种螺旋桨桨叶与变距装置的连接结构
CN113581489B (zh) * 2021-07-20 2023-01-13 中国民用航空飞行学院 一种飞机操纵面静平衡矩调节装置和调节方法

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US331369A (en) * 1885-12-01 John bliss and geoege h
US1990291A (en) * 1931-12-05 1935-02-05 Autogiro Co Of America Air-rotor for aircraft
US2135700A (en) * 1935-01-16 1938-11-08 Autogiro Co Of America Autorotative wing for aircraft
US2161699A (en) * 1936-05-01 1939-06-06 Autogiro Co Of America Blade for aircraft sustaining rotors
GB496700A (en) * 1937-08-19 1938-12-05 Edgar Allan Wawn Improvements relating to screw and like propellers
US2430948A (en) * 1944-05-25 1947-11-18 Mcdonnell Aircraft Corp Rotor blade
US2552727A (en) * 1945-08-28 1951-05-15 United Aircraft Corp Method of balancing rotor blades
US2961053A (en) * 1953-01-07 1960-11-22 Prewitt Aircraft Company Airfoil structure and assembly
US3018832A (en) * 1955-06-30 1962-01-30 Prewitt Aircraft Company Aircraft structure
US2951542A (en) * 1957-10-21 1960-09-06 Parsons Corp Balance and tracking of rotor blades
FR1215675A (fr) * 1957-10-21 1960-04-20 Parsons Corp Procédé de fabrication et d'équilibrage des pales de rotor d'hélicoptères
US3237697A (en) * 1963-02-11 1966-03-01 Boeing Co Helicopter rotor blade
GB1150123A (en) * 1967-02-08 1969-04-30 Westland Aircraft Ltd Improvements in or relating to the Construction of Rotor Blades for Rotary Wing Aircraft
US3524354A (en) * 1967-12-19 1970-08-18 Boeing Co Tracking system for moving objects
SE331952B (enExample) * 1967-12-22 1971-01-18 Ingelman Sundberg A
US3830109A (en) * 1972-07-10 1974-08-20 G Litvinovich Device for dynamic balancing of rotors

Also Published As

Publication number Publication date
FR2294909A1 (fr) 1976-07-16
IT1050762B (it) 1981-03-20
JPS5189696A (enExample) 1976-08-05
US3952601A (en) 1976-04-27
DE2552123A1 (de) 1976-06-24
CA1020927A (en) 1977-11-15
FR2294909B1 (enExample) 1980-01-04

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee