CA1020926A - Droop stops for helicopter rotor having elastomeric bearings - Google Patents
Droop stops for helicopter rotor having elastomeric bearingsInfo
- Publication number
- CA1020926A CA1020926A CA235,715A CA235715A CA1020926A CA 1020926 A CA1020926 A CA 1020926A CA 235715 A CA235715 A CA 235715A CA 1020926 A CA1020926 A CA 1020926A
- Authority
- CA
- Canada
- Prior art keywords
- helicopter rotor
- elastomeric bearings
- droop
- stops
- droop stops
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/32—Rotors
- B64C27/322—Blade travel limiting devices, e.g. droop stops
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/32—Rotors
- B64C27/35—Rotors having elastomeric joints
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Toys (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/540,309 US3932059A (en) | 1975-01-10 | 1975-01-10 | Droop stops for helicopter rotor having elastomeric bearings |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1020926A true CA1020926A (en) | 1977-11-15 |
Family
ID=24154894
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA235,715A Expired CA1020926A (en) | 1975-01-10 | 1975-09-15 | Droop stops for helicopter rotor having elastomeric bearings |
Country Status (7)
Country | Link |
---|---|
US (1) | US3932059A (de) |
JP (1) | JPS5195396A (de) |
CA (1) | CA1020926A (de) |
DE (1) | DE2600685A1 (de) |
FR (1) | FR2297166A1 (de) |
GB (1) | GB1532822A (de) |
IT (1) | IT1054045B (de) |
Families Citing this family (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2025338B (en) * | 1978-06-02 | 1982-08-04 | Aerospatiale | Helicopterrotor |
IT1117626B (it) * | 1979-02-02 | 1986-02-17 | Aereonautiche Giovanni Augusta | Rotore articolato per elicotteri |
US4242047A (en) * | 1979-05-02 | 1980-12-30 | United Technologies Corporation | Adjustable bearing centering means for helicopter rotor elastomeric bearings |
US4368006A (en) * | 1980-08-07 | 1983-01-11 | The United States Of America As Represented By The Secretary Of The Navy | Droop stop for fully articulated rotor |
IT1155132B (it) * | 1982-03-11 | 1987-01-21 | Agusta Aeronaut Costr | Rotore per elicotteri |
IT1155133B (it) * | 1982-03-11 | 1987-01-21 | Agusta Aeronaut Costr | Rotore per elicotteri |
IT1205405B (it) * | 1983-05-05 | 1989-03-15 | Agusta Aeronaut Costr | Rotore per elicotteri |
US4549852A (en) * | 1983-12-16 | 1985-10-29 | United Technologies Corporation | Helicopter blade droop stop with slidable droop stop seat |
IT1182447B (it) * | 1985-02-19 | 1987-10-05 | Agusta Aeronaut Costr | Rotore per elicotteri |
IT1196801B (it) * | 1986-11-25 | 1988-11-25 | Agusta Aeronaut Costr | Rotore per elicotteri |
US5059094A (en) * | 1989-10-13 | 1991-10-22 | Bell Helicopter Textron, Inc. | Rotor redundant force retention system for vtol and vstol aircraft |
US5092738A (en) * | 1990-04-06 | 1992-03-03 | United Technologies Corporation | Flexbeam helicopter rotor with improved snubber-vibration damper between the torque tube and the flexible spar member |
US5601408A (en) * | 1996-03-18 | 1997-02-11 | Sikorsky Aircraft Corporation | Axisymmetric elastomeric bearing assembly for helicopter rotors |
US6309182B1 (en) * | 2000-04-05 | 2001-10-30 | The Boeing Company | Helicopter rotor droop stop mechanism |
US7354248B2 (en) * | 2005-10-17 | 2008-04-08 | Sikorsky Aircraft Corporation | Elastomeric bearing elements for droop stop mechanisms |
US7448855B2 (en) * | 2006-02-17 | 2008-11-11 | The Boeing Company | Droop stop mechanism for helicopter rotor blade |
US8882462B2 (en) | 2008-12-09 | 2014-11-11 | Sikorsky Aircraft Corporation | Lead stop for rotor system with fluid-elastomeric lead/lag damper |
US10000283B2 (en) * | 2013-03-14 | 2018-06-19 | William L. Hinks | Negative spring compensation for elastomeric bearing torque |
FR3017855B1 (fr) | 2014-02-21 | 2016-04-29 | Airbus Helicopters | Rotor pour giravion comportant un mecanisme de butee en battement, et giravion |
FR3020341B1 (fr) * | 2014-04-24 | 2016-04-29 | Airbus Helicopters | Rotor comportant un mecanisme de butee en trainee, et aeronef |
US10272996B2 (en) | 2015-02-05 | 2019-04-30 | Sikorsky Aircraft Corporation | Abrasion resistant pivot bearing |
US20160238068A1 (en) * | 2015-02-12 | 2016-08-18 | Aktiebolaget Skf | Combination spherical and laminated bearing |
US10308356B2 (en) | 2016-11-22 | 2019-06-04 | Bell Helicopter Textron Inc. | Axial springs for rotor hub assembly |
CN113942639B (zh) * | 2021-10-09 | 2023-05-05 | 中国直升机设计研究所 | 一种直升机离心式桨叶挥舞限动*** |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3501250A (en) * | 1968-03-22 | 1970-03-17 | Boeing Co | Rotor hub |
US3533713A (en) * | 1968-04-01 | 1970-10-13 | Lockheed Aircraft Corp | Rotor locking device |
FR2041762B1 (de) * | 1969-05-28 | 1973-11-16 | Aerospatiale | |
US3778189A (en) * | 1972-09-05 | 1973-12-11 | United Aircraft Corp | Elastomeric helicopter rotor head with dynamic and static blade coning and droop stops |
US3853426A (en) * | 1972-09-05 | 1974-12-10 | United Aircraft Corp | Elastomeric helicopter rotor head with dynamic and static blade coning and droop stops |
IL42948A (en) * | 1972-09-05 | 1976-05-31 | United Aircraft Corp | Helicopter rotor |
-
1975
- 1975-01-10 US US05/540,309 patent/US3932059A/en not_active Expired - Lifetime
- 1975-09-15 CA CA235,715A patent/CA1020926A/en not_active Expired
-
1976
- 1976-01-08 GB GB612/76A patent/GB1532822A/en not_active Expired
- 1976-01-09 IT IT19115/76A patent/IT1054045B/it active
- 1976-01-09 DE DE19762600685 patent/DE2600685A1/de not_active Withdrawn
- 1976-01-09 JP JP51001966A patent/JPS5195396A/ja active Pending
- 1976-01-09 FR FR7600414A patent/FR2297166A1/fr not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
GB1532822A (en) | 1978-11-22 |
US3932059A (en) | 1976-01-13 |
DE2600685A1 (de) | 1976-07-15 |
IT1054045B (it) | 1981-11-10 |
FR2297166A1 (fr) | 1976-08-06 |
JPS5195396A (de) | 1976-08-20 |
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