GB709673A - Improvements in or relating to helicopter rotors - Google Patents
Improvements in or relating to helicopter rotorsInfo
- Publication number
- GB709673A GB709673A GB9790/52A GB979052A GB709673A GB 709673 A GB709673 A GB 709673A GB 9790/52 A GB9790/52 A GB 9790/52A GB 979052 A GB979052 A GB 979052A GB 709673 A GB709673 A GB 709673A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pivoted
- blade
- flapping
- arm
- depending
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
Abstract
709,673. Helicopters. UNITED AIRCRAFT CORPORATION. April 18, 1952 [Aug. 18, 1951], No. 9790/52. Class 4 A helicopter rotor comprises a drag hinge pivoted to a hub and having a depending projection, a blade having a root portion pivoted to said drag hinge for flapping movements and having a depending portion terminating adjacent said projection and centrifugally operated locking means movable bodily with said blade as the latter moves about said drag hinge for effecting a locking connection between said projection and said depending portion and preventing upward flapping of said blade when the latter is stationary or is rotating below a predetermined speed. The rotor drive shaft 22 carries spaced plates 32, 34 between which are pivoted drag pivots 54 each carrying a flapping arm 52 to which the blade root 40 is attached for pitch changing movements. Each member 54 carries a depending arm 90 having pivoted thereto at 86 a spring loaded element of a toggle mechanism 30, the other element being formed by a pair of spaced arms 68 pivoted to the spring loaded element at 74 and to the flapping arm 52 at 72. The toggle is biased by springs 105 into an over-centre position in which a stop face on the upper end of the spring loaded member engages a mating face on the arm 90 so that the blade is restrained from upward flapping movements. When the speed of the rotor rises above a predetermined minimum centrifugal force causes the toggle to overcome the action of the springs 105 and swing outwardly so that the blades are free to flap upwardly. U.S.A. Specifications. 2,405,777 and 2,614,640 are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US709673XA | 1951-08-18 | 1951-08-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB709673A true GB709673A (en) | 1954-06-02 |
Family
ID=22098438
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9790/52A Expired GB709673A (en) | 1951-08-18 | 1952-04-18 | Improvements in or relating to helicopter rotors |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB709673A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2572357A1 (en) * | 1984-10-26 | 1986-05-02 | Messerschmitt Boelkow Blohm | Helicopter rotor with fibre composite plate blade mounting |
WO2011015688A3 (en) * | 2009-08-04 | 2011-07-21 | Heribert Soler Canela | Device for stiffening the rotor blades of a helicopter and/or autogyro |
CN105329442B (en) * | 2015-11-16 | 2017-09-22 | 深圳市龙云创新航空科技有限公司 | A kind of SUAV of body rotation |
CN114248908A (en) * | 2021-12-30 | 2022-03-29 | 广东汇天航空航天科技有限公司 | Screw and flight equipment |
-
1952
- 1952-04-18 GB GB9790/52A patent/GB709673A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2572357A1 (en) * | 1984-10-26 | 1986-05-02 | Messerschmitt Boelkow Blohm | Helicopter rotor with fibre composite plate blade mounting |
WO2011015688A3 (en) * | 2009-08-04 | 2011-07-21 | Heribert Soler Canela | Device for stiffening the rotor blades of a helicopter and/or autogyro |
ES2367162A1 (en) * | 2009-08-04 | 2011-10-28 | Heribert Soler Canela | Device for stiffening the rotor blades of a helicopter and/or autogyro |
CN105329442B (en) * | 2015-11-16 | 2017-09-22 | 深圳市龙云创新航空科技有限公司 | A kind of SUAV of body rotation |
CN114248908A (en) * | 2021-12-30 | 2022-03-29 | 广东汇天航空航天科技有限公司 | Screw and flight equipment |
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