GB124935A - Improvements in Self Setting Sails or Blades of Windmills or of Tractor Screws or of Pusher Screws of Aeroplanes or Dirigibles. - Google Patents
Improvements in Self Setting Sails or Blades of Windmills or of Tractor Screws or of Pusher Screws of Aeroplanes or Dirigibles.Info
- Publication number
- GB124935A GB124935A GB722518A GB722518A GB124935A GB 124935 A GB124935 A GB 124935A GB 722518 A GB722518 A GB 722518A GB 722518 A GB722518 A GB 722518A GB 124935 A GB124935 A GB 124935A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blades
- blade
- screws
- screw
- rod
- 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
- B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
- B64C11/30—Blade pitch-changing mechanisms
- B64C11/32—Blade pitch-changing mechanisms mechanical
- B64C11/34—Blade pitch-changing mechanisms mechanical automatic
- B64C11/346—Blade pitch-changing mechanisms mechanical automatic actuated by the centrifugal force or the aerodynamic drag acting on auxiliary masses or surfaces
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Wind Motors (AREA)
Abstract
124,935. Drzewiecki, S., and Rey, J. April 30, 1918. Blades &c.-Relates to self-adjusting screw blades for windmills and aircraft propellers adapted to allow a substantially constant speed to be obtained in spite of variations in the speed of the wind or the aircraft. A socket c mounted on the end of a shaft d carries in a transverse sleeve e a rod f freely pivoted therein and fitted at one end with the screw blade g and at the other end with a counterweight h. The weight h not only balances the centrifugal pull of the blade g, but, by reason of its inclination to the shaft, exerts a torsional action on the rod f opposite to, and greater than, that exerted by the blade g. This torsional action tends to increase the pitch of the screw and is effective only when it overcomes the opposite tendency of springs j, j<1>, stops k, L limiting the movement in each direction. The blade assumes an inclination the pitch of which multiplied by the predetermined speed corresponds to the speed of the wind or the aeroplane. In place of one counterweight, several may be used; Fig. 6 shows one weight M for balancing the centrifugal pull of the blade, and two N<1>, N<2> for producing the torsion couple. The position of these weights N<1>, N<2> may be varied; for example, they may be placed at N', N''. Screw devices P, Q, R, Fig. 7, may be provided for adjusting the positions of the weights on the rod f. A propeller having two intergeared blades is shown in Fig. 8; and Fig. 9 shows two blades connected by one or more flexible members T to balance one another centrifugally.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB722518A GB124935A (en) | 1918-04-30 | 1918-04-30 | Improvements in Self Setting Sails or Blades of Windmills or of Tractor Screws or of Pusher Screws of Aeroplanes or Dirigibles. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB722518A GB124935A (en) | 1918-04-30 | 1918-04-30 | Improvements in Self Setting Sails or Blades of Windmills or of Tractor Screws or of Pusher Screws of Aeroplanes or Dirigibles. |
Publications (1)
Publication Number | Publication Date |
---|---|
GB124935A true GB124935A (en) | 1919-04-10 |
Family
ID=32342875
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB722518A Expired GB124935A (en) | 1918-04-30 | 1918-04-30 | Improvements in Self Setting Sails or Blades of Windmills or of Tractor Screws or of Pusher Screws of Aeroplanes or Dirigibles. |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB124935A (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2427586A (en) * | 1944-02-07 | 1947-09-16 | Wickwire Spencer Aviat Corp | Variable pitch propeller |
US2947365A (en) * | 1956-02-23 | 1960-08-02 | United Aircraft Corp | Means for dynamically balancing rotor blades |
US4316698A (en) * | 1979-08-23 | 1982-02-23 | Bertoia Val O | Fluid-driven turbine with speed regulation |
US4324528A (en) * | 1975-05-12 | 1982-04-13 | Sven Svenning Konsult Ab | Automatic regulating device for keeping constant the speed of wind-powered propellers |
US4325674A (en) * | 1978-10-06 | 1982-04-20 | Olle Ljungstrom | Wind turbine of cross-flow type |
US4517467A (en) * | 1982-07-24 | 1985-05-14 | Messerschmidt-Bolkow-Blohm Gmbh | Wind turbine with gale protection |
GB2151712A (en) * | 1983-12-19 | 1985-07-24 | Sundstrand Corp | Ram air turbine |
US4678923A (en) * | 1985-11-13 | 1987-07-07 | Fernand Trepanier | Windmill |
GB2257480A (en) * | 1991-07-10 | 1993-01-13 | Dowty Aerospace Gloucester | A pitch control mechanism. |
WO2015022474A1 (en) | 2013-08-14 | 2015-02-19 | Snecma | Turbomachine impellor rotor with device for feathering the blades of the impellor |
US20160083077A1 (en) * | 2014-09-22 | 2016-03-24 | The Boeing Company | Single blade propeller with variable pitch |
CN105620749A (en) * | 2016-03-03 | 2016-06-01 | 三翼航空科技南通有限公司 | Rollin wing variable pitch mechanism |
-
1918
- 1918-04-30 GB GB722518A patent/GB124935A/en not_active Expired
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2427586A (en) * | 1944-02-07 | 1947-09-16 | Wickwire Spencer Aviat Corp | Variable pitch propeller |
US2947365A (en) * | 1956-02-23 | 1960-08-02 | United Aircraft Corp | Means for dynamically balancing rotor blades |
US4324528A (en) * | 1975-05-12 | 1982-04-13 | Sven Svenning Konsult Ab | Automatic regulating device for keeping constant the speed of wind-powered propellers |
US4325674A (en) * | 1978-10-06 | 1982-04-20 | Olle Ljungstrom | Wind turbine of cross-flow type |
US4316698A (en) * | 1979-08-23 | 1982-02-23 | Bertoia Val O | Fluid-driven turbine with speed regulation |
US4517467A (en) * | 1982-07-24 | 1985-05-14 | Messerschmidt-Bolkow-Blohm Gmbh | Wind turbine with gale protection |
GB2151712A (en) * | 1983-12-19 | 1985-07-24 | Sundstrand Corp | Ram air turbine |
US4678923A (en) * | 1985-11-13 | 1987-07-07 | Fernand Trepanier | Windmill |
GB2257480A (en) * | 1991-07-10 | 1993-01-13 | Dowty Aerospace Gloucester | A pitch control mechanism. |
EP0522874A1 (en) * | 1991-07-10 | 1993-01-13 | Dowty Aerospace Gloucester Limited | Pitch control mechanism for ram air turbine |
GB2257480B (en) * | 1991-07-10 | 1995-07-19 | Dowty Aerospace Gloucester | A pitch control mechanism |
WO2015022474A1 (en) | 2013-08-14 | 2015-02-19 | Snecma | Turbomachine impellor rotor with device for feathering the blades of the impellor |
FR3009710A1 (en) * | 2013-08-14 | 2015-02-20 | Snecma | ROTOR FOR TURBOMACHINE PROPELLER WITH DEVICE FOR FLAGING PROPELLER BLADES |
GB2530963A (en) * | 2013-08-14 | 2016-04-06 | Snecma | Turbomachine impellor rotor with device for feathering the blades of the impellor |
US10036262B2 (en) | 2013-08-14 | 2018-07-31 | Snecma | Turbomachine impellor rotor with device for feathering the blades of the impellor |
GB2530963B (en) * | 2013-08-14 | 2020-04-22 | Snecma | Turbomachine impellor rotor with device for feathering the blades of the impellor |
US20160083077A1 (en) * | 2014-09-22 | 2016-03-24 | The Boeing Company | Single blade propeller with variable pitch |
US9889925B2 (en) * | 2014-09-22 | 2018-02-13 | The Boeing Company | Single blade propeller with variable pitch |
CN105620749A (en) * | 2016-03-03 | 2016-06-01 | 三翼航空科技南通有限公司 | Rollin wing variable pitch mechanism |
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