GB550227A - Improvements in screw propellers - Google Patents
Improvements in screw propellersInfo
- Publication number
- GB550227A GB550227A GB802541A GB802541A GB550227A GB 550227 A GB550227 A GB 550227A GB 802541 A GB802541 A GB 802541A GB 802541 A GB802541 A GB 802541A GB 550227 A GB550227 A GB 550227A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blade
- blades
- main
- control
- pitch
- 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
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H3/00—Propeller-blade pitch changing
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Hydraulic Turbines (AREA)
Abstract
550,227. Screw propellers. STONE & CO., Ltd., J., and McALISTER, F. June 26, 1941. No. 8025. [Class 114] A screw propeller is provided with control blades attached to an edge of the main blades and so shaped that the pitch of the main blade is varied as desired from root to tip. In one form, Fig. 4, three control blades c<SP>3</SP>, c<SP>4</SP>, c<SP>5</SP> attached to the main blade a are arranged to decrease the pitch of the blade as a whole at the root and tip and to increase it at the central portion. A single control blade shaped to give the same result may be used instead of the three control blades. The pitch of the main blade a may be constant or varied from root to tip. The control and main blades may be attached by a rib, e.g. e, Fig. 16, on one blade engaging a groove in the other blade, or by pintles p, Fig. 19, the blade c after adjustment being secured by a bolt o passing through a slotted arm m<SP>1</SP> on the blade into the hub n. Adjustment may be effected while the propeller is rotating, by an arm t fixed to the blade and engaging between opposed buffers in a slot in a ring v rotated by a-pinion x driven by an electric motor. Gaps between the main and control blades may be closed by flexible plates k, Fig. 11, or the opposed edges of the blades may be shaped to minimise water turbulence therebetween.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB802541A GB550227A (en) | 1941-06-26 | 1941-06-26 | Improvements in screw propellers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB802541A GB550227A (en) | 1941-06-26 | 1941-06-26 | Improvements in screw propellers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB550227A true GB550227A (en) | 1942-12-30 |
Family
ID=9844338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB802541A Expired GB550227A (en) | 1941-06-26 | 1941-06-26 | Improvements in screw propellers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB550227A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2429665A (en) * | 1944-03-20 | 1947-10-28 | Biermann David | Variable pitch propeller |
| US2648390A (en) * | 1945-03-27 | 1953-08-11 | Lagabbe Edmond De | Variable pitch screw propeller |
| US4514143A (en) * | 1983-04-28 | 1985-04-30 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Aircraft rotor blade with passive tuned tab |
| US5328330A (en) * | 1993-08-02 | 1994-07-12 | Hudson Products Corporation | Extruded aluminum fan blade |
-
1941
- 1941-06-26 GB GB802541A patent/GB550227A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2429665A (en) * | 1944-03-20 | 1947-10-28 | Biermann David | Variable pitch propeller |
| US2648390A (en) * | 1945-03-27 | 1953-08-11 | Lagabbe Edmond De | Variable pitch screw propeller |
| US4514143A (en) * | 1983-04-28 | 1985-04-30 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Aircraft rotor blade with passive tuned tab |
| US5328330A (en) * | 1993-08-02 | 1994-07-12 | Hudson Products Corporation | Extruded aluminum fan blade |
| AU660876B2 (en) * | 1993-08-02 | 1995-07-06 | Hudson Products Corporation | A fan blade |
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