GB372378A - Improvements in and connected with screw propellers - Google Patents
Improvements in and connected with screw propellersInfo
- Publication number
- GB372378A GB372378A GB33556/30A GB3355630A GB372378A GB 372378 A GB372378 A GB 372378A GB 33556/30 A GB33556/30 A GB 33556/30A GB 3355630 A GB3355630 A GB 3355630A GB 372378 A GB372378 A GB 372378A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blade
- leading edge
- roughenings
- screw propellers
- screw
- 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
- B63H1/00—Propulsive elements directly acting on water
- B63H1/02—Propulsive elements directly acting on water of rotary type
- B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
- B63H1/14—Propellers
- B63H1/18—Propellers with means for diminishing cavitation, e.g. supercavitation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H1/00—Propulsive elements directly acting on water
- B63H1/02—Propulsive elements directly acting on water of rotary type
- B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
- B63H1/14—Propellers
- B63H1/26—Blades
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H1/00—Propulsive elements directly acting on water
- B63H1/02—Propulsive elements directly acting on water of rotary type
- B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
- B63H1/14—Propellers
- B63H1/28—Other means for improving propeller efficiency
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Steroid Compounds (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Rotary Pumps (AREA)
Abstract
372,378. Screw propellers. STONE & CO., Ltd., J., Deptford, London, and TELFER, E. V., 12, Mosley Street, Newcastle-on-Tyne. Nov. 7, 1930, No. 33556. [Class 114.] The driving faces of screw propeller blades are formed with roughenings at or near the leading edge to reduce the velocity of water flow at this point and thus to prevent the formation of negative pressures. The blade a has roughening grooves or serrations b formed near the leading edge c, these being shallow at the leading edge, gradually increasing in coarseness and then gradually fading into the smooth surface of the blade. Similar roughenings may also be provided on the back of the blade.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB33556/30A GB372378A (en) | 1930-11-07 | 1930-11-07 | Improvements in and connected with screw propellers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB33556/30A GB372378A (en) | 1930-11-07 | 1930-11-07 | Improvements in and connected with screw propellers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB372378A true GB372378A (en) | 1932-05-09 |
Family
ID=10354466
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB33556/30A Expired GB372378A (en) | 1930-11-07 | 1930-11-07 | Improvements in and connected with screw propellers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB372378A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2589423A1 (en) * | 1985-11-04 | 1987-05-07 | Weldon Thomas | Propeller operating in a liquid medium |
US4846629A (en) * | 1986-05-19 | 1989-07-11 | Usui Kokusai Sangyo Kabushiki Kaisha | Blades for high speed propeller fan |
US4859150A (en) * | 1986-05-19 | 1989-08-22 | Usui Kokusai Sangyo Kabushiki Kaisha | Blades for low speed propeller fan |
US4869644A (en) * | 1986-03-22 | 1989-09-26 | Usui Kokusai Sangyo Kabushiki Kaisha | Blades for propeller fan |
US5209644A (en) * | 1991-01-11 | 1993-05-11 | United Technologies Corporation | Flow directing element for the turbine of a rotary machine and method of operation therefor |
EP2725235A1 (en) * | 2012-10-24 | 2014-04-30 | Siemens Aktiengesellschaft | Differentially rough airfoil and corresponding manufacturing method |
CN109050883A (en) * | 2018-08-07 | 2018-12-21 | 深圳市边锋智驱科技有限公司 | propeller |
WO2023124378A1 (en) * | 2021-12-29 | 2023-07-06 | 北京三快在线科技有限公司 | Propeller and aircraft |
-
1930
- 1930-11-07 GB GB33556/30A patent/GB372378A/en not_active Expired
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2589423A1 (en) * | 1985-11-04 | 1987-05-07 | Weldon Thomas | Propeller operating in a liquid medium |
US4869644A (en) * | 1986-03-22 | 1989-09-26 | Usui Kokusai Sangyo Kabushiki Kaisha | Blades for propeller fan |
US4846629A (en) * | 1986-05-19 | 1989-07-11 | Usui Kokusai Sangyo Kabushiki Kaisha | Blades for high speed propeller fan |
US4859150A (en) * | 1986-05-19 | 1989-08-22 | Usui Kokusai Sangyo Kabushiki Kaisha | Blades for low speed propeller fan |
US5209644A (en) * | 1991-01-11 | 1993-05-11 | United Technologies Corporation | Flow directing element for the turbine of a rotary machine and method of operation therefor |
EP2725235A1 (en) * | 2012-10-24 | 2014-04-30 | Siemens Aktiengesellschaft | Differentially rough airfoil and corresponding manufacturing method |
CN109050883A (en) * | 2018-08-07 | 2018-12-21 | 深圳市边锋智驱科技有限公司 | propeller |
WO2023124378A1 (en) * | 2021-12-29 | 2023-07-06 | 北京三快在线科技有限公司 | Propeller and aircraft |
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