GB185146A - Improvements in screw propellers - Google Patents
Improvements in screw propellersInfo
- Publication number
- GB185146A GB185146A GB8786/21A GB878621A GB185146A GB 185146 A GB185146 A GB 185146A GB 8786/21 A GB8786/21 A GB 8786/21A GB 878621 A GB878621 A GB 878621A GB 185146 A GB185146 A GB 185146A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blades
- screw propellers
- tip
- tangential
- boss
- 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
- B63H1/26—Blades
-
- 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
- B64C11/005—Spiral-shaped propellers
-
- 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
- B63H2001/122—Single or multiple threaded helicoidal screws, or the like, comprising foils extending over a substantial angle; Archimedean screws
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Screw Conveyors (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
185,146. Dungan, S. M. March 22, 1921. Screw propellers.-The blades of screw propellers have elliptically convex front faces and are curved lengthways so that the line joining the root to the tip is tangential to the boss and is inclined relatively to a radial plane containing the propeller axes and the blade tip. The blades start at the forward end 4 a.t the hub 1, Fig. 3 and each section is elliptical and tangential as in Fig. 4, the section increasing toward the rear 5 so that the outer edge 3 is on a paraboloidal surface. The blades may be less than one complete turn as in Fig. 7, the tangent to the boss through the root and tip being inclined to the radial line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8786/21A GB185146A (en) | 1921-03-22 | 1921-03-22 | Improvements in screw propellers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8786/21A GB185146A (en) | 1921-03-22 | 1921-03-22 | Improvements in screw propellers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB185146A true GB185146A (en) | 1922-08-22 |
Family
ID=9859210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8786/21A Expired GB185146A (en) | 1921-03-22 | 1921-03-22 | Improvements in screw propellers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB185146A (en) |
-
1921
- 1921-03-22 GB GB8786/21A patent/GB185146A/en not_active Expired
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