GB404631A - Improvements in and relating to screw propeller blades and the like - Google Patents
Improvements in and relating to screw propeller blades and the likeInfo
- Publication number
- GB404631A GB404631A GB13564/32A GB1356432A GB404631A GB 404631 A GB404631 A GB 404631A GB 13564/32 A GB13564/32 A GB 13564/32A GB 1356432 A GB1356432 A GB 1356432A GB 404631 A GB404631 A GB 404631A
- Authority
- GB
- United Kingdom
- Prior art keywords
- axis
- distances
- blade
- base
- plotted
- 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
Abstract
404,631. Screw propellers. ROSS, C. H. A. F. L., 1619, Massachusetts Avenue, Washington, U.S.A. May 11, 1932, No. 13564. [Class 114.] In the manufacture of a screw propeller blade the determination of points on the driving surfaces thereof is obtained from a projection of the blade shape on a plane at right angles to the axis of rotation and both the helix angle of a circular section and the leading and trailing points are obtained from a diagram having the propeller axis as a vertical axis of reference along which are plotted distances representing angular displacement from a radially-disposed base-like whilst a horizontal axis represents radial distances. In addition the radial distances are plotted so that the resulting sections do not overlap. Fig. 1 represents the projection of a blade upon a plane at right angles to the propeller axis and from an arbitrary base-line radial to the axis circular arcs are marked with degrees showing the distances of the leading and trailing edges from the base-line. In setting out the helix angle, a method indicated in Fig. 5 is adopted, wherein the base-line represents three times the radius, the starting point A is fixed at a distance R from the origin and the vertical distance is the pitch divided by #. Other vertical distances are plotted proportionately thereto to represent angles whereby the leading and trailing points, which for example are 17‹ and 74‹ at radius 4<11>, of each section is determined. The driving face of sections at radii 2-10 as obtained from Fig. 5 are shown in Fig. 2 imposed on one diagram. Having thus determined the sections of the driving face, the blade is machined along circular arcs to correspond. A construction is also given for use with curved rear faces whereby the centre is determined in relation to the straight driving face, and the machining tool is set in accordance therewith. Specifications 376,674 and 381,751, [both in Group XXIII], are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB13564/32A GB404631A (en) | 1932-05-11 | 1932-05-11 | Improvements in and relating to screw propeller blades and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB13564/32A GB404631A (en) | 1932-05-11 | 1932-05-11 | Improvements in and relating to screw propeller blades and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB404631A true GB404631A (en) | 1934-01-11 |
Family
ID=10025225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13564/32A Expired GB404631A (en) | 1932-05-11 | 1932-05-11 | Improvements in and relating to screw propeller blades and the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB404631A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170274971A1 (en) * | 2016-03-25 | 2017-09-28 | Indigo Power Systems Llc | Marine propeller |
-
1932
- 1932-05-11 GB GB13564/32A patent/GB404631A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170274971A1 (en) * | 2016-03-25 | 2017-09-28 | Indigo Power Systems Llc | Marine propeller |
| US10710688B2 (en) * | 2016-03-25 | 2020-07-14 | Indigo Power Systems, LLC | Marine propeller |
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