GB2177666A - Propulsion means for water craft - Google Patents
Propulsion means for water craft Download PDFInfo
- Publication number
- GB2177666A GB2177666A GB08506821A GB8506821A GB2177666A GB 2177666 A GB2177666 A GB 2177666A GB 08506821 A GB08506821 A GB 08506821A GB 8506821 A GB8506821 A GB 8506821A GB 2177666 A GB2177666 A GB 2177666A
- Authority
- GB
- United Kingdom
- Prior art keywords
- craft
- propeller
- water
- duct
- water craft
- 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.)
- Withdrawn
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 43
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
- B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
- B63H5/14—Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in non-rotating ducts or rings, e.g. adjustable for steering purpose
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
- F02B61/04—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers
- F02B61/045—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers for marine engines
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Toys (AREA)
Abstract
A water craft 1 having a longitudinal tunnel 3, below the water line, housing a driven multiple-turn screw propeller 4 on a longitudinal axis for propelling the craft. The screw is preferably multiple-start. The propeller is driven by an outboard motor 8. <IMAGE>
Description
SPECIFICATION
Improvements in or relating to propulsion means for water craft
Description of the invention
This invention relates to water craft and to propulsion means therefor.
The conventional propulsion means for powered water craft is the screw propeller. The present invention provides alternative propulsion means.
Short description of the drawings
In order that the invention may be carried into practice, one embodiment will now be described, by way of example only, with reference to the accompanying drawings, in which:
Figure 1 is a diagrammatic section on the longitudinal axis of a water craft, showing the power means and propulsion means in side elevation; and
Figure 2 is the rear end elevation of the water craft of Figure 1.
Description of the example
Referring to the accompanying drawings, a water craft 1 is shown in section in Figure 1 and in end elevation in Figure 2. The water line is shown at 2 in both Figures.
Beneath the craft 1, in this example on the fore and aft axis, is a cylindrical duct 3 housing a propeller 4. The propeller 4 of the example of Figure 1 is a curved blade secured to and wound helically around a drive shaft 5.
The propulsion means may take a number of alternative forms, discussed later herein, but for the present description, it should be noted that the propeller may be a single-start helix, as shown in
Figure 1, or a multiple-start helix, as shown in Figure 2.
The drive shaft 5 is carried centrally of the duct 3 by a forward bearing 6 and a rearward bearing 7, shown in Figure 1.
An outboard motor 8 is mounted at the rear of the craft 1 and is provided with the customary vertical drive shaft and housing shown at 9. At the lower end of the housing 9, the drive shaft, shown at 5' in Figure 1, is turned forwardly and is connected by any suitable means, not shown in the drawings, to the propeller drive shaft 5.
The propeller 4 is driven by the motor 8 in the direction which causes rotation of the blade in the sense to take in water at the front of the duct 3 and force it as a jet from the rear, as indicated by the arrows 10 of Figure 1, for forward motion of the craft 1. For rearward motion of the craft 1, the drive shaft 5 is driven in reverse direction by conventional reverse gearing in the drive of the motor 8. The craft 1, in this example, is steered by a conventional rudder, not shown in the drawings.
It is preferred to provide guards at the front and rear of the duct 3, to prevent the intake of debris suspended in the water, during either sense of rotation of the drive shaft 5.
As indicated earlier herein, a number of alternative arrangements of the propulsion means of the invention are possible, besides that of the specific embodiment described. The propeller 4 blade, instead of being continuous between the forward bearing 6 and the rearward bearing 7 may be divided into sections, to provide for one or more intermediate bearings.
Instead of the single axial duct 3 shown in Figure 1, two ducts, one on each side of the axis may be provided. These may then be of shorter length.
The outboard motor, shown in the example of the drawings, is particularly applicable to small craft. Large craft may be provided with an inboard motor. In such case, the drive shaft passes to the exterior of the craft through a watertight bearing.
1. A water craft having a longitudinai duct, below the water line, housing a propeller on a iongitudinal axis, for propelling the craft when the said propeller is driven.
2. A water craft as claimed in Claim 1, in which the propeller is a multiple-turn screw.
3. A water craft as claimed in Claim 2, in which the propeller is a multiple-start screw.
4. A water craft as claimed in any one of the preceding claims, in which the said duct and said propeller extend for at least the major length of the fore-to-aft axis of the craft.
5. A water craft as claimed in any one of the preceding claims, in which the said duct is of circular internal cross-section.
6. A water craft as claimed in any one of the preceding claims, in which the duct is provided with an apertured debris guard at least at its front end.
7. A water craft as claimed in any one of the preceding claims, in which the said propeller is adapted to be driven, by a drive external to the craft.
8. A water craft as claimed in Claim 7, in which the said propeller has a drive from an outboard motor.
9. A water craft as claimed in any one of the preceding claims, in which the said duct and propeller are wholly external to the craft shell.
10. A water craft as claimed in Claim 1, constructed substantially as described herein with reference to the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (10)
1. A water craft having a longitudinai duct, below the water line, housing a propeller on a iongitudinal axis, for propelling the craft when the said propeller is driven.
2. A water craft as claimed in Claim 1, in which the propeller is a multiple-turn screw.
3. A water craft as claimed in Claim 2, in which the propeller is a multiple-start screw.
4. A water craft as claimed in any one of the preceding claims, in which the said duct and said propeller extend for at least the major length of the fore-to-aft axis of the craft.
5. A water craft as claimed in any one of the preceding claims, in which the said duct is of circular internal cross-section.
6. A water craft as claimed in any one of the preceding claims, in which the duct is provided with an apertured debris guard at least at its front end.
7. A water craft as claimed in any one of the preceding claims, in which the said propeller is adapted to be driven, by a drive external to the craft.
8. A water craft as claimed in Claim 7, in which the said propeller has a drive from an outboard motor.
9. A water craft as claimed in any one of the preceding claims, in which the said duct and propeller are wholly external to the craft shell.
10. A water craft as claimed in Claim 1, constructed substantially as described herein with reference to the accompanying drawings.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08506821A GB2177666A (en) | 1985-03-15 | 1985-03-15 | Propulsion means for water craft |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08506821A GB2177666A (en) | 1985-03-15 | 1985-03-15 | Propulsion means for water craft |
Publications (2)
Publication Number | Publication Date |
---|---|
GB8506821D0 GB8506821D0 (en) | 1985-04-17 |
GB2177666A true GB2177666A (en) | 1987-01-28 |
Family
ID=10576079
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08506821A Withdrawn GB2177666A (en) | 1985-03-15 | 1985-03-15 | Propulsion means for water craft |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2177666A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999041498A1 (en) * | 1998-02-13 | 1999-08-19 | Adolfo Gonzalez Perez | Universal hydraulic and wind turbine, and applications |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB371224A (en) * | 1931-07-07 | 1932-04-21 | Willman Ielvid Miller | Improvements in propellers |
GB386913A (en) * | 1931-10-23 | 1933-01-26 | Willy Albrecht | Improvements in and relating to the propulsion of high-speed ships |
GB632499A (en) * | 1946-04-10 | 1949-11-28 | Alfred Pace | Device for improving the propeller efficiency of ships |
GB1033234A (en) * | 1963-06-26 | 1966-06-22 | Justinien Marcel | Improvements in or relating to a buoyancy device for a surface watercraft |
GB1335845A (en) * | 1971-05-19 | 1973-10-31 | Mackenzie W | Axial screw type marine impeller combining axial flow with centrifugal throw |
GB1362694A (en) * | 1971-05-13 | 1974-08-07 | White & Co Ltd Samuel | Ship retarding system |
GB1416531A (en) * | 1972-01-14 | 1975-12-03 | Whittle A | Hydrofoil craft |
-
1985
- 1985-03-15 GB GB08506821A patent/GB2177666A/en not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB371224A (en) * | 1931-07-07 | 1932-04-21 | Willman Ielvid Miller | Improvements in propellers |
GB386913A (en) * | 1931-10-23 | 1933-01-26 | Willy Albrecht | Improvements in and relating to the propulsion of high-speed ships |
GB632499A (en) * | 1946-04-10 | 1949-11-28 | Alfred Pace | Device for improving the propeller efficiency of ships |
GB1033234A (en) * | 1963-06-26 | 1966-06-22 | Justinien Marcel | Improvements in or relating to a buoyancy device for a surface watercraft |
GB1362694A (en) * | 1971-05-13 | 1974-08-07 | White & Co Ltd Samuel | Ship retarding system |
GB1335845A (en) * | 1971-05-19 | 1973-10-31 | Mackenzie W | Axial screw type marine impeller combining axial flow with centrifugal throw |
GB1416531A (en) * | 1972-01-14 | 1975-12-03 | Whittle A | Hydrofoil craft |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999041498A1 (en) * | 1998-02-13 | 1999-08-19 | Adolfo Gonzalez Perez | Universal hydraulic and wind turbine, and applications |
ES2156475A1 (en) * | 1998-02-13 | 2001-06-16 | Perez Adolfo Gonzalez | Universal hydraulic and wind turbine, and applications |
Also Published As
Publication number | Publication date |
---|---|
GB8506821D0 (en) | 1985-04-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |