GB2449245A - Flat bottomed craft with wedge shaped member at the stern - Google Patents
Flat bottomed craft with wedge shaped member at the stern Download PDFInfo
- Publication number
- GB2449245A GB2449245A GB0709205A GB0709205A GB2449245A GB 2449245 A GB2449245 A GB 2449245A GB 0709205 A GB0709205 A GB 0709205A GB 0709205 A GB0709205 A GB 0709205A GB 2449245 A GB2449245 A GB 2449245A
- Authority
- GB
- United Kingdom
- Prior art keywords
- craft
- propeller
- wedge shaped
- stern
- shaped member
- 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.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000003365 glass fiber Substances 0.000 claims abstract description 3
- 229910052751 metal Inorganic materials 0.000 claims abstract description 3
- 239000002184 metal Substances 0.000 claims abstract description 3
- 150000002739 metals Chemical class 0.000 claims abstract description 3
- 238000010276 construction Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims 1
- 101100390735 Mus musculus Figla gene Proteins 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
- B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
- B63B1/04—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with single hull
- B63B1/08—Shape of aft part
-
- 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
- B63H5/125—Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction, e.g. podded azimuthing thrusters
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Harvesting Machines For Specific Crops (AREA)
Abstract
Disclosed is the steering and driving of a flat bottomed watercraft by replacing the use of a non steering propeller and rudder with that of an outboard motor, whilst protecting the lower part of the outboard motor and its propeller from debris and the ground beneath the craft. The flat bottomed craft has a wedge shaped member mounted on the flat bottom of the craft, which reduces in cross-section towards a centerline of the craft as it extends towards the stern of the craft and terminates in line with the transom of the craft, where the outboard may be mounted. The wedge shaped member may be constructed using glass fibre, timber or rigid metals of any type in sheet form joined at the seams. The wedge shaped member directs water through the rotating propeller of the outboard while protecting the propeller from impact. Water is forced through the rotating propeller, which is then steered directly or indirectly either side of the wedge shaped member to maneuver the craft in the desired direction.
Description
DESCRIPTION
Steering and driving a flat bottomed water craft using an outboard motor, whilst protecting the propeller from debris and the ground beneath the craft, removing the need of a rudder and non steering propeller.
This is done by directing the forcing water travelling through the rotating propeller down each side of a constructed wedge shape beneath the water level at the rear of the craft and by directing the water away, this wedge shape shall be titled the Lower hind.
This configuration involves the mounting of a conventional outboard motor to a mounting point at the rear of the craft and the pilot controlling the said outboard motor with a steering wheel or fixed bar and control lever in the normal way.
The design shape is constructed using Glass fibre, Timber or rigid Metals of all types in sheet form joined at the seems as shown in figi, fig2 and fig3, so that the propeller of the used outboard motor is located to the centre in width and height to the Lower hind and that this Lower hind is constructed lower in depth than that of the outboard motor as shown in fig3 at fig4a thus protecting the propeller from making contact with debris or the ground beneath the craft.
The design shape of the construction is shown in figi and fig2 where the mounting point for the outboard motor figla is a flat vertical surface with a top ledge on which to attach the outboard motor fixing.
Also shown in figi, flg2 and flg3, is that the Lower hind fig4a is a wedge shape construction beneath the outboard motor mounting point, with a flat bottom equal to the bottom of the craft and the rear vertical wedge extremity is equal to that of the outboard motor mounting point shown as fig laThe water level for the craft is shown as fig3a.
Whilst in straight forward motion, water is pulled each side of the Lower hind through the rotating propeller and is forced away from the rear of the craft as shown in fig4 at fig 4a, thus pushing the craft forward which allows more water to be taken down each side of the Lower hind to repeat the process with the arrows depicting the water flow.
Should the pilot engage reverse gear the propeller of the outboard motor will begin to rotate in the opposite direction and as shown in fig5 by the arrows depicting the water flow the water is pulled towards the rear of the craft through the rotating propeller of the outboard motor and is forced down each side of the Lower hind fig4a causing the craft to come to a halt, should the pilot continue with this manoeuvre the craft will begin to travel astern and vice versa should the craft have started the manoeuvre whilst travelling astern.
Should the pilot wish to steer the craft whilst travelling forward he/she would by use of the steering control, steer the outboard motor propeller in the opposite direction to which the craft needed to be steered, as shown in fig6 the outboard motor propeller has been steered into the anti clockwise position whilst travelling forward therefore pulling water from the left side of the Lower hind fig 4a through the rotating propeller and away from the rear of the craft forcing the left side of the Lower hind in the clockwise motion and in turn the front of the craft the same way and vice versa should the pilot wish to steer in the opposite direction.
Assuming the pilot had engaged reverse gear as in fig5 and needs to move the rear of the craft anti clockwise he/she would also steer the outboard motor propeller into the anti clockwise position using the steering control, this will then pull water towards the rear of the craft through the rotating propeller and pushing it down the left side of the Lower hind as shown in fig7 at fig4a with the arrows depicting the water flow, causing the rear of the craft to move anti clockwise in the reverse direction pulling the front of the craft the same way and vice versa had the outboard motor propeller been steered into the clockwise position.
Claims (4)
1. A stern of a flat bottomed water craft comprising a mounting point as a means of attaching an outboard motor, a wedge shaped lower hind with an extremity at the rear equal to that of the afore said mounting point.
2. A stern of a flat bottomed water craft according to claim I, in which the design shape of the construction will allow the use of an outboard motor for propulsion, steering and stopping rather than an inboard engine with a non steering propeller and rudder.
3. A stern of a flat bottomed water craft according to claim 2, in which the design shape of the COflSjofl will protect the lower part of the affixed outboard motor and its propeller from debris and the ground beneath the craft
4. A stern of a flat bottomed water craft according to any of the preceding claims, in which the material used for the COnStrUCtIOn is Glass fibre, Timber or rigid Metals of all types in sheet form joined at the seems.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0709205A GB2449245B (en) | 2007-05-12 | 2007-05-12 | A flat bottomed watercraft with a tapering lower hull section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0709205A GB2449245B (en) | 2007-05-12 | 2007-05-12 | A flat bottomed watercraft with a tapering lower hull section |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0709205D0 GB0709205D0 (en) | 2007-06-20 |
| GB2449245A true GB2449245A (en) | 2008-11-19 |
| GB2449245B GB2449245B (en) | 2011-08-03 |
Family
ID=38219339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0709205A Expired - Fee Related GB2449245B (en) | 2007-05-12 | 2007-05-12 | A flat bottomed watercraft with a tapering lower hull section |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2449245B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB477241A (en) * | 1937-02-23 | 1937-12-24 | Peter Keay | Improvements in hull contour for power-driven boats |
| US2167688A (en) * | 1935-07-15 | 1939-08-01 | Andrew A Scowley | Hull for boats and ships |
| GB1496670A (en) * | 1973-12-29 | 1977-12-30 | Yamaha Motor Co Ltd | Planing hulls |
| GB1515303A (en) * | 1974-05-23 | 1978-06-21 | Pilgrim Eng Dev | Ships' stern construction |
-
2007
- 2007-05-12 GB GB0709205A patent/GB2449245B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2167688A (en) * | 1935-07-15 | 1939-08-01 | Andrew A Scowley | Hull for boats and ships |
| GB477241A (en) * | 1937-02-23 | 1937-12-24 | Peter Keay | Improvements in hull contour for power-driven boats |
| GB1496670A (en) * | 1973-12-29 | 1977-12-30 | Yamaha Motor Co Ltd | Planing hulls |
| GB1515303A (en) * | 1974-05-23 | 1978-06-21 | Pilgrim Eng Dev | Ships' stern construction |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0709205D0 (en) | 2007-06-20 |
| GB2449245B (en) | 2011-08-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20190512 |