WO1988006548A1 - Power boat construction system - Google Patents
Power boat construction system Download PDFInfo
- Publication number
- WO1988006548A1 WO1988006548A1 PCT/AU1988/000050 AU8800050W WO8806548A1 WO 1988006548 A1 WO1988006548 A1 WO 1988006548A1 AU 8800050 W AU8800050 W AU 8800050W WO 8806548 A1 WO8806548 A1 WO 8806548A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hull
- core
- craft
- accordance
- reinforcement matrix
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B5/00—Hulls characterised by their construction of non-metallic material
- B63B5/24—Hulls characterised by their construction of non-metallic material made predominantly of plastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B2231/00—Material used for some parts or elements, or for particular purposes
- B63B2231/40—Synthetic materials
- B63B2231/52—Fibre reinforced plastics materials
Definitions
- the present invention relates to the construction of power boats in FRP (Fibre Reinforced Plastic.) and in particular to a a type of construction which enhances the suitability of FRP power boats for mass production.
- FRP Fibre Reinforced Plastic.
- a FRP power boat wherein the principal structural assembly comprising the boat and intended to resist and distribute the various stresses and other forces operating on the boat by reason of its engines and the sea is not the hull but a central core within the hull comprised of two or more modules; the modules defining the bulkheads, floor and sides of the boat and including the engine mounts; the hull being substantially independent from said engine mounts, bulkheads and core generally except for a join between the core and hull adjacent deck level such join being adequate to locate the hull with respect to the core in such a manner that the hull may streamline the bottom of the core and prevent sea water contacting the bottom of the core.
- Figure 1 depicts partially cut away exploded perspective view of a core and hull in accordance with the present invention.
- FIG. 1 depicts a core 1 comprising a foreward module 2, a central engine module 3 and an aft module 4.
- a foreward module 2 In conventional building practice bulkheads are glassed ' into the hull which is a time consuming exercise not capable of being undertaken in an area remote from the hull.
- each of modules 2, 3 and 4 include a bulkhead face.
- Bow module 2 includes bulkhead face 5 which is intended to abut bulkhead face 6 on module 3. These bulkhead faces are glassed (straped) together in order that modules 2 and 3 may become unitary.
- the rear of module 3 and the front of module 4 similarly terminate in a bulkhead face which bulkhead faces are joined to complete the core structure.
- each module includes a bulkhead greatly enhances the rigidity of the module and hence the composite core structure when each complete bulkhead is formed by joining of the two faces.
- Each module may further include, in a unitary manner a deck moulding in order that it may be formed as a complete box section thereby further enhancing rigidity although the embodiment of figure 1 does not rely upon such deck moulding for additional rigidity.
- module 3 contains a well 7 which is intended to carry an engine and this well is provided with engine beds (not shown) in order that it may transfer all of the thrust imparted to the engine(via the propellor shaft)to the core.
- a boatin accordance with the present invention may additionally incorporate a central drainage system comprising a longitudinal tube(not shown)running substantially centrally of th core and underneath the core with branch lines communicating with sinks, showers etc.
- This tube would terminate adjacent the rear of the vessel in a sump (not shown) and be provided with a pump out system.
- This central drain system would also serve to impart additional rigidity to the core comprising the asssembled modules.
- the modules may be fabricated in differring parts of one factory or indeed in separate factories on a production line and not necessarily by shiprights.
- the modules may then be assembled into the core unit quite independentl of fabrication of the hull and the glassing together (straping) of the bulkheads and other parts of the modules will not involve glassing into corners as is the case when a conventional bulkhead is fitted to a hull.
- the glassing of corners is a time consuming exercise.
- the entire core When the entire core is ready it may then be fitted to the hull by fixing means along flange 8 and hull flange 9. It is envisaged that as the core is the basic structural unit of the boat it may be say fifty per cent heavier than conventional FRP mouldings comprising the interior of a boat.
- the hull however may be fabricated so as to be say fifty per cent lighter than that of a normal boat as its purpose is merely to keep the water away from the core and to streamline the underside of the core.
- the hull 9 however will still be subject to pounding and other forces and consequently a light reinforcement matrix 10 is glassed into the hull.
- the reinforcement matrix distributes local stresses within the hull and bearers 13 may also contact the lower portions of core 1.
- Core 1 however is not rigidly affixed to the reinforcement matrix.
- Cushioning material (not shown) may be provided between the core 1 and such bearers 13.
- the core itself is water tight below the line of the gunwaleand could actually be placed in the water and driven through the water by its engines. This is due to the fact that the structural rigidity of the boat is imparted from the core. This is an additional safety feature should a hull be holed or damaged. This feature would additionally facilitate ready replacement of a hull in the case of severe damage as the hull would merely be unbolted from flange 8 and a new hull placed around the core. Such a replacement(which is of course not possible with conventional FRP boats ) • would also be a relatively cheap way of replacing a hull which had succumbed to osmosis. .
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Reinforced Plastic Materials (AREA)
- Moulding By Coating Moulds (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
- Laminated Bodies (AREA)
Abstract
A power boat constructed in fibre reinforced plastic such that the main structural bulk heads (5, 6) are not structurally affixed to the hull (9) but form part of an inner core (1) for the boat such inner core (1) also including engine mounts (3, 7), internal furniture and floor; the hull (9) being attached to the central core adjacent the gunwale (11) but not rigidly affixed thereto at any other point.
Description
POWER BOAT CONSTRUCTION SYSTEM
The present invention relates to the construction of power boats in FRP (Fibre Reinforced Plastic.) and in particular to a a type of construction which enhances the suitability of FRP power boats for mass production. Over the last thirty years there has been a massive swing in the pleasure boat industry towards FRP construction and although many power boat builders are still operating on quite a small scale there are a number of boat building factories throughout the world which are putting great efforts into trying to streamline the production process for FRP power boats in order to try and achieve the economies which flow from mass production in other industries such as the motor industry.
One of the basic problems which inhibits true mass producti of FRP power boats is that all mouldings and fittings must be individually located on the hull. This necessitates a . numbe of tradesmen being present in one confined hull at the same time or alternatively if only one or two tradesmen can work in a hull at any one time the production process is greatly retarded. As the hull of a boat is necessarily quite large and. relatively difficult to move it is also necessary for a tradesmen to bring all his tools to the particular hull being worked on rather than the hull being transported around a factory so as to be handy to the particular tools used by each tradesmen. While some progress has been made in the production of FRP boats by the separate laying up of FRP liners and furniture such that the
anufacture of such furniture may take place in an area remote from the hull there is still the necessity to glass such liners, bulkheads etc to the hull. Glassing individual components to the inside of a hull is a time consuming exercise since the resin in the hull has already set and therefore it is necessary to grind itdom in order that it may bond adequately to" other components which need to be glassed to the hull.
It is the object of the present invention to ameliorate one or more of the abovementioned disadvantages inherent in the design of modern power boats such that the production process may be more streamlined.
According to the present invention there is provided a FRP power boat wherein the principal structural assembly comprising the boat and intended to resist and distribute the various stresses and other forces operating on the boat by reason of its engines and the sea is not the hull but a central core within the hull comprised of two or more modules; the modules defining the bulkheads, floor and sides of the boat and including the engine mounts; the hull being substantially independent from said engine mounts, bulkheads and core generally except for a join between the core and hull adjacent deck level such join being adequate to locate the hull with respect to the core in such a manner that the hull may streamline the bottom of the core and prevent sea water contacting the bottom of the core.
One embodiment of the present invention will now be described with reference to the accompanying drawing in which: Figure 1 depicts partially cut away exploded perspective view of a core and hull in accordance with the present invention.
The embodiment of figure 1 depicts a core 1 comprising a foreward module 2, a central engine module 3 and an aft module 4. In conventional building practice bulkheads are glassed' into the hull which is a time consuming exercise not capable of being undertaken in an area remote from the hull. It will be noted that in accordance with the present invention each of modules 2, 3 and 4 include a bulkhead face. Bow module 2 includes bulkhead face 5 which is intended to abut bulkhead face 6 on module 3. These bulkhead faces are glassed (straped) together in order that modules 2 and 3 may become unitary. The rear of module 3 and the front of module 4 similarly terminate in a bulkhead face which bulkhead faces are joined to complete the core structure. The fact that each module includes a bulkhead greatly enhances the rigidity of the module and hence the composite core structure when each complete bulkhead is formed by joining of the two faces. Each module may further include, in a unitary manner a deck moulding in order that it may be formed as a complete box section thereby further enhancing rigidity although the embodiment of figure 1 does not rely upon such deck moulding for additional rigidity. It should be appreciated
that module 3 contains a well 7 which is intended to carry an engine and this well is provided with engine beds (not shown) in order that it may transfer all of the thrust imparted to the engine(via the propellor shaft)to the core. As one of the advantages of constructing a boat in accordance with the present invention is the avoidance of a time consuming step of fitting bulkheads and other fittings to the hull a boatin accordance with the present invention may additionally incorporate a central drainage system comprising a longitudinal tube(not shown)running substantially centrally of th core and underneath the core with branch lines communicating with sinks, showers etc. This tube would terminate adjacent the rear of the vessel in a sump (not shown) and be provided with a pump out system. This central drain system would also serve to impart additional rigidity to the core comprising the asssembled modules.
It will be appreciated that the modules may be fabricated in differring parts of one factory or indeed in separate factories on a production line and not necessarily by shiprights. The modules may then be assembled into the core unit quite independentl of fabrication of the hull and the glassing together (straping) of the bulkheads and other parts of the modules will not involve glassing into corners as is the case when a conventional bulkhead is fitted to a hull. The glassing of corners is a time consuming exercise. When the entire core is ready it may then be fitted to the hull by fixing means along flange 8 and hull flange 9.
It is envisaged that as the core is the basic structural unit of the boat it may be say fifty per cent heavier than conventional FRP mouldings comprising the interior of a boat. The hull however may be fabricated so as to be say fifty per cent lighter than that of a normal boat as its purpose is merely to keep the water away from the core and to streamline the underside of the core. The hull 9 however will still be subject to pounding and other forces and consequently a light reinforcement matrix 10 is glassed into the hull. The reinforcement matrix distributes local stresses within the hull and bearers 13 may also contact the lower portions of core 1. Core 1 however is not rigidly affixed to the reinforcement matrix. Cushioning material (not shown) may be provided between the core 1 and such bearers 13. There will of course be the necessity for a stern tube and possibly toilet fittings passing between the core and the hull and the ingress of water into the area between the hull and core will be avoided at these points by the inclusion of flexible boots (not shown). In order to provide for the uptake of sea water for cleaning purposes and otherwise
into the vessel it is also possible in this embodiment to provide one or more holes (not shown) in the hull which holes communicate with the channels formed between the reinforcement matrix 10 and the hull 9 when the reinforcement matrix is glassed in place. In this manner that part of the reinforcement matrix below the water line would be permanently filled with water which may be tapped at any point on the reinforcement matrix below the water line and in particular it may be conveniently tapped on one of the vertical members comprising the matrix along the side such as 12. In this manner the provision of a skin fitting on the hull is avoided.
In this embodiment the core itself is water tight below the line of the gunwaleand could actually be placed in the water and driven through the water by its engines. This is due to the fact that the structural rigidity of the boat is imparted from the core. This is an additional safety feature should a hull be holed or damaged. This feature would additionally facilitate ready replacement of a hull in the case of severe damage as the hull would merely be unbolted from flange 8 and a new hull placed around the core. Such a replacement(which is of course not possible with conventional FRP boats ) • would also be a relatively cheap way of replacing a hull which had succumbed to osmosis. .
Further economies are encountered when a boat is constructed in accordance with the embodiment of figure 1 as it is not necessary to flow coat the inside of a hull.
It should be appreciated that whilst not departing from the basic concept of a core substantially irdepa lent from thehull endvhidi imparts most of the structural rigidity to a boat it is possible to devise other embodiments apart from that above described without departing from the scope of the present invention.
Claims
The claims defining the invention are as follows: 1. An FRP power boat comprising a substantially FRP core incorporating one or more main structural bulkheads, the ensiremounts and the majority of the floor and internal furniture of the craft; a hull for streamlining such core and a deck; the main structural bulkheads of the craft not being stru^tually affixed to thehullalong their lower peripheral portions but the only substantial stress carrying join between the hull and core occurring adjacent the gunwale of the craft.
2. A craft in accordance with claim 1 wherein the hull is reinforced by a reinforcement matrix being bonded thereto.
3. A craft in accordance with claim 2 hereof wherein the reinforcement matrix contacts lower portions of the core but is not rigidly affixed thereto.
4. A craft in accordance with claim 3 hereof wherein cushioning material is provided between the reinforcement matrix and those areas of the core which contact the reinforcement matrix.
5. A craft in accordance with any one of claims 2-4 wherein the core itself is watertight up to the waterline without the assistance of a hull with the exception of apertures provided for through hull services.
6. A craft in accordance with any one of claims 2-5 wherein the reinforcement matrix is at least in part hollow in order that it may act as a conduit or storage area for liquids passing between the core, the matrix and/or the sea.
7. A craft in accordance with any one of the preceding claims wherein the only structural join between the core and hull is at the gunwale whereat an externally directed flange on the core is placed against a corresponding internally or externally directed flange around the upper peripheral portions of the hull.and fixed thereto.
8. A power boat substantially as described herein with reference to the accompanying drawings.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019880701344A KR890700510A (en) | 1987-02-25 | 1988-02-25 | Motorized boat drying system |
DK591988A DK591988A (en) | 1987-02-25 | 1988-10-25 | PROCEDURE FOR THE PREPARATION OF A MOTOR BOAT |
NO884745A NO884745L (en) | 1987-02-25 | 1988-10-25 | CONSTRUCTION SYSTEM FOR SPEED MOTOR BOATS. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPI0519 | 1987-02-25 | ||
AUPI051987 | 1987-02-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1988006548A1 true WO1988006548A1 (en) | 1988-09-07 |
Family
ID=3772031
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU1988/000050 WO1988006548A1 (en) | 1987-02-25 | 1988-02-25 | Power boat construction system |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0303665A4 (en) |
JP (1) | JPH01502896A (en) |
KR (1) | KR890700510A (en) |
AU (1) | AU618250B2 (en) |
WO (1) | WO1988006548A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999032351A1 (en) * | 1997-12-22 | 1999-07-01 | Eero Aikio | A method of making a boat, and a boat |
US6244206B1 (en) * | 1999-08-17 | 2001-06-12 | Genmar Logic, Llc | Structural system for a molded boat hull |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04278895A (en) * | 1991-03-05 | 1992-10-05 | Toyota Motor Corp | Shipbuilding method |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1187283A (en) * | 1957-11-26 | 1959-09-09 | Advanced plastic boat | |
FR1292453A (en) * | 1961-05-17 | 1962-05-04 | Paul Blotto Ets | Further training in the construction of polyester boats |
US3372408A (en) * | 1966-03-11 | 1968-03-12 | Luger Ind Inc | Sectional boat structure |
US3531809A (en) * | 1968-10-11 | 1970-10-06 | Larson Ind Inc | Plastic boat construction |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3315284A (en) * | 1965-10-11 | 1967-04-25 | Roy S Ludlow | Boat construction |
US3663976A (en) * | 1970-01-20 | 1972-05-23 | Winner Boats | Grillage for a boat |
US3871043A (en) * | 1973-12-05 | 1975-03-18 | Delhi Manufacturing Company | Boat structure |
-
1988
- 1988-02-25 JP JP63501790A patent/JPH01502896A/en active Pending
- 1988-02-25 KR KR1019880701344A patent/KR890700510A/en not_active Application Discontinuation
- 1988-02-25 EP EP19880902080 patent/EP0303665A4/en not_active Withdrawn
- 1988-02-25 AU AU12509/88A patent/AU618250B2/en not_active Ceased
- 1988-02-25 WO PCT/AU1988/000050 patent/WO1988006548A1/en not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1187283A (en) * | 1957-11-26 | 1959-09-09 | Advanced plastic boat | |
FR1292453A (en) * | 1961-05-17 | 1962-05-04 | Paul Blotto Ets | Further training in the construction of polyester boats |
US3372408A (en) * | 1966-03-11 | 1968-03-12 | Luger Ind Inc | Sectional boat structure |
US3531809A (en) * | 1968-10-11 | 1970-10-06 | Larson Ind Inc | Plastic boat construction |
Non-Patent Citations (3)
Title |
---|
PATENTS ABSTRACTS OF JAPAN, M 153, page 35, UP,A, 57-80980 (Yamaha Hatsudoki K.K.) 20 May 1982 (20.05.82) * |
PATENTS ABSTRACTS OF JAPAN, M 46, page 78, JP,A, 55-127274 (Yamaha Hatsudoki K.K.) 1 October 1980 (01.10.80) * |
See also references of EP0303665A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999032351A1 (en) * | 1997-12-22 | 1999-07-01 | Eero Aikio | A method of making a boat, and a boat |
US6244206B1 (en) * | 1999-08-17 | 2001-06-12 | Genmar Logic, Llc | Structural system for a molded boat hull |
Also Published As
Publication number | Publication date |
---|---|
AU1250988A (en) | 1988-09-01 |
JPH01502896A (en) | 1989-10-05 |
AU618250B2 (en) | 1991-12-19 |
EP0303665A4 (en) | 1989-06-13 |
KR890700510A (en) | 1989-04-25 |
EP0303665A1 (en) | 1989-02-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5036789A (en) | Jet ski hull and method of manufacture | |
US8656856B1 (en) | Collapsible personal catamaran | |
US2866985A (en) | Plastic boat | |
US3790977A (en) | Hull construction for watercraft | |
US3747550A (en) | Plastic sailboat body and keel assembly | |
US3531809A (en) | Plastic boat construction | |
US3315284A (en) | Boat construction | |
US4365580A (en) | Hull construction | |
KR20120080780A (en) | Trimaran type semi-submarine | |
JPH0328356B2 (en) | ||
US6860221B1 (en) | Tubular boat having modular construction | |
US6763777B1 (en) | Conversion cockpit for a sailboat | |
US3611461A (en) | Single person shell and method | |
US11459064B1 (en) | Hull of a watercraft | |
CA1125429A (en) | Slamming-resistant sonar dome canoe | |
US2721341A (en) | Dual-welt plastic ship | |
WO1988006548A1 (en) | Power boat construction system | |
US5184566A (en) | Buoyant boat with girder box | |
US5481998A (en) | Recreational boat construction | |
US5634425A (en) | Boat hull including moulded shell structure | |
AU2007200791A1 (en) | Boat construction method | |
US5666902A (en) | Moulded boat hull with integrally contained reinforced inserts | |
US20230278267A1 (en) | Unitary boat hull and methods of manufacture | |
US3044083A (en) | Method of manufacturing planing hulls | |
JPH02169385A (en) | Hull construction |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): DK JP KR NO US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE FR GB IT LU NL SE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1988902080 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1988902080 Country of ref document: EP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1988902080 Country of ref document: EP |