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)
• Laying Of Electric Cables Or Lines Outside (AREA)
• Laminated Bodies (AREA)
• Moulding By Coating Moulds (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=3772031

Family Applications (1)

Country Status (5)

Families Citing this family (3)

Family Cites Families (7)

• 1988
  • 1988-02-25 JP JP63501790A patent/JPH01502896A/ja active Pending
  • 1988-02-25 AU AU12509/88A patent/AU618250B2/en not_active Ceased
  • 1988-02-25 EP EP19880902080 patent/EP0303665A4/de not_active Withdrawn
  • 1988-02-25 WO PCT/AU1988/000050 patent/WO1988006548A1/en not_active Ceased
  • 1988-02-25 KR KR1019880701344A patent/KR890700510A/ko not_active Withdrawn

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