US3296992A - Ships - Google Patents

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Publication number
US3296992A
US3296992A US411519A US41151964A US3296992A US 3296992 A US3296992 A US 3296992A US 411519 A US411519 A US 411519A US 41151964 A US41151964 A US 41151964A US 3296992 A US3296992 A US 3296992A
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United States
Prior art keywords
hulls
hull
starboard
port
ship
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Expired - Lifetime
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US411519A
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English (en)
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Lackenby Harrison
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Individual
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Individual
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    • 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
    • B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
    • B63B1/12—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected rigidly

Definitions

  • An object of the present invention is to provide a ship having a plurality of hulls so spaced apart in the athwartships direction and relatively staggered in the fore-and-aft direction, and so shaped relative to one another, that the surface wave systems between the hulls are similar but offset from one another in the longitudinal direction, or phased, so as to produce favourable interference and a reduction in the wave-making component of resistance to progress of the ship, while the extreme port and starboard hull surfaces are flat so as not to produce any wave systems or any wave-making resistance.
  • FIGS. 1 to 4 are plan views of ships according to the invention with hulls shown in full outline and interconnecting decks in broken outlines, the direction of forward motion being represented in each case by the arrow A.
  • a ship comprises three hulls 12, 14 and 16 spaced apart in the athwartships direction and interconnected by a common deck 18, the central hull 14 being forward of the other two.
  • the central hull 14 may correspond in form to a conventional hull in so far as are concerned both underwater and immediately above water.
  • the two side hulls 12 and 16 equally spaced on either side of the central hull and staggered relative thereto in the aftwards direction, are rigidly connected to the central hull by means of the common deck or other connecting structure.
  • the side hulls 12 and 16 are each generally similar to one half of the main central hull 14 considering the latter divided along its central vertical plane, the right-hand half being on the port side of the central hull and the left-hand half on the starboard side of the main hull.
  • the sterns 2t) and 22 of the two side hulls 12 and 16 are aft of the stern 24 of the main central hull 14 by a like amount, and the outboard flat surfaces 26 and 28 of the side hulls are, of course, plated over to preserve their buoyancy and produce generally flat surfaces.
  • a special feature of the invention is the relative fore and aft position of the central bows 30 and 32 and the side hulls bows 34 and 36.
  • the bows of the side hullsthe port hull 12 has a starboard bow 34 and the starboard hull 16 has a port bow 36-are set aft of the bows 3t) and 32 of the main central hull 14 such that the wave system set up by the bows of the central hull is largely cancelled out by the favourable interference of the wave systems set up by the bows of the side hulls.
  • the object of this is to reduce the wavemaking resistance of the three-hull combination and thereby to assist in its passage through the water.
  • Propulsion may be effected by sail, or by means of a screw propeller or screw propellers fitted at the stern of the central hull, or at the stern of each of the side hulls, or on all three hulls.
  • the screw propellers may be fitted on suitable supports arranged in the two interspaces between the central and side hulls.
  • the ship may be steered by more or less conventional rudders at the after end of either the central or side hulls or both.
  • rudders suitably supported may be fitted in the interspaces between the central and side hulls, more especially if the screw propellers are to be fitted in the interspaces. If necessary, in order to improve manoeuvrability and steering, a small amount of longitudinal curvature could be introduced into the fiat vertical sides of the outside half hulls.
  • the central and side hulls would be suitably subdivided by transverse and other bulkheads as necessary to preserve watertight integrity in case of breaching.
  • the side and central hulls could be of normal or of simplified construction.
  • a ship 40 comprises two transversely-spaced half hulls 42 and 44 (similar to the half hulls 12 and 16 of FIG. I) joined by a common deck 46.
  • the two half-hulls are displaced relative to one another in the fore-and-aft direction, the starboard hull 44 being forward of the port hull 42, for the same reason as given for the three-hull system of FIG. 1, namely favourably interference of the wave systems generated by the inboard sides of the two hulls.
  • the ship may be equipped for propulsion by sail, or by one or more screw propellers.
  • FIG. 3 this illustrates a modification of the FIG. 1 construction.
  • the side hulls 50 and 52 are forward of the central hull 54 by the same amount as previously aft, again to effect favourable interference of the wave systems generated by the bows 56 and 58 of the central hull 54 and those generated by the bows 60 and 62 of the adjacent side hulls 50 and 52.
  • the hull-interconnecting deck is denoted 64.
  • FIG. 4 this illustrates a modification of the FIG. 2 construction.
  • the port hull 72 is forward of the starboard hull 74.
  • the hull-interconnecting deck is denoted 76.
  • FIGS. 3 and 4 could be equipped for propulsion as described with reference to FIGS. 1 and 3, respectively.
  • the hulls have been interconnected by a single deck. It will be manifest, however, that there could be more than one interconnecting deck; for example, decks could be arranged in tiers and be suitably supported one above the other, with superstructures as necessary.
  • a ship comprising three hulls spaced apart in the athwartships direction and relatively staggered in the foreand-aft direction, and deck means interconnecting said hulls, the port and starboard hulls corresponding in shape and size to starboard and port halves, respectively, of the central hull considered as divided longitudinally along its central vertical plane, said port and starboard hulls, thus having mutually-remote flat outer sides and single starboard and port bows, respectively, and the relative positions of adjacent bows being such that the bows of the port and starboard hulls are spaced in a fore-and-aft direotion relative to the bow of the central hull a distance more than one-third and less than one-half the length of said central hull, whereby, when the ship is in motion, the wave systems generated by adjacent curved hull surfaces are phased so as to interfere favourably with one another and so reduce the wave-making component of resistance to progress of the ship.
  • a ship comprising two hulls spaced apart in the athwartships direction and relatively staggered in the foreand-aft direction, and deck means interconnecting said hulls, said hulls corresponding in shape and size to starboard and port halves, respective1y,,of the hull of a singlehulled ship divided longitudinally along its central vertical plane and thus having mutually-remote flat outer sides and single starboard and pont bows, respectively, and the relative positions of adjacent bows being such that the bows of the port and starboard hulls are spaced in a fore-and-aft direction relative to each other a distance more than one-third and less than one-half the length of said hulls, whereby, when the ship is in motion, the wave systems generated by the adjacent curved hull surfaces are phased so as to interfere favourably with one another and so reduce the wave-making component of resistance to progress of the ship.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Toys (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Vibration Prevention Devices (AREA)
US411519A 1963-11-25 1964-11-16 Ships Expired - Lifetime US3296992A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4646263 1963-11-25

Publications (1)

Publication Number Publication Date
US3296992A true US3296992A (en) 1967-01-10

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ID=10441371

Family Applications (1)

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US411519A Expired - Lifetime US3296992A (en) 1963-11-25 1964-11-16 Ships

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US (1) US3296992A (es)
ES (1) ES306367A1 (es)
GB (1) GB1052497A (es)
NL (1) NL6413568A (es)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995575A (en) * 1972-08-10 1976-12-07 Jones Jr Allen Semidisplacement hydrofoil ship
US4130078A (en) * 1975-01-06 1978-12-19 Institut Francais Du Petrole Floating device connected to a ship, for towing a submerged member with a lateral shift thereof with respect to the ship route
US5211126A (en) * 1992-05-18 1993-05-18 Johnson Robert K Ship or boat construction having three hulls
WO1994020359A1 (en) * 1993-03-11 1994-09-15 Wintria Ab Ship comprising a displacement central hull and two side hulls
WO1997010988A1 (en) * 1995-09-20 1997-03-27 Nigel Gee & Associates Limited Marine vessels
US6065415A (en) * 1994-12-01 2000-05-23 Orr; Anthony Hugh Reduction of wave making by multi-hull surface vessel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1753399A (en) * 1929-06-26 1930-04-08 William R Blair Ocean-going water craft
US2052991A (en) * 1933-02-24 1936-09-01 Henry K Stack Construction in watercraft
FR1169344A (fr) * 1957-03-12 1958-12-26 Dispositif triangulaire de coques annulant le tangage et le roulis et par voie de conséquence la dérive
FR1246011A (fr) * 1960-01-25 1960-11-10 Forme nouvelle de coque de navire dite <<forme catamaran à flanc droit>> et système <<tracteur>> pour coque catamaran

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1753399A (en) * 1929-06-26 1930-04-08 William R Blair Ocean-going water craft
US2052991A (en) * 1933-02-24 1936-09-01 Henry K Stack Construction in watercraft
FR1169344A (fr) * 1957-03-12 1958-12-26 Dispositif triangulaire de coques annulant le tangage et le roulis et par voie de conséquence la dérive
FR1246011A (fr) * 1960-01-25 1960-11-10 Forme nouvelle de coque de navire dite <<forme catamaran à flanc droit>> et système <<tracteur>> pour coque catamaran

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995575A (en) * 1972-08-10 1976-12-07 Jones Jr Allen Semidisplacement hydrofoil ship
US4130078A (en) * 1975-01-06 1978-12-19 Institut Francais Du Petrole Floating device connected to a ship, for towing a submerged member with a lateral shift thereof with respect to the ship route
US5211126A (en) * 1992-05-18 1993-05-18 Johnson Robert K Ship or boat construction having three hulls
WO1994020359A1 (en) * 1993-03-11 1994-09-15 Wintria Ab Ship comprising a displacement central hull and two side hulls
US6065415A (en) * 1994-12-01 2000-05-23 Orr; Anthony Hugh Reduction of wave making by multi-hull surface vessel
WO1997010988A1 (en) * 1995-09-20 1997-03-27 Nigel Gee & Associates Limited Marine vessels
US6044784A (en) * 1995-09-20 2000-04-04 Nigel Gee And Associates Limited Marine vessels

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Publication number Publication date
NL6413568A (es) 1965-05-26
ES306367A1 (es) 1965-03-01
GB1052497A (es)

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