US3175528A - High-speed watercraft - Google Patents

High-speed watercraft Download PDF

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Publication number
US3175528A
US3175528A US312566A US31256663A US3175528A US 3175528 A US3175528 A US 3175528A US 312566 A US312566 A US 312566A US 31256663 A US31256663 A US 31256663A US 3175528 A US3175528 A US 3175528A
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US
United States
Prior art keywords
hull
craft
water
watercraft
center line
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.)
Expired - Lifetime
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US312566A
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English (en)
Inventor
Vinten Charles
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Individual
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Individual
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Filing date
Publication date
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Publication of US3175528A publication Critical patent/US3175528A/en
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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
    • B63B1/16—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces
    • B63B1/18—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces of hydroplane type
    • B63B1/20—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces of hydroplane type having more than one planing surface
    • 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
    • B63B1/16—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces
    • B63B1/18—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces of hydroplane type
    • B63B1/20—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces of hydroplane type having more than one planing surface
    • B63B2001/201—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces of hydroplane type having more than one planing surface divided by longitudinal chines
    • 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
    • B63B1/16—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces
    • B63B1/18—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces of hydroplane type
    • B63B1/20—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces of hydroplane type having more than one planing surface
    • B63B2001/203—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces of hydroplane type having more than one planing surface arranged in semi-catamaran configuration

Definitions

  • the present invention relates to watercraft, and particularly to watercraft which are designed to move at a high speed so that the craft planes over the surface of the water.
  • the present invention aims at providing a craft which is so designed that the upwards thrust on the craft is augmented by reaction with the bow waves created by passage of the craft through the water whereby the craft is lifted to the planing condition at a lower speed than is possible with conventional highspeed craft.
  • the present invention provides a watercraft of which the hull has two substantially parallel keels, in which each keel has extending from it an upright outwardly-facing surface and a sloping downwardly-facing surface, and in which the sloping surfaces are connected together below the waterline of the craft by a nacelle surface extending longitudinally of the centre line of the craft whereby the bow waves generated by the bow portions when the craft is moving in the forward direction are designed to meet on the centre line of the craft and impinge on the nacelle surface.
  • FIG. 1 is a side elevation of one form of watercraft
  • FIG. 2 is an underneath plan view of one half of the craft shown in FIG. 1 taken to one side of the longitudinal centre line;
  • FIG. 3 is an end view from the bows of the craft.
  • FIG. 4 is an end view from the stern.
  • FIG. 2 the plan view of the craft shown in the drawings in substantially rectangular and the keels 2 are substantially parallel to the centre line of the craft and are bowed slightly outwards.
  • each keel 2 Extending from each keel 2 is a substantially upright outwardly-facing slightly convex surface 4 which is in clined outwardly at a small angle to the vertical, and a downwardly-facing slightly convex surface 6 which slopes at a small angle .to the waterline 13 and projects slightly outboard of the hull.
  • Each outer surface 4 swells outwardly at its upper end in a sloping surface 8 which forms a greater angle to the vertical and is contiguous with an upright surface 10 whereby the surfaces 8 and 10 define sponsons. These sponsons provide an additional stabilizing force should the roll of the craft become excessive and also give a useful increase in the area of the upper surface of the craft.
  • the inner ends of the sloping surfaces 6 are interconnected by a convex nacelle surface 12 which runs substantially the length of the craft.
  • the nacelle surface 12 extends below the waterline at at least the center portion of the craft but slopes upwardly towards the bows of th craft until at the extreme hows it is well above the waterline.
  • the convexity of the surfaces 4, 6 and 12 provides stiffness and increases the space within the craft. However stiffness may be obtained by a concave formation of the surfaces or the surfaces may be plane.
  • the sloping surfaces 6 are also curved convexly in plan view, the curve being sharper at the bows of the craft than at the centre and aft portions.
  • This augmenting force has the effect of lifting the craft vertically to enable the size of the bow waves to diminish until equilibrium is achieved between the conventional displacement forces on those surfaces submerged and the reactions on the nacelle surface. Energy losses are reduced because the normally wasted bow wave energy is made to produce lift and the smaller area of the surfaces thereby in contact with the moving water enables the craft to move at a faster speed for the same expenditure of energy when compared with a conventional craft having the same overall submerged surface area but without the configuration of the present craft.
  • the present invention therefore enables craft to be built with less powerful motors but with substantially the same top speed compared with conventional craft which do not use the configuration of the craft of the present invention for augmenting the buoyancy forces.
  • the present invention resides in the shape of the hull of the craft and it is envisaged that this shape could be applied to flying boats or to seaplane floats. The shape could also be applied to vehicles designed to move over snow or soft mud and not solely through water as such and it is also envisaged that the craft could be fitted with retractable road wheels to make it amphibious.
  • the present invention also does not hinge upon the propulsion system used. It is envisaged that conventional propellers could be used with conventional rudders, that the steerable waterjet propulsion could be used or that the craft could be propelled by air reaction propulsion means situated above the water line of the craft.
  • the flow of water past the craft could be enhanced by bleeding off boundary layers of water at selected portions of the hull through apertures therein, to prevent the generation of energy-absorbing eddies adjacent to the surfaces of the craft.
  • the bled-off water could then be ejected from the stern of the craft at a speed greater than the forward speed thereof to provide a further addition to the propulsive thrust available.
  • a planing hull for watercraft said hull having sides which are substantially parallel in the fore and aft direction and two downwardly facing surfaces forming part of the bottom of the hull and inclined upwardly towards the centre line of the hull and being connected together below the water line of the hull by a nacelle surface extending longitudinally of the centre line of the 7 surfaces and are thereby caused to impinge on the nacelle surface.
  • a planing hull for watercraft as claimed in claim 1 in which said downwardly facing surfaces project out- 7 board of the adjacent lower portions of the sides so as to act in the manner of water skis at'planing speeds.
  • a planing hull for watercraft said hull having sides which are substantially parallel in the fore and aft direction and two downwardly facing convex surfaces forming part of the bottom of the hull and inclined upwardly at a small angle towards the centre line of the hull and,
  • a convex nacelle surface of substantially the same length as the hull and extending longitudinally of the centre line of the hull at a lesser depth than the sides and rising above the water line at the bows, and said substantially parallel sides being upright at least int-he region of "and below the water line so that when the craft is moving in the forward direction at displacement speeds, bow

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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)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Soil Working Implements (AREA)
US312566A 1962-10-01 1963-09-30 High-speed watercraft Expired - Lifetime US3175528A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3715762A GB1054398A (forum.php) 1962-10-01 1962-10-01

Publications (1)

Publication Number Publication Date
US3175528A true US3175528A (en) 1965-03-30

Family

ID=10394215

Family Applications (1)

Application Number Title Priority Date Filing Date
US312566A Expired - Lifetime US3175528A (en) 1962-10-01 1963-09-30 High-speed watercraft

Country Status (8)

Country Link
US (1) US3175528A (forum.php)
BE (1) BE637968A (forum.php)
CH (1) CH403529A (forum.php)
DE (1) DE1272759B (forum.php)
FR (1) FR1383841A (forum.php)
GB (1) GB1054398A (forum.php)
NL (1) NL298562A (forum.php)
SE (1) SE316392B (forum.php)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3800725A (en) * 1973-03-30 1974-04-02 Heureux R L Boat hull

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US277443A (en) * 1883-05-15 John s
US987059A (en) * 1910-10-10 1911-03-14 Franklin W Frampton Boat-hull and ballast means therefor.
US1220558A (en) * 1916-01-26 1917-03-27 George W Richardson Boat.
US1581881A (en) * 1925-05-09 1926-04-20 Clarence R Smith Speed-boat hull
US2397683A (en) * 1942-12-23 1946-04-02 Safety Boat Company Boat
US2474667A (en) * 1945-06-30 1949-06-28 Robert L Harvey Speedboat hull
US2725027A (en) * 1951-11-21 1955-11-29 H H & N A Hardin Company Multiple unit barge hull construction
US2735392A (en) * 1956-02-21 Boat hull having an upwardly arched bottom
US2989939A (en) * 1956-12-17 1961-06-27 Lowell E Engleking Power boat hull

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE529474C (de) * 1931-07-14 Stettiner Oderwerke Akt Ges Fu Spantform fuer Fracht- und Fahrgastschiffe
GB593160A (en) * 1945-05-02 1947-10-09 Leonard Newham Improvements in or relating to the form or shape of ships' hulls
US1312036A (en) * 1919-08-05 Hydroplane-boat
DE385609C (de) * 1914-03-12 1923-12-11 William Albert Hickman Schiffsrumpf
DE408278C (de) * 1923-06-21 1925-01-12 Anderssen Fa J Wasserfahrzeug mit Schraubenantrieb und mit sich in der Laengsrichtung des Bodens erstreckenden Kanaelen
DE568612C (de) * 1927-04-27 1933-01-23 Otto Paul Gleitbootkoerper

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US277443A (en) * 1883-05-15 John s
US2735392A (en) * 1956-02-21 Boat hull having an upwardly arched bottom
US987059A (en) * 1910-10-10 1911-03-14 Franklin W Frampton Boat-hull and ballast means therefor.
US1220558A (en) * 1916-01-26 1917-03-27 George W Richardson Boat.
US1581881A (en) * 1925-05-09 1926-04-20 Clarence R Smith Speed-boat hull
US2397683A (en) * 1942-12-23 1946-04-02 Safety Boat Company Boat
US2474667A (en) * 1945-06-30 1949-06-28 Robert L Harvey Speedboat hull
US2725027A (en) * 1951-11-21 1955-11-29 H H & N A Hardin Company Multiple unit barge hull construction
US2989939A (en) * 1956-12-17 1961-06-27 Lowell E Engleking Power boat hull

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3800725A (en) * 1973-03-30 1974-04-02 Heureux R L Boat hull

Also Published As

Publication number Publication date
FR1383841A (fr) 1965-01-04
BE637968A (forum.php)
CH403529A (de) 1965-11-30
GB1054398A (forum.php) 1967-01-11
SE316392B (forum.php) 1969-10-20
DE1272759B (de) 1968-07-11
NL298562A (forum.php)

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