US3688726A - Stabilizing apparatus for ships - Google Patents

Stabilizing apparatus for ships Download PDF

Info

Publication number
US3688726A
US3688726A US873435A US3688726DA US3688726A US 3688726 A US3688726 A US 3688726A US 873435 A US873435 A US 873435A US 3688726D A US3688726D A US 3688726DA US 3688726 A US3688726 A US 3688726A
Authority
US
United States
Prior art keywords
hydrofoil
tip
passages
chamber
stabilizing device
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
Application number
US873435A
Inventor
Colin Campbell Mitchell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Brown Brothers and Co Ltd
Original Assignee
Brown Brothers and Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Brown Brothers and Co Ltd filed Critical Brown Brothers and Co Ltd
Application granted granted Critical
Publication of US3688726A publication Critical patent/US3688726A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
    • B63B39/06—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water

Definitions

  • a L N 373,435 This invention relates to a stabilizing device for a ship.
  • the device incorporates a hydrofoil formed with a chamber located close to the tip and passages leading [30] Forelgn Apphcauon Pnonty Data from the chamber and debouching in the vicinity of Nov. 9, 1968 Great Britain ..53,190/68 the tip.
  • the construction is effective to suppress cavitation.
  • US. Cl ..114/l26, 114/665 H 51 Int. Cl ..B63b 39/06, B63b 43/04 9 Chums 6 figures [58] Field of Search ..l14/126, 66.5 H, 166;
  • PATENTED SEP 5 I972 SHEET 2 0F STABILIZING APPARATUS FOR SHIPS This invention relates to stabilizing apparatus for ships and particularly to stabilizing apparatus of the type incorporating hydrofoils which may be fixed or may be movable to provide varying angles of incidence.
  • Cavitation occurs when water streaming over the surface of the stabilizing device is unable to change direction fast enough to follow the contour of the stabilizing device and leaves the surface of the device to cause a cavity to be formed between the stream and the surface.
  • the problem is consequently to eliminate the conditions which cause cavitation during operation of a stabilizing device.
  • a stabilizing device consists of a hydrofoil formed with an internal chamber at the tip and passages disposed in at least one fore and aft row leading from the chamber and debouching at the surface of the hydrofoil in the vicinity of the tip of the hydrofoil.
  • the hydrofoil is additionally formed with at least one entry port in the leading edge providing access to the chamber, and the passages lead from the chamber in a direction oblique and rearward with respect to the span of the hydrofoil (i.e. the fore and aft direction).
  • the hydrofoil is formed with passages arranged in several rows.
  • the hydrofoil may be formed in two portions, a main body portion and a tip portion connected to the main body portion, the tip portion being shaped as a hollow cap arranged to fit over the outer end of the main body portion and being formed with the entry port and the passages, the chamber being defined between the hollow cap and the adjacent end of the main body portion.
  • the chamber in this construction may be. arranged to taper from a maximum width at the leading edge to a minimum width at the trailing edge.
  • the hydrofoil may be formed with several passages in several rows in tier formation, at least one row being of upwardly directed passages and at least one row being of downwardly directed passages debouching at intervals in a fore and aft direction along the upper portion and the lower portion respectively of the tip of the hydrofoil.
  • the hydrofoil may be formed with several entry ports in the leading edge of the hydrofoil.
  • the or each port may be circular, elliptical, or in the form of a slot.
  • the passages are arranged in several rows of which at least one row is disposed along the upper surface of the hydrofoil, at least one row is disposed along the under surface of the hydrofoil, and at least one row is disposed along the tip of the hydrofoil.
  • the chamber may be built as an extension on to the tip of a previously-existing hydrofoil. Where this is done the chamber may be constituted by an extension' of the upper surface of the previously-existing hydrofoil an extension of the under surface of the previously-existing hydrofoil and a new tip spaced from the existing tip of the previously-existing hydrofoil formed respectively by three appropriately shaped metal plates fastened to the existing hydrofoil and to one another as by welding. In this construction the passages may be constituted by holes drilled in the plates.
  • the hydrofoil may be a stationary or a movable fin or may be a bilge keel.
  • FIG. 1 is a plan view of a hydrofoil according to one embodiment of the invention
  • FIG. 2 is .an elevation looking on the leading (adjacent) edge of the hydrofoil illustrated in FIG. 1 and FIG. 3 is an elevation looking towards the tip of the hydrofoil illustrated in FIG. 1;
  • FIG. 4 is a plan view of another embodiment of the invention.
  • FIG. 5 is a section through 55 in FIG. 4, and
  • FIG. 6 is a view looking towards the tip of the hydrofoil illustrated in FIG. 4.
  • 1 denotes the complete hydrofoil
  • 2. denotes an internal chamber formed within the hydrofoil, the leading edge 3 of the hydrofoil being formed with an entry port 4 providing access to the chamber 2 and the tip of the hydrofoil being formed with passages 5 leading obliquely and rearwardly with respect to the span of the hydrofoil and debouching at the tip of the hydrofoil through ports 6.
  • the hydrofoil is formed in two portions of which one is a main body portion 1A and the other is a tip portion 7 formed as a hollow cap arranged to fit over the end of the main portion 1A and formed with the entry port and the passages, the hollow cap constituting the tip portion 7 defining with the main body portion 1A the chamber 2.
  • the tip portion itself is formed for convenience of manufacture from two portions, a shell portion 7A and an outer tip portion 8 fixed to the shell portion 7A and formed with the passages 5. To avoid confusion the span of the hydrofoil is defined as the dimension 9.
  • the chamber 2 is formed by three plates l0, l1 and 12 welded to one another and to the tip of an existing complete hydrofoil 13 to form respectively extensions to the upper surface and the lower surface of the hydrofoil and a new tip to the hydrofoil.
  • the plates 10, 11, 12 being formed with holes 14 constituting passages.
  • the chamber 2 is formed of several separate plates welded to one another and to the tip of an existing complete hydrofoil, the chamber may be formed as an integral unit which is then attached to an existing hydrofoil or the chamber may be built into the hydrofoil when the hydrofoil is being constructed.
  • FIGS. 1 to 3 except that water enters the chamber through some of the passages near the leading edge of the hydrofoil and leaves the chamber through the passages towards the trailing edge of the hydrofoil.
  • the embodiment of FIGS. 1 to 3 is slightly more efficient hydrodynamically, but the embodiment of FIGS. 4 to 6 is easier and cheaper to construct and is easy to incorporate in an existing hydrofoil.
  • Astabilizing device comprising a hydrofoil formed with an internal chamber at the tip of the hydrofoil and passages disposed in at least one fore and aft row leading from the chamber and debouching at the surface of the hydrofoil in the vicinity of the tip of the hydrofoil and at least one entry port in the leading edge of the hydrofoil to provide access to the chamber, whereby fluids in the medium in which the hydrofoil is moving enters the said entry port as the said hydrofoil moves therethrough and leaves through the said passages to reduce cavitation in the vicinity of the tip.
  • a stabilizing device as claimed in claim 1 in which the passages lead from the chamber in a direction oblique and rearward with respect to the span of the hydrofoil.
  • a stabilizing device as claimed in claim 1 in which the hydrofoil is formed with passages arranged in several rows.
  • a stabilizing device as claimed in claim 3 in which the rows of passages are arranged in tier formation, the passages of at least one row being directed upwardly and debouching at intervals in a fore and aft direction along the upper portion of the tip of each hydrofoil,
  • each hydrofoil is formed in two portions, a main body portion and a tip portion connected to the main body portion, the tip portion being shaped as a hollow cap arranged to fit over the outer end of the main body portion and being formed with the entry port and the passages, the chamber being defined between the hollow cap and the adjacent end of the main body portion.
  • a stabilizing device as claimed in'claim 5 in which the tip portion is constituted by a shell portion connected to the main body portion and formed with the entry port and an outer tip portion fixed to the shell portion and formed with the passages.
  • a stabilizing device as claimed in claim 2 in which the chamber tapers from a maximum width at the leadinedge to a minimum width at the trajlin edge.
  • stabilizing device as claimed in c arm 1 incorporating several rows of passages in which at least one row is located along the upper surface of the hydrofoil, at least one row is located along the under surface of the hydrofoil, and at least one row is located along the tip of the hydrofoil.
  • a stabilizing device comprising a hydrofoil formed with an internal chamber at the tip of the hydrofoil and passages disposed in at least one fore and aft row lead- I ing from the chamber and debouching at the surface of the hydrofoil in the vicinity of the tip of the hydrofoil, said device comprising a previously existing hydrofoil and a chamber formed with passages fastened to the tip of the previously-existing hydrofoil, and wherein the chamber is formed of three appropriately shaped metal plates welded to one another and to the tip of the previously-existing hydrofoil, one plate constituting an extension of the upper surface of the previously-existing hydrofoil, another plate constituting an extension of the undersurface of the previously-existing hydrofoil and the remaining plate constituting a new tip for the stabilizing device spaced from the tip of the previouslyexisting hydrofoil.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Hydraulic Turbines (AREA)
  • Tires In General (AREA)

Abstract

This invention relates to a stabilizing device for a ship. The device incorporates a hydrofoil formed with a chamber located close to the tip and passages leading from the chamber and debouching in the vicinity of the tip. The construction is effective to suppress cavitation.

Description

United States Patent [151 3,688,726 Mitchell, deceased Sept. 5, 1972 [54] STABILIZING APPARATUS FOR SHIPS [56] References Cited [72] Inventor: Colin Campbell Mitchell, deceased, UNITED STATES PATENTS late of Edinburgh, Scotland, Andrew wishart and John Mello ..l X pattulo, h of Edinburgh, Scot- 3,221,698 12/1965 Turner ..1l4/66.5 H land, executors Primary ExaminerTrygve M. Blix [73] Asslgnee: Bmqlers m) Att0rney-Larson, Taylor and Hinds Lunlted, Edinburgh, Scotland 22] Filed: Nov. 3, 1969 t 7] ABSTRACT [21] A L N 373,435 This invention relates to a stabilizing device for a ship. The device incorporates a hydrofoil formed with a chamber located close to the tip and passages leading [30] Forelgn Apphcauon Pnonty Data from the chamber and debouching in the vicinity of Nov. 9, 1968 Great Britain ..53,190/68 the tip. The construction is effective to suppress cavitation. [52] US. Cl ..114/l26, 114/665 H 51 Int. Cl ..B63b 39/06, B63b 43/04 9 Chums 6 figures [58] Field of Search ..l14/126, 66.5 H, 166;
PATENTED SEP 5 I972 SHEET 2 0F STABILIZING APPARATUS FOR SHIPS This invention relates to stabilizing apparatus for ships and particularly to stabilizing apparatus of the type incorporating hydrofoils which may be fixed or may be movable to provide varying angles of incidence.
It is known that cavitation occurs at the tip of such a stabilizing device when it is in operation. Such cavitation gives rise to vortices which stream from the tailing edge of the stabilizing device. At best this situation results in the production of underwater noise and in extreme cases the vortices may extend far enough to be drawn into the stream of water entering the ships propeller thereby reducing the efficiency of the propeller and possibly causing erosion of the propeller.
Cavitation occurs when water streaming over the surface of the stabilizing device is unable to change direction fast enough to follow the contour of the stabilizing device and leaves the surface of the device to cause a cavity to be formed between the stream and the surface.
The problem is consequently to eliminate the conditions which cause cavitation during operation of a stabilizing device.
It is an object of the present invention to provide a construction of stabilizing device in which cavitation is eliminated or greatly reduced.
A stabilizing device according to the invention consists of a hydrofoil formed with an internal chamber at the tip and passages disposed in at least one fore and aft row leading from the chamber and debouching at the surface of the hydrofoil in the vicinity of the tip of the hydrofoil.
In one construction the hydrofoil is additionally formed with at least one entry port in the leading edge providing access to the chamber, and the passages lead from the chamber in a direction oblique and rearward with respect to the span of the hydrofoil (i.e. the fore and aft direction).
Preferably, the hydrofoil is formed with passages arranged in several rows.
Conveniently the hydrofoil may be formed in two portions, a main body portion and a tip portion connected to the main body portion, the tip portion being shaped as a hollow cap arranged to fit over the outer end of the main body portion and being formed with the entry port and the passages, the chamber being defined between the hollow cap and the adjacent end of the main body portion. The chamber in this construction may be. arranged to taper from a maximum width at the leading edge to a minimum width at the trailing edge.
The hydrofoil may be formed with several passages in several rows in tier formation, at least one row being of upwardly directed passages and at least one row being of downwardly directed passages debouching at intervals in a fore and aft direction along the upper portion and the lower portion respectively of the tip of the hydrofoil.
The hydrofoil may be formed with several entry ports in the leading edge of the hydrofoil. The or each port may be circular, elliptical, or in the form of a slot.
In an alternative construction the passages are arranged in several rows of which at least one row is disposed along the upper surface of the hydrofoil, at least one row is disposed along the under surface of the hydrofoil, and at least one row is disposed along the tip of the hydrofoil.
The chamber may be built as an extension on to the tip of a previously-existing hydrofoil. Where this is done the chamber may be constituted by an extension' of the upper surface of the previously-existing hydrofoil an extension of the under surface of the previously-existing hydrofoil and a new tip spaced from the existing tip of the previously-existing hydrofoil formed respectively by three appropriately shaped metal plates fastened to the existing hydrofoil and to one another as by welding. In this construction the passages may be constituted by holes drilled in the plates.
The hydrofoil may be a stationary or a movable fin or may be a bilge keel.
Practical embodiments of the invention are illustrated in the accompanying semi-diagrammatic drawings in which FIG. 1 is a plan view of a hydrofoil according to one embodiment of the invention,
FIG. 2 is .an elevation looking on the leading (adjacent) edge of the hydrofoil illustrated in FIG. 1 and FIG. 3 is an elevation looking towards the tip of the hydrofoil illustrated in FIG. 1;
FIG. 4 is a plan view of another embodiment of the invention,
' FIG. 5 is a section through 55 in FIG. 4, and
FIG. 6 is a view looking towards the tip of the hydrofoil illustrated in FIG. 4.
In the drawings, and referring first to FIGS. 1 to 3, 1 denotes the complete hydrofoil, 2. denotes an internal chamber formed within the hydrofoil, the leading edge 3 of the hydrofoil being formed with an entry port 4 providing access to the chamber 2 and the tip of the hydrofoil being formed with passages 5 leading obliquely and rearwardly with respect to the span of the hydrofoil and debouching at the tip of the hydrofoil through ports 6. The hydrofoil is formed in two portions of which one is a main body portion 1A and the other is a tip portion 7 formed as a hollow cap arranged to fit over the end of the main portion 1A and formed with the entry port and the passages, the hollow cap constituting the tip portion 7 defining with the main body portion 1A the chamber 2. The tip portion itself is formed for convenience of manufacture from two portions, a shell portion 7A and an outer tip portion 8 fixed to the shell portion 7A and formed with the passages 5. To avoid confusion the span of the hydrofoil is defined as the dimension 9.
Referring to FIGS. 4 to 6, the chamber 2 is formed by three plates l0, l1 and 12 welded to one another and to the tip of an existing complete hydrofoil 13 to form respectively extensions to the upper surface and the lower surface of the hydrofoil and a new tip to the hydrofoil. The plates 10, 11, 12 being formed with holes 14 constituting passages. It will be understood that although in this illustrated embodiment the chamber 2 is formed of several separate plates welded to one another and to the tip of an existing complete hydrofoil, the chamber may be formed as an integral unit which is then attached to an existing hydrofoil or the chamber may be built into the hydrofoil when the hydrofoil is being constructed.
In practice, and referring first to FIGS. 1 to 3 when the hydrofoil l is moving through the water, water enters the entry port 4 by reason of the forward movement of the hydrofoil, fills the chamber 2, is accelerated in its passage through the narrowing chamber and flows outwards through the passages 5 and the ports 6, and issues at increased velocity from the hydrofoil at the tip where cavitation tends to take place. The water issuing from the ports 6 fills the space which would otherwise be left empty at the point where the water flowing past the hydrofoil leaves the surfaces of the hydrofoil. Cavitation thus does not take place and no vortex is formed. The mode of action of the embodiment illustrated in FIGS. 4 to 6 is similar to that of the embodiment in FIGS. 1 to 3 except that water enters the chamber through some of the passages near the leading edge of the hydrofoil and leaves the chamber through the passages towards the trailing edge of the hydrofoil. The embodiment of FIGS. 1 to 3 is slightly more efficient hydrodynamically, but the embodiment of FIGS. 4 to 6 is easier and cheaper to construct and is easy to incorporate in an existing hydrofoil.
What is claimed is:
1. Astabilizing device comprising a hydrofoil formed with an internal chamber at the tip of the hydrofoil and passages disposed in at least one fore and aft row leading from the chamber and debouching at the surface of the hydrofoil in the vicinity of the tip of the hydrofoil and at least one entry port in the leading edge of the hydrofoil to provide access to the chamber, whereby fluids in the medium in which the hydrofoil is moving enters the said entry port as the said hydrofoil moves therethrough and leaves through the said passages to reduce cavitation in the vicinity of the tip.
2. A stabilizing device as claimed in claim 1 in which the passages lead from the chamber in a direction oblique and rearward with respect to the span of the hydrofoil.
3. A stabilizing device as claimed in claim 1 in which the hydrofoil is formed with passages arranged in several rows.
4. A stabilizing device as claimed in claim 3 in which the rows of passages are arranged in tier formation, the passages of at least one row being directed upwardly and debouching at intervals in a fore and aft direction along the upper portion of the tip of each hydrofoil,
and the passages of at least one other row being downwardly directed and debouching at intervals in a fore and aft direction along the lower portion of the tip of the hydrofoil.
5. A stabilizing device as claimed in claim 2 in which each hydrofoil is formed in two portions, a main body portion and a tip portion connected to the main body portion, the tip portion being shaped as a hollow cap arranged to fit over the outer end of the main body portion and being formed with the entry port and the passages, the chamber being defined between the hollow cap and the adjacent end of the main body portion.
6. A stabilizing device as claimed in'claim 5 in which the tip portion is constituted by a shell portion connected to the main body portion and formed with the entry port and an outer tip portion fixed to the shell portion and formed with the passages.
7. A stabilizing device as claimed in claim 2 in which the chamber tapers from a maximum width at the leadinedge to a minimum width at the trajlin edge.
. stabilizing device as claimed in c arm 1 incorporating several rows of passages in which at least one row is located along the upper surface of the hydrofoil, at least one row is located along the under surface of the hydrofoil, and at least one row is located along the tip of the hydrofoil.
9. A stabilizing device comprising a hydrofoil formed with an internal chamber at the tip of the hydrofoil and passages disposed in at least one fore and aft row lead- I ing from the chamber and debouching at the surface of the hydrofoil in the vicinity of the tip of the hydrofoil, said device comprising a previously existing hydrofoil and a chamber formed with passages fastened to the tip of the previously-existing hydrofoil, and wherein the chamber is formed of three appropriately shaped metal plates welded to one another and to the tip of the previously-existing hydrofoil, one plate constituting an extension of the upper surface of the previously-existing hydrofoil, another plate constituting an extension of the undersurface of the previously-existing hydrofoil and the remaining plate constituting a new tip for the stabilizing device spaced from the tip of the previouslyexisting hydrofoil.

Claims (9)

1. A stabilizing device comprising a hydrofoil formed with an internal chamber at the tip of the hydrofoil and passages disposed in at least one fore and aft row leading from the chamber and debouching at the surface of the hydrofoil in the vicinity of the tip of the hydrofoil and at least one entry port in the leading edge of the hydrofoil to provide access to the chamber, whereby fluids in the medium in which the hydrofoil is moving enters the said entry port as the said hydrofoil moves therethrough and leaves through the said passages to reduce cavitation in the vicinity of the tip.
2. A stabilizing device as claimed in claim 1 in which the passages lead from the chamber in a direction oblique and rearward with respect to the span of the hydrofoil.
3. A stabilizing device as claimed in claim 1 in which the hydrofoil is formed with passages arranged in several rows.
4. A stabilizing device as claimed in claim 3 in which the rows of passages are arranged in tier formation, the passages of at least one row being directed upwardly and debouching at intervals in a fore and aft direction along the upper portion of the tip of each hydrofoil, and the passages of at least one other row being downwardly directed and debouching at intervals in a fore and aft direction along the lower portion of the tip of the hydrofoil.
5. A stabilizing device as claimed in claim 2 in which each hydrofoil is formed in two portions, a main body portion and a tip portion connected to the main body portion, the tip portion being shaped as a hollow cap arranged to fit over the outer end of the main body portion and being formed with the entry port and the passages, the chamber being defined between the hollow cap and the adjacent end of the main body portion.
6. A stabilizing device as claimed in claim 5 in which the tip portion is constituted by a shell portion connected to the main body portion and formed with the entry port and an outer tip portion fixed to the shell portion and formed with the passages.
7. A stabilizing device as claimed in claim 2 in which the chamber tapers from a maximum width at the leading edge to a minimum width at the trailing edge.
8. A stabilizing device as claimed in claim 1 incorporating several rows of passages in which at least one row is located along the upper surface of the hydrofoil, at least one row is located along the under surface of the hydrofoil, and at least one row is located along the tip of the hydrofoil.
9. A stabilizing device comprising a hydrofoil formed with an internal chamber at the tip of the hydrofoil and passages disposed in at least one fore and aft row leading from the chamber and debouching at the surface of the hydrofoil in the vicinity of the tip of the hydrofoil, said device comprising a previously existing hydrofoil and a chamber formed with passages fastened to the tip of the previously-existing hydrofoil, and wherein the chamber is formed of three appropriately shaped metal plates welded to one another and to the tip of the previously-existing hydrofoil, one plate constituting an extension of the upper surface of the previously-existing hydrofoil, another plate constituting an extension of the undersurface of the previously-existing hydrofoil and the remaining plate constituting a new tip for the stabilizing device spaced from the tip of the previously-existing hydrofoil.
US873435A 1968-11-09 1969-11-03 Stabilizing apparatus for ships Expired - Lifetime US3688726A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB53190/68A GB1224324A (en) 1968-11-09 1968-11-09 Improvements in or relating to stabilizing apparatus for ships

Publications (1)

Publication Number Publication Date
US3688726A true US3688726A (en) 1972-09-05

Family

ID=10466939

Family Applications (1)

Application Number Title Priority Date Filing Date
US873435A Expired - Lifetime US3688726A (en) 1968-11-09 1969-11-03 Stabilizing apparatus for ships

Country Status (6)

Country Link
US (1) US3688726A (en)
JP (1) JPS4833596B1 (en)
DE (1) DE1956032A1 (en)
FR (1) FR2022967A1 (en)
GB (1) GB1224324A (en)
NL (1) NL6916763A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4644889A (en) * 1985-08-26 1987-02-24 Krans Keith A Sailboat keel

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ563489A (en) * 2003-05-01 2009-01-31 Navatek Ltd Vessel with bow attached low drag submerged asymmetric displacement lifting body

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2961987A (en) * 1958-08-13 1960-11-29 Interessengemeinschaft Mello R Rudders for ships
US3221698A (en) * 1963-10-30 1965-12-07 James J Turner Hydrofoil control system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2961987A (en) * 1958-08-13 1960-11-29 Interessengemeinschaft Mello R Rudders for ships
US3221698A (en) * 1963-10-30 1965-12-07 James J Turner Hydrofoil control system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4644889A (en) * 1985-08-26 1987-02-24 Krans Keith A Sailboat keel

Also Published As

Publication number Publication date
NL6916763A (en) 1970-05-12
DE1956032A1 (en) 1970-06-04
FR2022967A1 (en) 1970-08-07
GB1224324A (en) 1971-03-10
JPS4833596B1 (en) 1973-10-15

Similar Documents

Publication Publication Date Title
CN101484351B (en) Ship
US6216622B1 (en) Boat hull with center V-hull and sponsons
US4672905A (en) Boat hull with center V-hull and sponsons
US3382833A (en) High-speed motorboat hull
US3776168A (en) High speed boat hull
US3902445A (en) Air-cushioned planing hull
CN101284564A (en) Ship
US3707936A (en) Boat hull construction
US5031556A (en) Marine hull
US3760756A (en) Watercraft construction
US3688723A (en) Hydrofoil system for water craft
US1935622A (en) Planing boat
US2185430A (en) High speed displacement type hull
US3991696A (en) Hull of a small-sized ship
US2371478A (en) Boat hull
US3688726A (en) Stabilizing apparatus for ships
US3331347A (en) Boats comprising means for introducing air to submerged portions of the boat bottom
US6065415A (en) Reduction of wave making by multi-hull surface vessel
US3570438A (en) Profiled stabilizing fin for a ship
US1644725A (en) Boat
US5317982A (en) Ship
US3450085A (en) Hydroplane boat hull
US3306244A (en) Bow bulb for ships
US3495563A (en) Seaworthy hydroplanes
US3160134A (en) Boat hull