US3511203A - Ship having a plow stem - Google Patents

Ship having a plow stem Download PDF

Info

Publication number
US3511203A
US3511203A US821786A US3511203DA US3511203A US 3511203 A US3511203 A US 3511203A US 821786 A US821786 A US 821786A US 3511203D A US3511203D A US 3511203DA US 3511203 A US3511203 A US 3511203A
Authority
US
United States
Prior art keywords
ship
plow
stem
water
loaded
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
US821786A
Inventor
Lubbertus Buyscoll
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3511203A publication Critical patent/US3511203A/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 
    • 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
    • B63B1/04—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with single hull
    • B63B1/06—Shape of fore part
    • B63B1/063—Bulbous bows
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T70/00—Maritime or waterways transport
    • Y02T70/10—Measures concerning design or construction of watercraft hulls

Definitions

  • the ship includes a hull having a stem formed between its half loaded waterline and its full loaded waterline with a plow having an upwardly and rearwardly projecting taper whereby water at the front of the forwardly moving ship will be raised upwardly as it passes rearwardly over the tapered portions to be divided into approximately equal portions that are directed to opposite sides of said hull.
  • the present invention relates generally to ship hulls and, more particularly, to a ship stern which reduces the amount of power required to move the water from the front of a forwardly moving ship.
  • the present invention is characterized by a ship stern formed between its half loaded waterline and its full loaded waterline with a plow having an upwardly and rearwardly extending taper.
  • FIG. 1 is a perspective view of a ship embodying the present invention
  • FIG. 2 depicts, in enlarged scale, fragmentary superimposed contours dened by a plurality of horizontal sectional views taken throughout the height of the ship shown in FIG. 1;
  • FIG. 3 depicts, in enlarged scale fragmentary superimposed contours defined by a plurality of vertical trans- 3,511,203 Patented May l2, 1970 ICC DESCRIPTION OF THE PREFERRED EMBODIMENT
  • the ship of present invention includes a hull having a stem A which is formed between its half and full loaded waterlines 5 and 10, respectively, with a plow, generally designated 13, having upwardly and rearwardly tapered surfaces 15 which angle outwardly to opposite sides of the ship hull whereby the water in the path of the ship will be lifted upwardly as the plow passes forwardly therethrough.
  • the surfaces 15 angles forwardly and downwardly to a rather blunt protuberance 21, which may be in the form of a conventional bulbous bow.
  • the horizontal lines in FIG. 2 represent verticals, or longitudinal vertical planes spaced at selected distances from the longitudinal center line of the ship.
  • the vertical lines in FIG. 2 represent the stations, or vertical transverse planes, taken at selected distances from the front end of the plow 13.
  • the curves 39 shown in FIG. 2 represent the horizontal contours of the right hand half of the plow 13 from the front end thereof, aft to station 18, such curves being taken along horizontal sections at waterlines 3, 5, 6, 7, 8 and 10. It is noted that the left hand half of the plow 13 is a mirror image of the right hand half.
  • the horizontal lines in FIG. 3 depict waterlines or horizontal planes through the ship shown in FIG. l and the vertical lines depict verticals, or planes extending vertically throughout the length of the ship and spaced at selected interavls form the longitudinally center line of the ship.
  • Curves 31 in FIG. 3 depict the contours dened by transverse vertical sectional views of the right hand side of the center line of the ship shown in FIG. 1, such sectional views being taken looking forward toward the front of the ship, it being noted that the left hand half is a mirror image thereof.
  • the front end of the protuberance 21 is at station 21 and each of the curves 31 are taken at the indicated stations, back to station 171/2.
  • the horizonal lines in FIG. 4 represent the waterlines, or horizontal planes through the plow 13.
  • the vertical lines in FIG. 4 represent stations, or transverse vertical planes, through the plow 13, commencing with station 21 at the tip of the protuberance 21 and progressing rearwardly in increments to station 18.
  • the curves 45 shown in FIG. 4 represent the vertical contour at the front end of the right hand half of the ship, such curves being defined by longitudinal vertical sectional views through such ship at verticals 0, 1, 2, 3, 4 and 5.
  • Waterline 10 is the loaded waterline, or depth to which the ship sinks when it is loaded, and it is of particular importance that the plow 13 angles upwardly and rearwardly at approximately 20 degrees from the half loaded waterline number 5 (waterline to which the half loaded ship would sink) to such loaded waterline number 10 to ⁇ cause the water passing thereover to be lifted from the path of the forwardly moving ship.
  • the plow 13 will lead the stem A through the water and will serve to pass such water upwardly and rearwardly over the inclined surfaces 15 to be rolled outwardly in much the same manner as the action produced by an agricultural plow share in the process of turning over sod. It has been discovered that the upwardly and outwardly turning of the water in this manner by the plow 13 enhances the operational characteristics of a ship by a substantial percentage over the performance of a conventional stem.
  • the stem A may employ a conventional bulbous bow design below Waterline 4 (FIG. 4), but the plow 13 must angle upwardly and rearwardly from approximately half loaded Waterline 5 to full loaded waterline 10.
  • the ship stem of present invention provides substantial reduction in the resistance to forward movement of a ship by the plow shape thereof.
  • a ship comprising:
  • a hull including a stem plow formed between the half 4 loaded waterline and the full loaded waterline with a tapered portion that angles upwardly and rearwardly at substantially 20 to the horizontal whereby when the loaded ship is driven thorugh the water 5 said plow will lift the Water upwardly from the path thereof and direct it rearwardly realtive to the tapered portion to be divided into approximately equal portions passing to opposite sides of said hull.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Soil Working Implements (AREA)

Description

May 12, 1970 BuYscOLL.
SHIP HAVING A PLOW STEM 5 Sheets-Sheet l Filed May 5, 1969 w h v M m. MW 1x s www www SN QN No wwm mi .WS RM 1ENTOR.
l 0555/9703 unsc L BY JM lf2 MW rToQ/v/sns' May 12, l1970 L. BUYscoLL 3,511,203
SHIP HAVING A PLOW STEM Filed May 5, 1969 5 Sheets-Sheei'I /f l Sza 3/ I N VE N TOR. vaag/eras uns'co rroQ/V-ys May 12, 197@ l.. BuYscoLL 3,511,203
SHIP HAVING A PLOW STEM @V/7 A M k) A u EL RJ 7 U INVENTOR.
05559 r0.5' wfsco L BY a aw@ W Afro/@v5 Ys FIGA United States Patent O M' May 24, 1968. This application May 5, 1969, Ser. No. 821,786 l Int. Cl. B63b 1/06 U.S. Cl. 114-56 1 Claim ABSTRACT OF THE DISCLOSURE This application relates to an improved ship stern design for moving water from the path of a ship. The ship includes a hull having a stem formed between its half loaded waterline and its full loaded waterline with a plow having an upwardly and rearwardly projecting taper whereby water at the front of the forwardly moving ship will be raised upwardly as it passes rearwardly over the tapered portions to be divided into approximately equal portions that are directed to opposite sides of said hull.
CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation-in-part of application of Ser. No. 732,500, led May 24, 1968.
BACKGROUND OF THE INVENTION Field of the invention The present invention relates generally to ship hulls and, more particularly, to a ship stern which reduces the amount of power required to move the water from the front of a forwardly moving ship.
Description of the prior art Conventional ship stems are generally formed with either vertical leading edges or bulbous bows. In operation, vertical Stems tend to push water to the side of the ship and out of the path thereof. Bulbous bow ships provide greater efliciency of operation when the ship is in ballast. In contrast, the ship plow of present invention is intended to provide improved performance in its loaded condition and moves water in the path of the ship upwardly and rearwardly with respect to the stem as such stem passes therethrough.
SUMMARY OF THE INVENTION The present invention is characterized by a ship stern formed between its half loaded waterline and its full loaded waterline with a plow having an upwardly and rearwardly extending taper. Thus, as the ship is propelled through the water, the water in the path thereof will be raised upwardly as it passes rearwardly over the tapered portion to thereby reduce the resistance to said ship moving through the water.
The objects and the advantages of the present invention will become apparent from a consideration of the following detailed description when taken in conjunction with the accompanying drawings.
DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a ship embodying the present invention;
FIG. 2 depicts, in enlarged scale, fragmentary superimposed contours dened by a plurality of horizontal sectional views taken throughout the height of the ship shown in FIG. 1;
FIG. 3 depicts, in enlarged scale fragmentary superimposed contours defined by a plurality of vertical trans- 3,511,203 Patented May l2, 1970 ICC DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIG. 1, the ship of present invention includes a hull having a stem A which is formed between its half and full loaded waterlines 5 and 10, respectively, with a plow, generally designated 13, having upwardly and rearwardly tapered surfaces 15 which angle outwardly to opposite sides of the ship hull whereby the water in the path of the ship will be lifted upwardly as the plow passes forwardly therethrough.
The surfaces 15 angles forwardly and downwardly to a rather blunt protuberance 21, which may be in the form of a conventional bulbous bow.
The horizontal lines in FIG. 2 represent verticals, or longitudinal vertical planes spaced at selected distances from the longitudinal center line of the ship. The vertical lines in FIG. 2 represent the stations, or vertical transverse planes, taken at selected distances from the front end of the plow 13. The curves 39 shown in FIG. 2 represent the horizontal contours of the right hand half of the plow 13 from the front end thereof, aft to station 18, such curves being taken along horizontal sections at waterlines 3, 5, 6, 7, 8 and 10. It is noted that the left hand half of the plow 13 is a mirror image of the right hand half.
The horizontal lines in FIG. 3 depict waterlines or horizontal planes through the ship shown in FIG. l and the vertical lines depict verticals, or planes extending vertically throughout the length of the ship and spaced at selected interavls form the longitudinally center line of the ship. Curves 31 in FIG. 3 depict the contours dened by transverse vertical sectional views of the right hand side of the center line of the ship shown in FIG. 1, such sectional views being taken looking forward toward the front of the ship, it being noted that the left hand half is a mirror image thereof. The front end of the protuberance 21 is at station 21 and each of the curves 31 are taken at the indicated stations, back to station 171/2.
The horizonal lines in FIG. 4 represent the waterlines, or horizontal planes through the plow 13. The vertical lines in FIG. 4 represent stations, or transverse vertical planes, through the plow 13, commencing with station 21 at the tip of the protuberance 21 and progressing rearwardly in increments to station 18. The curves 45 shown in FIG. 4 represent the vertical contour at the front end of the right hand half of the ship, such curves being defined by longitudinal vertical sectional views through such ship at verticals 0, 1, 2, 3, 4 and 5. Waterline 10 is the loaded waterline, or depth to which the ship sinks when it is loaded, and it is of particular importance that the plow 13 angles upwardly and rearwardly at approximately 20 degrees from the half loaded waterline number 5 (waterline to which the half loaded ship would sink) to such loaded waterline number 10 to `cause the water passing thereover to be lifted from the path of the forwardly moving ship.
From the foregoing, it will be apparent that when the loaded ship of present invention is under way, the plow 13 will lead the stem A through the water and will serve to pass such water upwardly and rearwardly over the inclined surfaces 15 to be rolled outwardly in much the same manner as the action produced by an agricultural plow share in the process of turning over sod. It has been discovered that the upwardly and outwardly turning of the water in this manner by the plow 13 enhances the operational characteristics of a ship by a substantial percentage over the performance of a conventional stem. As noted above, the stem A may employ a conventional bulbous bow design below Waterline 4 (FIG. 4), but the plow 13 must angle upwardly and rearwardly from approximately half loaded Waterline 5 to full loaded waterline 10.
From the foregoing, it will be apparent that the ship stem of present invention provides substantial reduction in the resistance to forward movement of a ship by the plow shape thereof.
Various modifications and changes may be made with regard to the foregoing detailed description without departing from the spirit of the invention.
I claim:
1. A ship comprising:
a hull including a stem plow formed between the half 4 loaded waterline and the full loaded waterline with a tapered portion that angles upwardly and rearwardly at substantially 20 to the horizontal whereby when the loaded ship is driven thorugh the water 5 said plow will lift the Water upwardly from the path thereof and direct it rearwardly realtive to the tapered portion to be divided into approximately equal portions passing to opposite sides of said hull.
10 References Cited UNITED STATES PATENTS 3,433,194 3/1969 Csupor 114-56 3,443,544 5/1969 Begizov 114-56 ANDREW H. FARRELL, Primary Examiner
US821786A 1969-05-05 1969-05-05 Ship having a plow stem Expired - Lifetime US3511203A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US82178669A 1969-05-05 1969-05-05

Publications (1)

Publication Number Publication Date
US3511203A true US3511203A (en) 1970-05-12

Family

ID=25234307

Family Applications (1)

Application Number Title Priority Date Filing Date
US821786A Expired - Lifetime US3511203A (en) 1969-05-05 1969-05-05 Ship having a plow stem

Country Status (1)

Country Link
US (1) US3511203A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3946687A (en) * 1974-08-06 1976-03-30 Newport News Shipbuilding And Drydock Company Conical bulbous bow
DE3031239A1 (en) * 1980-08-19 1982-04-01 Heinz-Herrmann Dipl.-Ing. 2100 Hamburg Suerken Extended bow structure for ship - has shape to suit speed and tapers into normal bows shape
WO1989006620A1 (en) * 1988-01-19 1989-07-27 Gerhard Cammann Boat, in particular motorsport boat
US6058864A (en) * 1996-05-13 2000-05-09 Ab Volvo Penta Ship hull and vessel with such a hull
US20080149014A1 (en) * 2005-03-09 2008-06-26 Ulsteinvik Design As Foreship Arrangement for a Vessel of the Displacement Type
USD742803S1 (en) 2013-10-11 2015-11-10 Ulstein Design & Solutions As Stern of ship hull
US9908589B1 (en) 2016-04-26 2018-03-06 Stephen Lee Bailey Hull shape for improved powering and seakeeping
CN107826208A (en) * 2017-10-26 2018-03-23 中国船舶工业集团公司第七0八研究所 A kind of bow island semi-submerged ship ship type
CN113320655A (en) * 2021-06-07 2021-08-31 上海交通大学 Buoyancy tank at bottom of semi-submersible platform and design method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3433194A (en) * 1966-03-26 1969-03-18 Maierform Trust Reg Bows of ships
US3443544A (en) * 1967-07-13 1969-05-13 Vladimir Nikolaevich Begizov Shape of ship's bow

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3433194A (en) * 1966-03-26 1969-03-18 Maierform Trust Reg Bows of ships
US3443544A (en) * 1967-07-13 1969-05-13 Vladimir Nikolaevich Begizov Shape of ship's bow

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3946687A (en) * 1974-08-06 1976-03-30 Newport News Shipbuilding And Drydock Company Conical bulbous bow
DE3031239A1 (en) * 1980-08-19 1982-04-01 Heinz-Herrmann Dipl.-Ing. 2100 Hamburg Suerken Extended bow structure for ship - has shape to suit speed and tapers into normal bows shape
WO1989006620A1 (en) * 1988-01-19 1989-07-27 Gerhard Cammann Boat, in particular motorsport boat
US6058864A (en) * 1996-05-13 2000-05-09 Ab Volvo Penta Ship hull and vessel with such a hull
US20080149014A1 (en) * 2005-03-09 2008-06-26 Ulsteinvik Design As Foreship Arrangement for a Vessel of the Displacement Type
US7658159B2 (en) * 2005-03-09 2010-02-09 Ulsteinvik Design As Foreship arrangement for a vessel of the displacement type
US20110120361A1 (en) * 2005-03-09 2011-05-26 Ulsteinvik Design As Foreship arrangement for a vessel of the displacement type
EP2530008B1 (en) 2005-03-09 2017-04-05 Ulstein Design & Solutions AS A vessel with an improved foreship arrangement
USD742803S1 (en) 2013-10-11 2015-11-10 Ulstein Design & Solutions As Stern of ship hull
US9908589B1 (en) 2016-04-26 2018-03-06 Stephen Lee Bailey Hull shape for improved powering and seakeeping
CN107826208A (en) * 2017-10-26 2018-03-23 中国船舶工业集团公司第七0八研究所 A kind of bow island semi-submerged ship ship type
CN113320655A (en) * 2021-06-07 2021-08-31 上海交通大学 Buoyancy tank at bottom of semi-submersible platform and design method thereof

Similar Documents

Publication Publication Date Title
US3511203A (en) Ship having a plow stem
US7225752B2 (en) Power boat with improved hull
US1189227A (en) Boat.
US2020792A (en) Water craft
US3303809A (en) Boat hull
US3045629A (en) Boat hull
US4002131A (en) Boat hull construction
EP0281653A1 (en) Ice breaking ship
US1042636A (en) Boat.
US4774902A (en) Mid-planing hull
Wachsmann The Thera waterborne procession reconsidered
US2519793A (en) Boat
DE3523763A1 (en) REAR PROTECTOR FOR ICEBREAKING SHIPS
GB1115676A (en) Improved hull forms
EP2842861A2 (en) Wakesurfing boat and hull for a wakesurfing boat
US912814A (en) Hydroplane vessel.
JPS5464387A (en) Semi-submerged ship
US2430380A (en) Ship hull
US1776319A (en) Boat
JPS57147981A (en) Shape of rear half portion of hull
US1760696A (en) Boat
GB355981A (en) Improvements in the form of ships' hulls
SU30563A1 (en) Form of aft single-screw vessel
US1729544A (en) Ship's hull
JPS5464383A (en) Semi-submerged multiple hull ship