EP1931560A2 - Non-planing boat hull - Google Patents

Non-planing boat hull

Info

Publication number
EP1931560A2
EP1931560A2 EP06750785A EP06750785A EP1931560A2 EP 1931560 A2 EP1931560 A2 EP 1931560A2 EP 06750785 A EP06750785 A EP 06750785A EP 06750785 A EP06750785 A EP 06750785A EP 1931560 A2 EP1931560 A2 EP 1931560A2
Authority
EP
European Patent Office
Prior art keywords
hull
aft
bow
stern
topsides
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.)
Withdrawn
Application number
EP06750785A
Other languages
German (de)
French (fr)
Inventor
Wesley Terran Baylor
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.)
Lear Baylor Inc
Original Assignee
Lear Baylor Inc
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 Lear Baylor Inc filed Critical Lear Baylor Inc
Publication of EP1931560A2 publication Critical patent/EP1931560A2/en
Withdrawn legal-status Critical Current

Links

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
    • 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

  • the present invention generally relates to hull construction for a small boat and is more particularly directed to an improved hull construction for an electric boat, which provides maneuverability and stability along with low wake generation.
  • Boat hulls may be classified generally as flat bottom, V-bottom, and round bottom.
  • V-bottom hulls tend to have a sharper entry into the water, which provides for a smoother ride in rough water, however, they generally require more power to achieve the same speed.
  • the bow when a hull is moved forward through the water, the bow generates a bow wave and the stern generates a stern wave and a transverse wave.
  • pressure waves directed downward may also be produced, which are generally by both a sharp and blunt end sterns .
  • Such waves may also present a hazard to other vessels and can be a source of damage to embankments or shoreline structures.
  • the present invention is directed to a non-planing boat hull, which produces little or no wake.
  • a non-planing boat hull in accordance with the present invention generally includes a forward portion having a bow with the forward portion having a width tapering smaller from a beam toward the bow.
  • An aft portion of the hull includes a stern and the aft portion includes a width tapering smaller from the beam toward the stern.
  • a keel is provided and disposed along a hull centerline with the keel having a back supporting a propeller and a forward height tapering smaller toward the bow.
  • Fore topsides extending from the beam to the bow include an arcuate convex transition to the hull forward portion.
  • the aft topsides extend from the beam to the stern and include an arcuate concave transition to the hull aft portion with the aft topside forming approximately a 90° angle with a transom.
  • the aft topsides further join the hull aft portion with the convex surface near a waterline of the hull.
  • the hull forward and aft portions form a teardrop shaped waterline, as well as providing a teardrop shaped displacement volume.
  • the hull forward and aft portions form a relatively flat bottom and the waterline and displaced volume are generally unchanged at hull speeds up to about 6 knots.
  • the hull is smooth and includes no chines or strakes .
  • Figure 1 is a perspective view of a non-planing boat hull in accordance with the present invention generally showing a forward portion having a bow and an aft portion having a stern along with a keel disposed along a hull centerline;
  • Figure 2 is a side view of the hull shown in Figure 1;
  • Figure 3 is a side view similar to Figure 2 detailed with index lines and dimensions;
  • Figure 4 is a plan view of the non-planing hull in accordance with the present invention clearly illustrating a teardrop shaped waterline and a teardrop shaped volume displacement along with index lines corresponding to those shown in Figure 3 ;
  • Figure 5 is a rear plan view of the boat hull in accordance with the present invention detailed with index lines and dimensions corresponding to those shown in Figures 3 and 4 ;
  • Figure 6 is a front view of the hull in accordance with the present invention illustrated with index lines and dimensions corresponding to the index lines shown in Figures 3-5.
  • a non-planing boat hull 10 in accordance with the present invention which generally includes a forward portion 12 having a bow 14 with the forward portion 12 having a width tapering smaller from a beam indicated as index number 7 on Figure 3 toward the bow as is most clearly shown in Figure 4.
  • An aft portion 18 includes a stern 20 and the aft portion includes a width tapering smaller from the beam toward the stern 20.
  • the hull 10 is preferably- formed from conventional marine fiberglass materials and, as shown includes no chines or strakes.
  • a keel 24 is formed along a centerline (see Figure 4) and includes a back 32 for supporting a propeller shaft 34 and includes a forward portion 38 tapering smaller towards a bow 14, as most clearly shown in Figures 1-3.
  • Figures 3-6 include index numbers as shown along with dimensions, particularly describing the shape of the non- planing boat hull 10 in accordance with the present invention, the dimensions enabling a hull 10 to have a teardrop shaped waterline, as well as a teardrop shaped displacement volume as represented by the line 50 in Figure 4.
  • teardrop shaped waterline replacement volume remain constant independent of hull speed up to about 6 knots.
  • Corresponding volume displacement shapes indicated by the line 52 illustrates that despite loading of the hull, the teardrop shaped displacement remains relatively constant.
  • Fore topsides 54 extend from the beam to the bow 14 and include an arcuate convex transition to the hull forward portion 12, as most clearly shown in Figure 6.
  • Aft topsides 58 extend from the beam to the stern 20 and include an arcuate concave transition 62 to the aft hull portion 18, as most clearly shown in Figure 5.
  • aft topsides 58 form approximately a 90° angle with a transom 66 and, as further shown in Figure 5, the aft topsides 58 join the hull aft portion with a convex surface 70 near the waterline 46.
  • the hull forward and aft portions 12, 18 form a relatively flat bottom 74 with stability provided by the keel 24.
  • wile the hull design provides for movement through water with little or no wake, the keel provides for stability and maneuverability, especially at low speeds.

Abstract

A non-planing boat hull includes a forward portion having a bow with the width tapering from a beam toward the bow and an aft portion having a stern with the aft portion having a width tapering smaller from the beam toward the stern. A keel is provided and disposed along the hull centerline for stability with the keel having a back supporting a propeller shaft and a forward height tapering smaller toward the bow. Fore topsides are provided and extend from the beam to the bow and include an arcuate convex transition to the hull forward portion. Aft topsides extend from the beam to the stern and include an arcuate concave transition to the hull aft portion with the aft topside further forming approximately a 90° angle with a transom and joining the hull aft portion with a convex surface near the waterline of the hull. The fore and aft portions form teardrop shaped waterline and displacement of volumes for the hull.

Description

NON-PLANING BOAT HULL
The present invention generally relates to hull construction for a small boat and is more particularly directed to an improved hull construction for an electric boat, which provides maneuverability and stability along with low wake generation.
Boat hulls may be classified generally as flat bottom, V-bottom, and round bottom.
Boats with flat bottom hulls generally have a shallow draft and while they may plane easily, unless the water surface is perfectly flat, they tend to give a rough ride because of the flat bottom pounding on each wave. They also tend to be less stable and require careful balancing of the load.
V-bottom hulls tend to have a sharper entry into the water, which provides for a smoother ride in rough water, however, they generally require more power to achieve the same speed.
Boats with round bottom hulls generally move easily through the water, especially at low speeds, however they tend to roll.
With regard to the wave generation when a hull is moved forward through the water, the bow generates a bow wave and the stern generates a stern wave and a transverse wave. In addition, pressure waves directed downward may also be produced, which are generally by both a sharp and blunt end sterns .
Generation of these waves does not improve the efficiency or the seaworthiness of the boat and in addition waste a great deal of energy.
Further, such waves may also present a hazard to other vessels and can be a source of damage to embankments or shoreline structures.
The present invention is directed to a non-planing boat hull, which produces little or no wake.
SUMMARY OF THE INVENTION
A non-planing boat hull in accordance with the present invention generally includes a forward portion having a bow with the forward portion having a width tapering smaller from a beam toward the bow.
An aft portion of the hull includes a stern and the aft portion includes a width tapering smaller from the beam toward the stern.
A keel is provided and disposed along a hull centerline with the keel having a back supporting a propeller and a forward height tapering smaller toward the bow.
Fore topsides extending from the beam to the bow include an arcuate convex transition to the hull forward portion. The aft topsides extend from the beam to the stern and include an arcuate concave transition to the hull aft portion with the aft topside forming approximately a 90° angle with a transom. The aft topsides further join the hull aft portion with the convex surface near a waterline of the hull.
More particularly, the hull forward and aft portions form a teardrop shaped waterline, as well as providing a teardrop shaped displacement volume.
This waterline and displacement volume results in little or no wake with hull speeds of up to about 6 knots.
More particularly, the hull forward and aft portions form a relatively flat bottom and the waterline and displaced volume are generally unchanged at hull speeds up to about 6 knots.
Further, the hull is smooth and includes no chines or strakes .
BRIEF DESCRIPTION OF THE DRAWINGS
The advantages and features of the present invention will be better understood by the following description when considered in conjunction with the accompanying drawings in which:
Figure 1 is a perspective view of a non-planing boat hull in accordance with the present invention generally showing a forward portion having a bow and an aft portion having a stern along with a keel disposed along a hull centerline;
Figure 2 is a side view of the hull shown in Figure 1;
Figure 3 is a side view similar to Figure 2 detailed with index lines and dimensions;
Figure 4 is a plan view of the non-planing hull in accordance with the present invention clearly illustrating a teardrop shaped waterline and a teardrop shaped volume displacement along with index lines corresponding to those shown in Figure 3 ;
Figure 5 is a rear plan view of the boat hull in accordance with the present invention detailed with index lines and dimensions corresponding to those shown in Figures 3 and 4 ; and
Figure 6 is a front view of the hull in accordance with the present invention illustrated with index lines and dimensions corresponding to the index lines shown in Figures 3-5.
DETAILED DESCRIPTION
With reference to Figures 1 and 2, there is shown a non-planing boat hull 10 in accordance with the present invention which generally includes a forward portion 12 having a bow 14 with the forward portion 12 having a width tapering smaller from a beam indicated as index number 7 on Figure 3 toward the bow as is most clearly shown in Figure 4.
An aft portion 18 includes a stern 20 and the aft portion includes a width tapering smaller from the beam toward the stern 20.
It should be appreciated that the hull 10 is preferably- formed from conventional marine fiberglass materials and, as shown includes no chines or strakes.
A keel 24 is formed along a centerline (see Figure 4) and includes a back 32 for supporting a propeller shaft 34 and includes a forward portion 38 tapering smaller towards a bow 14, as most clearly shown in Figures 1-3.
Figures 3-6 include index numbers as shown along with dimensions, particularly describing the shape of the non- planing boat hull 10 in accordance with the present invention, the dimensions enabling a hull 10 to have a teardrop shaped waterline, as well as a teardrop shaped displacement volume as represented by the line 50 in Figure 4.
Importantly, these teardrop shaped waterline replacement volume remain constant independent of hull speed up to about 6 knots. Corresponding volume displacement shapes indicated by the line 52 illustrates that despite loading of the hull, the teardrop shaped displacement remains relatively constant. Fore topsides 54 extend from the beam to the bow 14 and include an arcuate convex transition to the hull forward portion 12, as most clearly shown in Figure 6.
Aft topsides 58 extend from the beam to the stern 20 and include an arcuate concave transition 62 to the aft hull portion 18, as most clearly shown in Figure 5.
In addition, the aft topsides 58 form approximately a 90° angle with a transom 66 and, as further shown in Figure 5, the aft topsides 58 join the hull aft portion with a convex surface 70 near the waterline 46.
As is also evident from Figures 5 and 6, the hull forward and aft portions 12, 18 form a relatively flat bottom 74 with stability provided by the keel 24.
Thus, wile the hull design provides for movement through water with little or no wake, the keel provides for stability and maneuverability, especially at low speeds.
Although there has been hereinabove described a specific non-planing boat hull in accordance with the present invention for the purpose of illustrating the manner in which the invention may be used to advantage, it should be appreciated that the invention is not limited thereto. That is, the present invention may suitably comprise, consist of, or consist essentially of the recited elements. Further, the invention illustratively disclosed herein suitably may be practiced in the absence of any element, which is not specifically disclosed herein. Accordingly, any and all modifications, variations or equivalent arrangements which may occur to those skilled in the art, should be considered to be within the scope of the present invention as defined in the appended claims.

Claims

WHAT IS CLAIMED IS:
1. A non-planing boat hull comprising: a forward portion having a bow, said forward portion having a width tapering smaller from a beam toward said bow; an aft portion having a stern, said aft portion having a width tapering smaller from the beam toward said stern; a keel disposed along a hull centerline, said keel having a back supporting a propeller shaft and a forward height tapering smaller toward said bow; fore topsides extending from said beam to said bow and including an arcuate convex transition to the hull forward portion; aft topsides extending from said beam to said stern and including an arcuate concave transition to the hull aft portion, said aft topside forming approximately a 90° angle with a transom, said aft topsides joining with the hull aft portion with a convex surface near a waterline of said hull .
2. The hull according to claim 1 wherein the hull forward and aft position from a teardrop shaped waterline.
3. The hull according to claim 2 wherein the hull forward and aft portion form a relatively flat bottom.
4. The hull according to claim 2 wherein the waterline is unchanged at hull speed up to about 6 knots. IVUI c;: in ικ, ■■i! u..cr
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5. The hull according to claim 1 wherein the hull forward and aft portion from a teardrop shaped displacement volume .
6. The hull according to claim 5 wherein the hull forward and aft portion form a relatively flat bottom.
7. The hull according to claim 6 wherein the displacement volume is unchanged at hull speeds up to about 6 knots.
8. A non-planing boat hull comprised: a forward chineless and strakeless portion having a bow, said forward portion having a width tapering smaller from a beam toward said bow; an aft chineless and strakeless portion having a stern, said aft portion having a width tapers smaller from the beam toward the stern,- a keel disposed along a hull centerline, said keel having a back supporting a propeller shaft and a forward height tapering smaller toward said bow; fore topsides extending from said beam to said bow and including an arcuate convex transition to the hull forward portion,- aft topsides extending from said beam to said stern and including an arcuate concave transition to the hull aft portion, said aft topside forming approximately a 90° angle with a transom, said aft topsides joining with said aft portion with a convex surface near a waterline of said hull.
9. The hull according to claim 8 wherein the hull forward and aft position from a teardrop shaped waterline.
10. The hull according to claim 9 wherein the hull forward and aft portion form a relatively flat bottom.
11. The hull according to claim 9 wherein the waterline is unchanged at hull speed up to about 6 knots.
12. The hull according to claim 8 wherein the hull forward and aft portion from a teardrop shaped displacement volume .
13. The hull according to claim 12 wherein the hull forward and aft portion form a relatively flat bottom.
14. The hull according to claim 12 wherein the displacement volume is unchanged at hull speeds up to about 6 knots.
EP06750785A 2005-04-19 2006-04-19 Non-planing boat hull Withdrawn EP1931560A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/109,572 US20060231003A1 (en) 2005-04-19 2005-04-19 Non-planing boat hull
PCT/US2006/014833 WO2006113846A2 (en) 2005-04-19 2006-04-19 Non-planing boat hull

Publications (1)

Publication Number Publication Date
EP1931560A2 true EP1931560A2 (en) 2008-06-18

Family

ID=37107255

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06750785A Withdrawn EP1931560A2 (en) 2005-04-19 2006-04-19 Non-planing boat hull

Country Status (3)

Country Link
US (1) US20060231003A1 (en)
EP (1) EP1931560A2 (en)
WO (1) WO2006113846A2 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US873614A (en) * 1907-01-25 1907-12-10 Victor M Salo Motor-boat.
US2630094A (en) * 1948-01-30 1953-03-03 Hacker John Louis Combination shaft strut and housing
US2729183A (en) * 1953-03-18 1956-01-03 Samuel P Owen Inboard motorboat hull of the planing type having a cavitation plate
US3140686A (en) * 1960-04-11 1964-07-14 Olivotti Elia Hull of special stabilized shape
USD407366S (en) * 1998-04-20 1999-03-30 Badsey William J Boat

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006113846A3 *

Also Published As

Publication number Publication date
US20060231003A1 (en) 2006-10-19
WO2006113846A3 (en) 2009-05-07
WO2006113846A2 (en) 2006-10-26

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