AU2016203389B1 - Apparatus for generating a wave - Google Patents

Apparatus for generating a wave Download PDF

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Publication number
AU2016203389B1
AU2016203389B1 AU2016203389A AU2016203389A AU2016203389B1 AU 2016203389 B1 AU2016203389 B1 AU 2016203389B1 AU 2016203389 A AU2016203389 A AU 2016203389A AU 2016203389 A AU2016203389 A AU 2016203389A AU 2016203389 B1 AU2016203389 B1 AU 2016203389B1
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Australia
Prior art keywords
boat
blade
apparatus
water
wave
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AU2016203389A
Inventor
Marc Hanley
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Marc Hanley
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Publication date
Application filed by Marc Hanley filed Critical Marc Hanley
Priority to AU2016203389A priority Critical patent/AU2016203389B1/en
Publication of AU2016203389B1 publication Critical patent/AU2016203389B1/en
Priority claimed from PCT/AU2017/050358 external-priority patent/WO2017181237A1/en
Application status is Active legal-status Critical
Anticipated expiration legal-status Critical

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Abstract

Apparatus for generating a wave including a blade positioned rearward or alongside a boat or a or land-based structure, the blade having a leading section that redirects water from a 5 flow path travelling past the apparatus, up and across a face of the blade in order to generate a wave form behind or alongside the apparatus.

Description

APPARATUS FOR GENERATING A WAVE Field of the Invention

The present invention relates to a device for generating a wave particularly but not exclusively from a stem of a boat.

Background of the Invention

Recreational powerboats have been used to tow water skiers, wake boarders and/or people on other types of water toys. More recently, recreational powerboats have been designed and used to produce increased wake whereby the traditional tow rope is no longer required and the wake or shock wave created by the hull of the boat can be surfed using regular surfboards or design specific wake or skim boards. In these cases the powerboat produces a wake or shockwave in two parts. Firstly, the bow of the boat creates an initial wave crest and secondly the stern of the boat creates a second wave crest. Between these two wave crests the hull produces a wave trough. With a specialised hull design and substantial driving power through the water, a suitably shaped stem wave can be formed on which a person can surf. Such a stem wave is produced by the boat displacing water down to make the trough and the resultant water rising up at the stern of the boat forms a crest in the wake of the boat.

Object of the Invention

The present invention seeks to provide an alternative means of generating a wave. Summary of the Invention

In one aspect, there is provided a boat with an apparatus for generating a wave, the apparatus including a substantially vertical blade with a concaved aspect that projects outward into a flow path of water traveling past the apparatus and a leading section that is coupled with a hull of the boat forward of a stern; wherein the hull includes an inward curve relative to the flow path to form a concaved recess such that a wave trough is generated or enhanced, thereby priming the water flow favourably to rise downstream of said trough and upstream relative to the blade, and wherein the leading section transitions smoothly from the hull recess tangentially curving towards a trailing edge of the blade to redirect said primed water flow adjacent to the hull recess into a bow-wave type waveform, and wherein the blade is substantially vertical in order to generate substantially no downward load on the boat or apparatus as the boat moves through the water.

In one embodiment, the apparatus further includes a spoiler positioned at a rear side of the blade to divert water flow from the rear of the blade away from the trailing edge in order to allow for clean separation of the water propelled off the trailing edge of the blade.

In one embodiment, the blade is articulated to allow adjustment to the draft, angle, shape and/or position of the blade.

In one embodiment, the blade is retractable.

In one embodiment, the apparatus is fitted or retro-fitted directly to the boat.

In one embodiment, the apparatus includes port and starboard blades formed in accordance with the above described blade, with each blade forming a vertically oriented and outwardly flared hydrofoil either side of the boat.

Brief Description of the Drawings

The invention is described, by way of non-limiting example only, with reference to the accompanying drawings, in which:

Figure 1 is a side perspective view of a boat fitted with a wave generating apparatus;

Figure 2 is a rear perspective view of the boat;

Figure 3 is a top view of the boat;

Figure 4 is a perspective view of modified blades of another apparatus;

Figure 5 shows the apparatus generating waves;

Figure 6 is a perspective view of the boat generating waves;

Figure 7 is an enlarged view of the modified blades generating waves;

Figure 8 is a front perspective view of another boat with a wave generating apparatus;

Figure 9 is an enlarged view of the boat, illustrating the wave generation and curved hull profiled; and

Figure 10 is a front perspective view of the boat.

Detailed Description of the Invention

Figures 1 to 3 show a remote controlled boat 1 with a cabin 2 supported on dual hulls 3. A rudder 4 extends down from the cabin 2 and a propeller 5 projects rearward between the hulls 3.

The boat 1 is fitted with a wave generating apparatus 6, that includes port and starboard blades 7 attached relative to the hulls 3.

Each blade 7 has a leading section 8 in-line with the hull 3. The leading section 8 smoothly transitions into a downstream lateral wing 9 which has a vertical aspect that tangentially curves away from the hull 3.

Each blade 7 forms an outwardly flared hydrofoil with an elevated face 10 that curves over into a scooped upper portion 11 and a trailing edge 19 shaped such that water is propelled off the trailing edge in a lateral direction.

The apparatus 6 also includes a spoiler 12 to control water flow on an inboard side of the blade 7 and restrict unfavourable water flow behind the blades that might otherwise cause drag or downward load on the apparatus.

Figure 4 illustrates another boat 13 fitted with modified blades 14 that have a different shape to the blades 7 of Figures 1 to 3. The blades 14 have separately mounted upper portions 15. The blades 14 also have a trailing edge 19, as described above.

Figures 5 and 6 show the apparatus 6 in operation. The boat 1 is driven through water by the propeller 5 to generate a flow path 16 that runs parallel to the hulls 3. The wings 9 project into the flow path 16 so that water passes over the leading section 8 and is then lifted and redirected up over the elevated face 10 of the blade 7 to generate a wave 17. The blade has a trailing edge 19 shaped such that water is propelled off the trailing edge, in a direction laterally of the flow path 16. The spoiler acts to divert flow behind a rear of the blade away from the trailing edge in order to reduce drag or downward load and allow for clean separation of the water propelled off the trailing edge of the blade while the scooped upper portion 11 produces a clean overturning shape to the wave as it passes behind the boat 1.

The apparatus thereby generates waves by lifting or pushing water upward and outward, instead of requiring the boat to firstly displace the water downward in order to generate a wave. As such, wave generation is determined by the speed and shape of the blades through the water and not the water displacement capacity of the boat, allowing for substantially more range of control over the desired height and shape of the wave form.

Figure 7 shows the waveform produced from the trailing edge 19 of the modified blades 14 described with reference to Figure 4. As can be seen, the wave form 18 is generally taller and the overturning occurs later.

The shape and/or angle of the upper portions 15 can be adjusted, as required, in order to generate different overturning or breaking characteristics. It is also envisaged that the shape of the blade itself could be modified to change the wave form, as needed.

For the purpose of illustrating the principles of the apparatus 6, the invention has been demonstrated only in relation to use on remote controlled boats 1, 13, with the blades 7, 14 being fixed in place. However, it is envisaged a more advanced application of the invention is to have the blades mounted relative to the boat hulls via a mounting assembly that would allow for articulation of the blades and allow adjustment with respect to draft, angle and/or position, and possibly allow the blades to function as rudders to aid steering of the boat and/or be retracted entirely.

Figures 8 to 10 illustrate another boat 20 fitted with an apparatus 6, where like parts are denoted by like reference numerals. The boat 20 has matching port and starboard curved hull profiles 21. The leading section 8 of each blade 7 transitions smoothly from the curved profile 21, in a direction downstream of the profile 21. The profile 21 is shaped with an inward recess 22 to generate or enhance a trough in the flow path upstream of the blade 7, prior to the water being redirected up onto the blade 7, which enhances or primes the water flow favourably at the time it hits the blades 7.

The curved hull profile 21 is also tapered toward a bow 23 of the hulls 3 in order to minimise the bow wave and the resultant white water the bow wave produces. This is beneficial as it is more desirable to have a clean “green wall” wave generated by the apparatus 6 instead of having the wave chopped up by turbulent white water.

It should be appreciated from the above that the wing 9 on each blade 7 has little or substantially no horizontally inclined aspect which might otherwise cause the wing 9 to dive. If the wing had a horizontally inclined aspect, the blade 7 would tend to plough under the water and generate a downward load on the apparatus 6, which could be problematic for lighter boats and water craft given the stern of the boat would be pulled down and potentially flooded. In heavier boats, driver vision may be obscured as a result of the bow lifting in response to the stern being driven down into the water. With substantially no horizontally inclined aspect, the blade 7 is able to generate wave profiles simply by being driven through the water with sufficient power, regardless of the displacement weight of the boat.

It should also be appreciated that any horizontal aspect on the inboard side of the wing 9 and/or the blade 7 could exacerbate the downward load described above on the apparatus and be further problematic and the spoilers prevent this problem.

The apparatus has been described as having two blades 7 in line with the respective hull. However, the blades can be in spaced relation beside or behind the hulls 3 and still generate a suitable wave form or be used behind or either side of a single hull boat. Also, it is possible for the apparatus to have only a single blade and/or to be part of a structure that is towed through the water such as from a land-based installation instead of being mounted to the boat.

Many modifications and variations may be made to the apparatus without departing from the spirit and scope of the invention.

List of Parts 1. Boat 2. Cabin 3. Hull 4. Rudder 5. Propeller 6. Apparatus 7. Blade 8. Leading section 9. Wing 10. Face 11. Upper portion 12. Spoiler 13. Boat 14. Blade 15. Upper portion 16. Flow path 17. Wave 18. Waveform 19. Trailing edge 20. Boat 21. Profile 22. Recess 23. Bow

Claims (6)

  1. Claims
    1. A boat with an apparatus for generating a wave, the apparatus including a substantially vertical blade with a concaved aspect that projects outward into a flow path of water traveling past the apparatus and a leading section that is coupled with a hull of the boat forward of a stem; wherein the hull includes an inward curve relative to the flow path to form a concaved recess such that a wave trough is generated or enhanced, thereby priming the water flow favourably to rise downstream of said trough and upstream relative to the blade, and wherein the leading section transitions smoothly from the hull recess tangentially curving towards a trailing edge of the blade to redirect said primed water flow adjacent to the hull recess into a bow-wave type waveform, and wherein the blade is substantially vertical in order to generate substantially no downward load on the boat or apparatus as the boat moves through the water.
  2. 2. The boat of claim 1, further including a spoiler positioned on an inboard side of the blade to divert water flow at a rear of the blade away from the trailing edge in order to allow for clean separation of the water propelled off the trailing edge of the blade.
  3. 3. The boat of claim 1 or 2, wherein the apparatus is fitted or retro-fitted directly to the boat.
  4. 4. The boat of any one of claims 1 to 3, wherein part or all of the blade is articulated to allow adjustment to the draft, angle, shape and/or position of the blade.
  5. 5. The boat of claim 4, wherein the blade is retractable.
  6. 6. The boat of any one of claims 1 to 5, including port and starboard blades, wherein each blade forms a vertically oriented and outwardly flared hydrofoil either side of the boat.
AU2016203389A 2016-05-24 2016-05-24 Apparatus for generating a wave Active AU2016203389B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2016203389A AU2016203389B1 (en) 2016-05-24 2016-05-24 Apparatus for generating a wave

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2016203389A AU2016203389B1 (en) 2016-05-24 2016-05-24 Apparatus for generating a wave
PCT/AU2017/050358 WO2017181237A1 (en) 2016-04-20 2017-04-20 Wave generating apparatus

Publications (1)

Publication Number Publication Date
AU2016203389B1 true AU2016203389B1 (en) 2016-10-13

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AU2016203389A Active AU2016203389B1 (en) 2016-05-24 2016-05-24 Apparatus for generating a wave

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AU (1) AU2016203389B1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5911190A (en) * 1995-06-07 1999-06-15 Light Wave, Ltd. Boat activated wave generator
US6047657A (en) * 1999-07-19 2000-04-11 Cox; Steve Jon Surfable wave making device
US6105527A (en) * 1996-12-18 2000-08-22 Light Wave Ltd. Boat activated wake enhancement method and system
US7252047B1 (en) * 2005-09-20 2007-08-07 Baucom Jr Donald L Wave-forming apparatus for boats
US20130228115A1 (en) * 2011-09-16 2013-09-05 Malibu Boats, Llc Surf wake system for a watercraft
US20140026799A1 (en) * 2012-05-04 2014-01-30 Anthony Kalil Pivotal trim tab hull

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5911190A (en) * 1995-06-07 1999-06-15 Light Wave, Ltd. Boat activated wave generator
US6105527A (en) * 1996-12-18 2000-08-22 Light Wave Ltd. Boat activated wake enhancement method and system
US6047657A (en) * 1999-07-19 2000-04-11 Cox; Steve Jon Surfable wave making device
US7252047B1 (en) * 2005-09-20 2007-08-07 Baucom Jr Donald L Wave-forming apparatus for boats
US20130228115A1 (en) * 2011-09-16 2013-09-05 Malibu Boats, Llc Surf wake system for a watercraft
US20140026799A1 (en) * 2012-05-04 2014-01-30 Anthony Kalil Pivotal trim tab hull

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