This relates to the field of boats and, more particularly, to adjusting the wake a boat produces.
Watersports such as waterskiing, wakeboarding, and wakesurfing involve propelling a person behind a boat using the boat's power, but the optimal wake for each of these sports is different. In waterskiing, the wake is preferably as small as possible to provide a smooth skiing surface. In wakeboarding, the wake is preferably larger than it is for waterskiing to provide a ramp for aerial stunts. In wakesurfing, the wake should be high enough and have enough curl to propel a person surfing behind the boat without a rope.
In the past, watersports boats were not well equipped to allow the boat operator to adjust the size and shape of the boat's wake. But in recent years, boat makers have developed wake-shaping devices that allow the operator to tune the wake to meet the requirements of a particular watersport.
A watersport that has become very popular the last several years is called wake surfing. In wake surfing, a person rides a board behind a boat and is propelled forward by surfing on the boat's wake. If the wake is large enough, one can surf the wake without being towed by a rope. Modern wake surfing systems generate surf wakes, essentially by digging a hole in the water behind and on one side of the boat. This washes out the wake produced by one side of the boat and creates surfable wave behind the boat.
A wake adjustment system, a boat having wake adjustment capability, and a method of adjusting boat wake are described here in connection with a boat including a hull having a bottom side with a running surface extending from a bow to a stern along a longitudinal hull centerline.
An example of the wake adjustment system includes a pair of wake adjustment devices that are mountable to the stern in opposed positions about the centerline. Each wake adjustment device has a mounting member at the forward end of the device that can mount the device to the boat and an extension member having a forward edge connected to the mounting member. The extension member extends aft the mounting member to a first pivot axis that extends horizontally across the extension member from an outboard side to an inboard side thereof. The first pivot axis is non-parallel to the forward edge of the extension member. A water deflector is connected to the extension plate at the first pivot axis and is rotatable about the first pivot axis for varying a degree of wake adjustment.
Another example of the wake adjustment system includes a wake adjustment device mountable to the stern along the centerline. The wake adjustment device includes mounting member at a forward end of the device that can mount the device to the boat. An extension member has a forward edge connected to the mounting member. The extension member extends aft the mounting member to a port side pivot axis extending horizontally across the extension member from an outboard side to an inboard side thereof and a starboard side pivot axis extending horizontally across the extension member from an outboard side to an inboard side thereof. A port side water deflector is connected to the extension member at the port side pivot axis. The port side water deflector is rotatable about the port side pivot axis for varying a degree of wake adjustment. A starboard side water deflector is connected to the extension member at the starboard side pivot axis. The starboard side water deflector is rotatable about the starboard side pivot axis for varying a degree of wake adjustment.
An example the boat includes a pair of wake adjustment devices mounted to the boat aft the stern trailing edge in opposed positions about the centerline. Each wake adjustment device has a water deflector pivotally attached to the wake adjustment device along a first pivot axis that is non-parallel with the stern trailing edge. Each water deflector is rotatable about the pivot axis so as to modify the boat's wake. A control system in communication with each wake adjustment device is operable to impart rotation about each first pivot axis to each water deflector independent of the other water deflector to make a surf wake behind the boat.
Another example of the boat includes a pair of water deflectors mounted to the boat aft the stern trailing edge proximal to the centerline and in opposed positions about the centerline, each water deflector being a pivotally attached to the boat along a first pivot axis, each water deflector being rotatable about the first pivot axis so as to modify the boat's wake. A control system in communication with each wake adjustment device is operable to impart rotation about each first pivot axis to each water deflector independent of the other water deflector to make a surf wake behind the boat.
A method of generating a surf wake behind a boat includes imparting rotation to a water deflector of a wake adjustment device mounted to a stern of a boat on either a port or starboard side of the centerline in such a way that the water deflector deflects water that moved past the stern trailing edge and creates a surf wake behind the boat. The water deflector is rotatably connected to the wake adjustment device at a pivot axis that extends horizontally across the wake adjustment device and is non-parallel with the stern trailing edge.
An actuator connection system includes an actuator having first connection point at a first end thereof, a piston arm that is extendable and retractable, and a second connection point on the piston arm. A boat connection bracket is connected to the actuator at the first connection point or second connection point. The boat connection bracket has an actuator connector t is in contact with the actuator and is rotatable when the boat connection bracket is in a fixed position.
Certain examples of the wake adjustment device include a second pivot axis forward the first pivot axis. The second pivot axis allows for the device to be installed on boats having different shapes, such as differently sloped transoms.
Referring to
The running surface 104 extends from a bow 106 to a stern 108 along a longitudinal centerline 110 separating port P and starboard S sides. The boat 100 also includes opposed port and starboard sides 112p, 112s that extend vertically from the underside 103 to port and starboard gunwales 113p, 113s.
At the rear of the running surface 104 is a stern trailing edge 114 where water releases from the running surface 104 when the boat moves forwardly across it. The stern trailing edge 114 abuts the boat's transom. 116 and bisects the centerline 110. The centerline 110 defines a vertical plane 111 dividing the boat in half.
A propeller 118 moves the boat 100 at the desired velocity. The boat 100 drive system may be from an inboard, outboard, an inboard/outboard engine configuration, or any other conventional boat drive system, including, for example, a water jet drive.
The wake adjustment system 200 includes a port side wake adjustment device 202 and a starboard side wake adjustment device 204. Each wake adjustment device 202,204 is operably connected to an actuator 206 that is capable of moving the wake adjustment device to a desired position for adjusting the size and shape of the wake produced by the boat 100. In the example shown, the actuator 206 is a piston-like device such as those conventionally used to control boat trim tabs.
The actuator 206 is operably connected via control wiring 208 to a control system 210. The control system 210 is a programmable electronic device that allows the boat operator to control the wake adjustment system 200 by inputting desired parameters for the actuator 206.
The wake adjustment devices 202,204 are mounted to the boat 100 aft the stern trailing edge 114. In the example shown, the wake adjustment devices 202,204 are mounted along the transom 116 adjacent the running surface 104. In use, the wake adjustment devices 202,204 deflect water released from the stern trailing edge 114 as the boat 100 moves across the water to affect the boat's wake.
Details of an example of a starboard side wake adjustment device 204 are now described by referring to
The wake adjustment device 204 includes a mounting member 212 for attaching the device 204 to the boat 100, an extension member 214 extending aft from the mounting member 212, and a water deflector 216 extending aft from the extension member 214.
The mounting member 212 includes a first hinge plate 218 and a second hinge plate 220 connected together at a pivot axis Al defined by a first hinge 222. The second hinge plate 220 is affixed to the extension member 214 by an affixing mechanism such as fasteners, welds, or the like.
The angle at which the extension member 214 extends aft the running surface 104 may be adjustable. This feature makes the wake adjustment devices 202,204 adaptable to be mounted on boat hulls with different shapes. A pair of opposed brackets 224 are connected to the first hinge plate 218 for adjustably connecting the mounting member 212 to the extension member 214. The forward end of the extension member 214 abuts the first hinge 222. The angle at which the extension member 214 extends aft the running surface 104 is adjustable by rotating the extension plate 214 about the pivot axis A1. The angle may be locked into place by inserting a fastener into corresponding bracket holes 226 and extension member holes 228.
The extension member 214 includes top 230 and bottom 232 extension plate surfaces, which are substantially flat and extend laterally about the stern 108. A pair of opposed extension plate sides 234 are upturned from the extension plate top surface 230 at an angle of between about 70 to 110 degrees or about 90 degrees. The aft end of the extension member 214 includes another pivot axis A2.
The water deflector 216 is connected to the extension member 214 at the other pivot axis A2 via a second hinge 236 affixed to the bottom of the wake adjustment device 204. The water deflector is rotatable about this pivot axis A2 by operating the actuator 206. The water deflector 216 includes a top water deflector surface 238 and a bottom water deflector surface 240, which are substantially flat. An upturned water deflector side stiffener 242 extends upwardly from the top water deflector surface 238 on the outboard side of the water deflector 216. A downturned water deflector side stiffener 244 extends downwardly from the bottom water deflector surface 240 on the inboard side of the water deflector 216. The upturn and downturn angles are between about 70 to 110 degrees or about 90 degrees relative to horizontal.
As shown in
The wake adjustment system 200 may advantageously be used to form a surf wake behind the boat 100. A surf wake is a wake having a height and shape sufficient to propel a surfer behind the boat without a tow rope. In order to form a surf wake, of the two wake adjustment devices 202,204 is activated such that the water deflector 216 is angled down into the water at the second position.
The actuator 206 is attached to the wake adjustment device 202,204 at an actuator connection bracket 248. Referring back to
The actuator 206 may be attached to the bracket 248 at any of the plurality of piston connection points 250. Attaching the actuator 206 to a different piston connection point 250, changes the degree by which the water deflector 216 is able to rotate about the axis A2. This advantageously provides additional adjustability for installing on many different types of boats 100 with different hull designs.
The height and shape of the wake is adjustable by instructing the control system 210 to modify the angle about the water deflector axis A2 by adjusting the actuator's 206 degree of extension.
Some exemplary functions of the control system 210 are now described with reference to
The control system 210 stores program instructions on non-transitory processor readable memory M such as a magnetic memory device or the like. The control system 210 also includes a processor P that executes the program instructions. The processor P may be a computer-type processor such as a microprocessor.
The memory M includes program instructions that the processor P executes to control the actuators 206 according to different operational modes that the control system 210 via the processor P selects based on the boat's speed. The boat's speed corresponds to boat speed data 260, which is input into the control system 210 from a speedometer or the like adapted to measure the boat's speed. The memory M stores a preset minimum surf speed 262 and a preset maximum surf speed 264.
The operational modes include a surf mode 266 and trim tab mode 268. These operational modes are governed by the program instructions on the memory and are executed by the processor P.
When the boat is moving at a speed below the minimum surf speed 262, the processor P will cause the actuators 206 to be retracted to a non-surf position. In the non-surf position, the water deflectors 216 do not substantially deflect water that has moved past the stern trailing edge 114. An example of a preset minimum surf speed is about 5 mph.
The processor P selects surf mode 266 as, the operational mode when the boat's speed at a suitable and safe wake surfing speed, which is at or above the minimum surfing speed 262 up to and including the maximum surfing speed 264. In surf mode 266, the actuators 206 may be controlled manually by the boat operator by inputting the angle A2 of rotation that provides the desired surf wake. When one of the water deflectors 216 is rotated downward into a surfing position so that it deflects water substantially enough to create a surf wake, the control system 210 will move the other water deflector 216 to the non-surf position automatically. An example of a maximum surf speed is 19 mph.
The processor P selects trim tab mode 268 when the boat is moving at a speed greater than the maximum surf speed 264. The processor P will cause both water deflectors 216 to rotate to the non-surf position if either of the water deflectors 216 was in a surf position when the maximum surf speed 264 is exceeded.
In trim tab mode 268, the processor P advantageously operates the water deflectors 216 as conventional boat trim tabs that generate lift at the stern of the boat to adjust the boat's ride and planing angle. In trim tab mode 268, the control system 210 will restrict the angle of rotation about axis A2 so that the water deflectors 216 will only rotate a portion of their full rotational range of motion. If the full rotational range of motion about axis A2 is expressed as 100%, for example, the restricted range of motion in trim tab mode may be 1% to 50%, 1% to 40%, 1% to 30%, 1% to 25%, or 1% to 20%. The percentage refers to the percentage rotation about axis A2 relative to the full range of motion.
By way of example, if the full rotational range of motion of the water deflectors 216 is 90 degrees and the restricted range of motion is set to 25%, then, in trim tab mode 268, the water deflectors 216 will only be able to rotate downwardly by 25% of 90 degrees or by 22.5 degrees.
Referring to
The wake adjustment device 400 differs from the previously described wake adjustment devices 202,204 because the water deflectors 216 are connected to a common extension member 214 and the extension member 214 is connected to a different version of the mounting member 212.
In this case, the mounting member 212 and extension member 214 are connected at the first hinge 222 and the extension member 214 extends aft to a pair of second pivot axes A2 formed at a pair of second hinges 236. The second pivot axes A2 are non-parallel with the stern trailing edge 114 and form a V-shape across the extension member 214. The water deflectors are connected to the extension member 214 at the pair of second hinges 236 and are rotatable up and down about axis A2. The example of
The actuator 206 may be connected to the boat 100 using a boat connector bracket 400. Two examples of boat connector brackets 400 are shown in
The boat connection plate 402 includes an arm 406 that extends outwardly from the location of the through holes 401. The arm has a hole passing therethrough.
An actuator connector 404 is connected to the arm 406 via a mechanism that allows the actuator connector 404 to be rotatable about axis A3. That mechanism may be, for example, a threaded faster 410 and nut 412 combination or the like. In the examples shown, by loosening the nut 412 the actuator connector 404 is free to rotate in either direction.
The actuator connector 404 includes a solid body 414 defining a gap 416 extending through the solid body 414 between a pair of opposed appendages 418. Both of the opposed appendages 418 have an actuator pin receiving hole 420 passing therethrough.
In
The boat connection bracket is advantageous because conventional brackets that connect the actuator to surf tabs or trim tabs are not adjustable, which puts strict limitations on where the actuator has to be connected to the boat. The adjustability of the boat connector bracket 400 described here allows the installer a lot of flexibility as to where to attach the boat connector bracket 400 relative to where the surf tab or trim tab will be positioned.
This disclosure describes certain aspects and examples, but not all possible aspects or examples of the boat, wake adjustment system, wake adjustment device, or control system. Where a particular feature is disclosed in the context of a particular example, that feature can also be used, to the extent possible, in combination with and/or in the context of other examples. The boat, wake adjustment system, wake adjustment device, and control system may take many different forms and should not be construed as limited to only the examples described here.
This is a continuation-in-part of application Ser. No. 14/845,902, filed Sep. 4, 2015, which claims priority from provisional Application No. 62/114,202, filed Feb. 10, 2015, and provisional Application. No. 62/071,256, filed Sep. 19, 2014, which are incorporated by reference in their entireties.
Number | Date | Country | |
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62071256 | Sep 2014 | US | |
62114202 | Feb 2015 | US |
Number | Date | Country | |
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Parent | 14845902 | Sep 2015 | US |
Child | 15361893 | US |