SPONSON ATTACHMENT FOR AIRBOAT
A sponson attachment for an airboat allows the airboat to increase its safety and stability very quickly. A method for attaching a sponson to an airboat hull includes attaching first and second flexible tethers to a side of the sponson. The method also includes removably securing the first flexible tether to an exterior of the airboat hull adjacent a gunnel, and removably securing the second flexible tether below the first flexible tether on the exterior of the hull.
The present application claims priority from U.S. Provisional Application No. 62/252,106, filed on Nov. 6, 2015, the disclosure of which is hereby incorporated by reference in its entirety.
BACKGROUNDAir-propelled watercrafts, or airboats, use air-propulsion to propel flat-bottom hulled boats through waterways. Traditionally, the boats include a rear mounted propeller that extends above the hull of the boat. Such watercrafts are relatively compact, allowing them to maneuver through brush, reeds, or other low-water conditions. However, these airboats have drawbacks. For example, in the case of open water conditions, and in particular in windy conditions where currents or waves may be significant, traditional airboats become unstable and could capsize. This is partly due to the fact that airboats tend to utilize hulls with low sides and have comparatively tall propeller assemblies, making the boats top heavy. Additionally, there exist other conditions in which it is unsafe to operate an airboat, such as in inclement weather conditions.
For these and other reasons, improvements are desired.
SUMMARYThe present disclosure relates generally to a sponson attachment for an airboat hull to improve the safety and stability of the airboat. In one possible configuration, and by non-limiting example, the sponsons are inflatable and removably attached at the sides of an airboat hull.
In a first aspect of the present disclosure, a method for attaching a sponson to an airboat hull is disclosed. The method includes attaching a first and second flexible tether to a side of the sponson. The method also includes removably securing the first flexible tether to an exterior of the airboat hull adjacent a gunnel. The method also includes removably securing the second flexible tether below the first flexible tether on the exterior of the hull.
In a second aspect of the present disclosure, an airboat hull sponson retrofit kit is disclosed. The kit includes an inflatable sponson that has a first and second tether attached to a side thereof. Each tether has an attachment cylinder secured to an end. The kit also includes a first tether attachment for attaching to an airboat hull. The first tether attachment includes a channel that is configured to receive the attachment cylinder of the first tether. The kit also includes a second tether attachment for attaching to the airboat hull, and the second tether attachment also includes a channel configured to receive the attachment cylinder of the second tether.
A variety of additional aspects will be set forth in the description that follows. The aspects can relate to individual features and to combinations of features. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the broad inventive concepts upon which the embodiments disclosed herein are based.
The following drawings are illustrative of particular embodiments of the present disclosure and therefore do not limit the scope of the present disclosure. The drawings are not to scale and are intended for use in conjunction with the explanations in the following detailed description. Embodiments of the present disclosure will hereinafter be described in conjunction with the appended drawings, wherein like numerals denote like elements.
Various embodiments will be described in detail with reference to the drawings, wherein like reference numerals represent like parts and assemblies throughout the several views. Reference to various embodiments does not limit the scope of the claims attached hereto. Additionally, any examples set forth in this specification are not intended to be limiting and merely set forth some of the many possible embodiments for the appended claims.
The removably attachable sponson kit disclosed herein has several advantages. The kit allows an existing airboat to be retrofitted to include a pair of floatable sponsons secured to the hull of the airboat. The sponsons provide the airboat with additional buoyancy, which increases the safety of the airboat. Additionally, the sponsons provide the airboat with additional stability, allowing the airboat to safely traverse deeper and rougher water while decreasing the likelihood of the boat capsizing and/or submerging if capsized.
An airboat 100 is shown in
The hull 102 can be configured in a variety of ways to haul a variety of different cargo loads. In some embodiments, the hull can include a rider deck with a plurality of seats. In other embodiments, the hull can be configured to haul cargo. In the depicted embodiments, the hull is a flat-bottomed hull. Further, the hull 102 is constructed of metal or other hard, resilient material. In some embodiments, the hull 102 is constructed of aluminum. The hull 102 includes a front 108, a rear 110, a left side 112, and a right side 114. As shown, the front 108 of the hull 102 includes an upward sloping bottom 116. At the rear 110 of the hull 102, the propeller assembly 104 is attached. At both the left and right sides 112, 114, removable sponsons 106 are mounted to the hull 102.
The propeller assembly 104 is shown schematically in
In the embodiment shown, the airboat 100 includes the first sponson 106a and the second sponson 106b attached at the sides 112, 114 of the hull 102. Specifically, the first and second sponsons 106a, 106b are inflatable and removably attached to the hull 102. The sponsons 106a, 106b provide stability and flotation to the airboat 100 and enable the transport of loads or personnel. In some alternative embodiments, the sponsons may be rigid. In the depicted embodiment, the sponsons 106a, 106b follow the shape of the sides 112, 114 of the hull and are at least partially curved near the front 108 of the hull. For example, the sponsons can be substantially cylindrical, and be tapered at a front end (bow end) and/or a back end (stern end). In the example shown, the sponsons 106a, 106b are tapered at a front end, e.g., toward a bow of the airboat hull. Additionally, the sponsons can be of complementary shapes to be located along the hull, e.g., being mirror images of one another.
Other sponson shapes are also possible to accommodate a variety of differently shaped hulls. For example, the sponsons could be formed from a unitary tube, and form a U-shaped outer hull surrounding a front and both sides 112, 114 of the airboat 100. In such an arrangement a portion of the sponsons 106a-106b that spans across the front of the airboat may be raised relative to the side portions to reduce any possible drag caused by that portion. In example embodiments, the sponsons 106a, 106b can, when mounted to the hull, be located at a height above a water line of the airboat hull when the airboat is loaded to a predetermined degree (e.g., based on an average load, or based on a maximum load), thereby reducing drag caused by the sponsons 106a, 106b during normal operation of the airboat 100.
The sponsons 106a, 106b are preferably scratch and abrasion resistant, and thus, may endure for long periods in rough water environments, including swift water, white water, open sea, ice, snow, and shallow water mixed with rocks and/or vegetation. For example, the airboat 100 is designed to travel in high waves and/or shallow water. The sponsons 106a, 106b may also be unaffected by gas, oil, and diesel that may seep from the motor or from other external or internal sources. Due to their inflatable characteristics, the sponsons 106a, 106b act as bumpers and fenders and rebound off of objects (i.e., rocks, ice, other watercrafts, or the like) that may exist in the trajectory of the airboat 100 to which they are attached. In some embodiments, the sponsons 106a, 106b are made from polyurethane and are bullet-proof to 9 mm ammunition. In other embodiments, the sponsons 106a, 106b may be made from alternate materials and may be bullet-proof to varying degrees.
The sponsons 106a, 106b may also be equipped with one or more baffles, or separable chambers, within the sponsons 106a, 106b. The baffles promote floatation and prevent or mitigate the effects of vibrations, which are increased in rough water conditions. In other words, the baffles promote stability of the sponsons 106a, 106b, and ensure that a single puncture of a sponson would not immediately compromise flotation.
The first and second tethers 124, 126 are secured to the side 128 of the sponson 106a and are flexible. In some embodiments, the tethers are adhered to the sponson. In still other embodiments, they are stitched to the sponson 106a. In other embodiments, the tethers are manufactured from the same material as the sponsons 106a, 106b. Further, the tethers 124, 126 each include interfacing portions 136, 138 at ends 140, 142. In the depicted embodiment, the interfacing portion 136, 138 are cylinders that are configured to slide within the channels 132, 134 of the upper and lower attachment mechanisms 128, 130. The interfacing portions 136, 138 can be sized and shaped in variety of different ways so long as they match the size and shape of the channels 132 and 134.
The upper and lower attachment mechanisms 128, 130 can be constructed of metal or other resilient material. The upper attachment mechanism 128 is secured adjacent the gunnel 122 of the side 112. In the depicted embodiment, the upper attachment mechanism 128 is secured under a lip 144 of the gunnel 122. In some embodiments, the lip 144 can be secured to the hull 102 during the fitting of the sponson 106a. The lower attachment mechanism 130 is also secured at the exterior of side 112.
In one embodiment, the sponsons 106a, 106b and their respective tethers 124, 126, along with upper and lower attachment mechanisms 128, 130 for each side 112, 114 can be distributed as a retro-fit kit for airboats. This allows a user to removably attach the sponsons 106a, 106b to the airboat 100 when desired, allowing the user freedom to customize their particular airboat for specific applications.
The interior of main hull 202 can be configured in a variety of ways to haul a variety of different cargo loads. As depicted, the main hull 202 includes a bench 207 that is positioned longitudinally with respect to the main hull 202. In some embodiments, the main hull 202 can include a rider deck with a plurality of seats. In other embodiments, the main hull 202 can be configured to haul cargo. In the depicted embodiments, the main hull 202 is a flat-bottomed hull and is constructed of metal or other hard, resilient material. In some embodiments, the main hull 202 is constructed of aluminum. Like the hull 102 described above, the main hull 202 includes a front 208, a rear 210, a left side 212, and a right side 214. As shown, the front 208 of the main hull 202 includes an upward sloping bottom. At the rear 210 of the main hull 202, the propeller assembly 204 is attached. At both the left and right sides 212, 214, the sponson holders 206a, 206b are attached to the main hull 202. In some embodiments, the sponson holders 206a, 206b may be rigidly attached the main hull 202. In other embodiments, the sponson holders 206a, 206b may be integral with the main hull 202.
The sponson holders 206a, 206b are configured to hold inflatable sponsons (shown in
Referring to
The various embodiments described above are provided by way of illustration only and should not be construed to limit the claims attached hereto. Those skilled in the art will readily recognize various modifications and changes that may be made without following the example embodiments and applications illustrated and described herein, and without departing from the true spirit and scope of the following claims.
Claims
1. A method for attaching a sponson arrangement to an airboat hull, the method comprising:
- attaching a first flexible tether to a side of a sponson;
- attaching a second flexible tether to the side of the sponson;
- removably securing the first flexible tether to an exterior of the airboat hull adjacent a gunnel; and
- removably securing the second flexible tether below the first flexible tether on the exterior of the hull.
2. The method of claim 1, further comprising attaching a first tether attachment and a second tether attachment to the airboat hull, and wherein the first and second tether attachments include channels to removably secure the first and second flexible tethers thereto.
3. The method of claim 1, further comprising placing the sponson within a sponson holder mounted at the exterior of the airboat hull adjacent the gunnel.
4. The method of claim 1, wherein the gunnel is located along a first side of the airboat hull.
5. The method of claim 4, further comprising attaching a second sponson to the airboat hull, wherein attaching the second sponson to the airboat hull includes:
- attaching a third flexible tether to a side of a second sponson;
- attaching a fourth flexible tether to the side of the second sponson;
- removably securing the third flexible tether to an exterior of the airboat hull adjacent a second gunnel on an opposite side of the airboat hull from the gunnel; and
- removably securing the fourth flexible tether below the third flexible tether.
6. The method of claim 5, wherein attaching the first sponson and attaching the second sponson to the airboat hull positions the first and second sponsons in substantially parallel positions along the gunnel and the second gunnel of the airboat hull.
7. The method of claim 1, wherein the sponsons include a plurality of baffles.
8. An airboat hull sponson retrofit kit comprising;
- an inflatable sponson, the sponson having first and second tethers attached to a side thereof, each tether having an attachment cylinder secured to an end;
- a first tether attachment including a channel configured to receive the attachment cylinder of the first tether; and
- a second tether attachment including a channel configured to receive the attachment cylinder of the second tether.
9. The airboat hull sponson retrofit kit of claim 8, further comprising:
- a second inflatable sponson having first and second tethers attached to a side thereof, each tether having an attachment cylinder secured to an end;
- a third tether including a channel configured to receive the attachment cylinder of the third tether; and
- a fourth tether attachment including a channel configured to receive the attachment cylinder of the fourth tether.
10. The airboat hull sponson retrofit kit of claim 9, wherein the inflatable sponson has a first shape contoured to fit along a gunnel of an airboat hull, and wherein the second inflatable sponson has a second shape contoured to fit along a second gunnel of the airboat hull opposite the gunnel.
11. The airboat hull sponson retrofit kit of claim 10, wherein the second inflatable sponson has a shape that is a mirror image of the inflatable sponson.
12. The airboat hull sponson retrofit kit of claim 10, wherein, when mounted to the airboat hull, the inflatable sponson and the second inflatable sponson are located above a waterline of the airboat hull.
13. The airboat hull sponson retrofit kit of claim 10, wherein each of the inflatable sponson and the second inflatable sponson includes a plurality of baffles.
14. The airboat hull sponson retrofit kit of claim 10, wherein the inflatable sponson has a tapered end oriented to be attached toward a bow of the airboat hull.
15. The airboat hull sponson retrofit kit of claim 10, further comprising a first sponson holder and a second sponson holder rigidly attached to first and second sides of the airboat hull.
16. The airboat hull sponson retrofit kit of claim 15, wherein the first sponson holder and the second sponson holder each has a half-moon cross-sectional shape.
17. The airboat hull sponson retrofit kit of claim 16, wherein the half-moon cross-sectional shape has a convex shape.
18. The airboat hull sponson retrofit kit of claim 16, wherein the half-moon cross-sectional shape has a concave shape.
19. The airboat hull sponson retrofit kit of claim 16, wherein the first sponson holder and the second sponson holder each include a plurality of rails.
20. An airboat comprising;
- a fan propeller;
- a motor coupled to the fan propeller;
- a hull, wherein the motor powers the fan propeller, and the fan propeller propels the hull in a forward direction; and
- a first and second inflatable sponson secured to the hull, each sponson being selectively removable from the hull and each being contoured to fit along opposite gunnels of the hull respectively, the an inflatable sponsons each having a plurality of tethers attached to a side thereof, each tether having an attachment member secured to an end; and
- a plurality of sponson attachments secured to the hull, each sponson attachment including a channel, wherein each sponson attachment is configured to receive an attachment member of a tether.
Type: Application
Filed: Nov 7, 2016
Publication Date: Jun 22, 2017
Inventor: Billy Miller (Embudo, NM)
Application Number: 15/345,069