inflatable boats

Mar 18, 2010 at 04:06 o\clock

The power of a kayaking comes from you and your paddle

by: fulong   Keywords: power, paddler, boat

This invention pertains to small keelless boats. Such boats, because they offer little resistance to leeway, cannot be sailed on the wind and canoes especially are difficult to paddle on a straight course, particularly by a single power paddler boat . Lee boards have been employed to minimize leeway in sailing canoes, but these have not been entirely satisfactory, among other reasons, because they often occupy valuable space in the vessel.

The power of a kayaking comes from you and your paddle. The different types of strokes take you where you want to go and can also save you from turning over or crashing into a rock. Practice with your paddle until it feels natural and you'll be a natural on the water.

Work on your strokes in calm water, so that you can concentrate on the proper execution of the strokes with the paddle. Sit in the kayak all the way back in the seat with knees slightly bent.
FIG. 1 is an elevation view showing one embodiment of the invention applied to a canoe.

FIG. 2 is a bottom plan view of the same canoe showing, in broken lines, an assymetric placement of the keel, for example, to correct the assymetric thrust of a single paddler boat .

FIG. 3 is a cross sectional view taken at plane 3--3 of FIG. 1 showing an arrangement of keel, flexible bracket and strap in accordance with the invention.

FIG. 4 shows the features of FIG. 3 in greater detail and, in broken lines, demonstrates sidewise displacement of the keel by elastic bending of the bracket as would occur, for example, on collision with an underwater object. Especially when double keels are employed as shown in FIG. 7, the bracket may be so selected as to deploy the keel outward to as much as about 45° from vertical. In a double keel embodiment as described, the keel shown in broken line in FIG. 4 would represent the starboard keel. Double keels may thus be splayed outward making easier the beaching of the boat.

FIG. 5 is a cross sectional view taken at plane 5--5 of FIG. 1 showing one means for securing a strap to the boat above water line 11.

FIG. 6 shows the features of FIG. 5 in top plan view.
Hold your power paddler boats with your hands an equal distance apart and from each end. It helps to imagine dividing the paddle in thirds, with your hands placed one third of the way from each end. You can also hold the paddle centered in front of you with your arms bent at a 90-degree angle; that will give you the correct spacing.
Make the common stroke with your paddle, the forward power stroke, by leaning forward to put the paddle in the water near your toes. Pull the blade straight back along the boat until it reaches your hip. Lift the paddle, and repeat on the other side.

The arrangement of elements are here described results in the single-keel configuration of FIG. 3 wherein the bow or stern sections are shown as items 18. The invention is not limited, however, to embodiments comprising a single keel. Using the same materials and methods, two parallel keels 12B can be provided as illustrated in FIG. 7. Furthermore, the double keels 12B may be oriented outwardly as shown in FIG. 4 in broken line such that keels makes an angle with the vertical of about 45°. This embodiment, which is comprised in claims has distinct advantage to the boatman who must beach his boat from time to time.

In some cases it may be useful, for example on flat bottom motor powered boats, to use more than two keels, possibly as many as five.

The electric inflatable boat in say a white water canoe normally maintains a straight course only with expenditure of considerable effort because of windage on the freeboard and unsymmetrical thrust from the single paddle. FIG. 2 illustrates a strategy; for overcoming this problem wherein the keel itself counteracts the forces causing the canoe to go off course. In the embodiment of FIG. 2, the canoeist has displaced the forward and aft straps. He could also achieve similar effect by displacing only the forward strap and bending the keel.

The keels are removed by reversal of the installation process.
Turn the kayak with a sweep stroke. Allow your paddle blade to arc away from the boat with the face of the blade addressing the water. This swings the bow of the boat in the opposite direction from the paddle blade.Practice the reverse sweep by making two strokes on the same side; first a power stroke, and then a sweep to turn the kayak in the opposite direction.
Correct steering when needed with the stern rudder. Place the power paddler boat  in the water near your hips, which drags the boat. Try not to use this stroke when surrounded by lots of waves.

 

 

source:blog.com

Mar 18, 2010 at 03:49 o\clock

Yeah,you can walk on water

by: fulong   Keywords: water, walking, ball

a pair of hulls having a length longer than their width, and each having sufficient buoyancy to support the weight of a person while standing on the hulls in the water,
a plurality of hinged rearwardly swinging propulsion flaps having their length parallel to the hull length and further having upwardly depending side legs on edges thereof parallel with the hull, each propulsion flap creating a cup-like resistance chamber when urged forward by the action of a person's feet in a water roller alternatively allowing one hull to slide forward effortlessly and the other to resist the water on the flaps, propelling the wearer forward,
a footwell in each hull having a top and a bottom, the footwell being wider and longer than a person's foot and disposed through an upper surface of the hull with the bottom below the water line near the hull center of gravity, further the footwell is narrower at the top than the bottom such that a person's foot may enter and yet provide support for a person's ankle, thereby decreasing the susceptibility of tipping,
a resilient shoe having attaching means, removably fastened to the bottom of each footwell providing means to maintain a person's foot therein and yet allow freedom of movement for the walking activity creating propulsion for the device, and,

Go to a frozen lake and walk out on the ice. There you go, you've walked on water.
Don't have a frozen lake near by? No problem, dump some ice out of your glass on the floor and stand on it. You might even win a bar bet with this one. Don't forget to give a cut of the winnings to the clean up staff.
Think ice is cheating? Use a water walking ball . There's another ehow article on this with a picture. It's a big clear plastic ball that you get zipped into. Once you're inside, and it's pumped up, you can roll around on the water by walking. You'll look like a floating hamster, but who cares. You're walking on water.

a plurality of hinged rearwardly swinging propulsion flaps having their length parallel to the hull length and further having upwardly depending side legs on edges thereof parallel with the hull, each propulsion flap creating a cup-like resistance chamber when urged forward by the action of a person's feet in a walking motion alternatively allowing one hull to slide forward effortlessly and the other to resist the water on the flaps, propelling the wearer forward,
a resilient shoe having attaching means, removably fastened to the bottom of each footwell providing means to maintain a person's foot therein and yet allow freedom of movement for the walking activity creating propulsion for the device, and,
The buoyant device as recited in claim 1 wherein said propulsion flaps further comprises a bevel on a side opposite said hinge such that the water is easily penetrated and rotates the flap open when rearward thrust is imposed on the hull by the zorb ball of a person.

Don't want to look like a hamster? Get some boats for your feet. I can't find anything commercial for this, but there seem to be high school competitions to build these. I've added links below to a couple of them, one with video, and one with a picture.
If you just want to look like you're walking on water, you can do it through illusion. All you need is a very thin layer of water over something solid. If the light's right the water won't be transparent and you'll appear to be walking on it. Platform shoes will help with the illusion. If you want it to be especially impressive and deal with transparent water, use something strong and transparent just below the surface.

a plurality of hinged rearwardly swinging propulsion flaps having their length parallel to the hull length and further having upwardly depending side legs on edges thereof parallel with the hull, each propulsion flap creating a cup-like resistance chamber when urged forward by the action of a person's feet in water walking balls alternatively allowing one hull to slide forward effortlessly and the other to resist the water on the flaps, propelling the wearer forward,
a resilient shoe having attaching means, removably fastened to the bottom of each footwell providing means to maintain a person's foot therein and yet allow freedom of movement for the walking activity creating propulsion for the device, and,
The present invention relates to devices for allowing a person to walk on water in general. More specifically, to a pair of buoyant hulls with propulsion flaps permitting the user to simulate water rollers for propulsion.

This application is identical to PCT application PCT/US90/02915 filed May 22, 1990 which is a continuation-in-part of PCT application PCT/US89/02390 filed May 30, 1989 now abandoned.

 

 

source:blog|water walking ball