Flapping inverting foil (patent pending)

Discussion in 'Boat Design' started by frogger1225, Sep 7, 2014.

  1. myark
    Joined: Oct 2012
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    myark Senior Member

    Hi Frogger
    I found this boat design link posted by Yipster and reminded me of your invention.
    This idea pictured attached could be advanced such as if it had a spring release system that allowed to fold all the way back when moving leg upwards then when the pressure to bring leg downwards the flapper would spring open under the force of water for thrusting.
    It could designed into a normal pair of shoes so it can be used to walk on land especially if muddy it could act like snow shoes and stop sinking into soft ground.

    Fishing is a strenuous sport. Okay, not really. Usually you are sitting in a boat or sitting on the bank of a river or lake, slowly tossing your line in the water, slowly reeling it in and slowly losing your bait. But there is one type of fishing that can give you a decent workout. It's float fishing. It's still pretty darn relaxing and it's just about the ultimate in low tech transportation. Essentially you sit in a rubber floating chair and paddle your way to where the fish are. But paddles are hard to store and easy to lose, so our inventor invented the Fin Flappers. Not a bad idea really, they strap onto your boots and fold flat when walking on land or pushing your foot forward while floating. When you pull your leg backwards, the fin opens up and grabs the water, slowly propelling you forward. From the looks of our floating friend, with his bushy beard and lack of fishing pole, he may have been floating out there for weeks. If you see him, give 'em a tow, will ya?

    Attached Files:

  2. wavepropulsion
    Joined: May 2010
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    wavepropulsion Pirate Member

    Interesting the last advances in this issue. I think I will start a Kapipal, I had some ideas for watching the Flintstones and Reading the thread. We use prehistoric paddles and sails, why not a prehistoric powerboat? Yabadabadoo!
  3. JSL
    Joined: Nov 2012
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    JSL Senior Member

    Mr Darwin would be impressed.
    As previously noted by others, you can also face aft and use regular diving fins.... and see where you've been. If you really want to see where you're going, fit some rear view mirrors but keep in mind that things may appear smaller than they are. Especially important if your greeters on shore look 'serious' and are wearing white coats, etc
    Last edited: May 31, 2016
  4. BMcF
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    BMcF Senior Member

  5. myark
    Joined: Oct 2012
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    myark Senior Member

    WaterBlade is a motorized water Surfing board that simulates the feeling of walking on water. Great work out for Legs, ABS & Gluteus.


    We have Created a brand new Sport. We Called "WaterBlading"

    Be one of the Pioneer of this New Sport.

    If you love Stand Up Paddle Boarding, this is the perfect combination to work out your lower body to accomplish your work out. Exercise your Legs tights and gluteus WaterBlading.
  6. kerosene
    Joined: Jul 2006
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    Location: finland

    kerosene Senior Member

    At $2000 waterblade is a dud

    Its in every aspect low end, trolling motor hacked to an inflatable slow blob is nit going to gather 2000 dollars worth of curiosity.
  7. frogger1225
    Joined: Aug 2014
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    frogger1225 Junior Member

    All has gone well. Patent paid for and just waiting for the release from the USPTO. Meanwhile development has been awesome. The Frogger affect works well with water borne transportation devices. Check out the following videos :)

    Kayak paddle utilizing patent Frogger design

    Arm paddles for swimming
  8. frogger1225
    Joined: Aug 2014
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    Location: Pennsylvania

    frogger1225 Junior Member

    It's official. USPTO #9702368 9702368.jpg
  9. marina16gt
    Joined: Jul 2017
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    Location: London, UK.

    marina16gt New Member

    A little known fact...The best open bladed propellers are only 69% efficient! Some of the reasons for this are that the rotating propeller blades throw some of the water off sideways due to centrifugal force, instead of in the direction you want...Then there the losses due to slippage, cavitation and hydrodynamic drag. Add a close fitting Kort nozzle (as used on many tugboats) and you can regain up to a further 17% in efficiency, as this prevents water being thrown off sideways by CF. But even then, you never get anywhere near 90% efficiency and the nozzle itself increases drag, negating the nozzles advantages. A properly designed "whale tail" (horizontal) or "fish tail" (Vertical) flapping underwater wing/s (or fin/s), on the other hand, can achieve much higher efficiency levels...as much as 99%! Decades ago, after discovering this, I envisioned an easy way to take advantage of a wings greater efficiency...Convert an outboard motor from prop drive to flapping wing drive! You can remove the vertical power shaft, the gears, the prop shaft and the prop itself as none of these are required in the wing powered version. The engine itself will need to be turned and remounted, to convert it from a vertical crankshaft to a horizontal one (or simply replace it with one already designed for horizontal work). You fit a narrow slider rail onto the back of the leg, faired in as best you can to reduce drag, and fit a horizontal crank mechanism to the flywheel of the engine (driven either directly or via a chain and sprockets, or via belt drive and pulleys...The latter two options will allow the user to reduce or increase the vertical travel produced by the crank. This crank will move a sliding rod inside the slider rail, via a connecting rod (in other words, converting rotary motion into up and down motion). The middle of the leading edge of the wing (swept back for greater hydrodynamic efficiency) connects to the bottom of the sliding rod, and voila, you have flapping wing drive! To go into reverse, it will be necessary to turn the outboard about 180 degrees...A novel steering system will be needed to achieve this!

  10. gonzo
    Joined: Aug 2002
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    gonzo Senior Member

    Now you will have to prove your outlandish claims to sell the product.
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