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Follow up note: >Ahh, Ratliff's scoop fin? I shipped that back to him, and he let me know he got it. I included my test fin, and other assemblies for him to have 'fun' with. If that fun is interesting, I will post.

>"So again, in short, what is the point of this new fin again? To optimize for a kick that is oft and commonly not the main propulsive kick used by experienced and advanced divers? Who is it for, what is it for?" In short. Power and efficiency. Am I able to go farther or do better for less...

Which is posted here, and switching to 'open source', well actually 'free to humanity'. If I had the time and money, yes, I would have continued. Especially now that I know the next improvement needed. But, I can't, so anyone feel free to jump on it. I have just never seen the dynamic solution...

You know, the area this technology might be better at is.... "Oscillating Foils For Ship Propulsion" Although, the other tech I imagineered might be more suitable for that as well. I will post that to the 3dwarehouse on Sketchup.Google, as well as this design. I posted a kite boat there a few...

So I will make this one up on the spot... The final mastership for a true artist? A thick skin. :yeahbaby:

No problem bro; We sounded like we argued different sides, but we may be on the same page much more than it appears. All these issues are things that may be considered each time we plan a water born adventure, and how we equip our selves for it. Actually, I greatly appreciate your detailed...

I think you don't know where you are right now. This is not normal space where you are comparing the value of two or more existing options. This is the high risk area of the unknown. (just this one thread) This is where you try to ferret out what is possible or not. Here you do not assume it is...

When you look at the pressures around an air foil, most of the lift is in the front half, provided it is laminar flow. The implication for fins, if that dynamic holds up, the loading center for the foil would be closer to the foot than the regular fin. However, in my concept, the blade is held...

This is the dumbest comment ever. We will call that comment #1. The rest was sensible enough. In the past... Comment #1 then comes, we don't need to swim, we have boats. #1, followed by we don't need wheels we have feet. #1 then we don't need fins, we have hands if you would only learn to use...

Yep, I need to ship it back to him. Cool guy.

I guess I should make a few more comments. Simulation and wind tunnel testing? You are right that this fin has so many variables, such things are likely to come into to play, if there is any advantage to such improvements. But at this turn in the development, it's too basic. The concept needs...

Not nessary, at the basic level of t Yes, I built one set, and performed a kick-count test. I tested that against 8 other fins, including a Jet-Fin and a long fin. Everyone's objections and noted challenges definitely were represented in the first fin. Heavy? Check Complex? Check Excess load...

That concludes the discussion part of the patent. So, any questions?

In operation during a kick-stroke of the cable-fin, a foil experiences more pressure on one face. Supported at two points, the blade bends into a foil shape. This pulls on the cables on the convex side, and loosens on the concave side. These changes in length are transferred to the opposite...

This foil contains an internal frame structure, represented by image Fig 60 shown from the edge and Fig 61 showing one face. It is made of a firm but bendable silicone or plastic. In the structure, a void exists in section Fig 61-H and Fig 61-J to accommodate intertwining the loop cable...

Foil Embodiment #7 The sixth foil mechanism utilizes flexible cable loops. The cables slide inside of plastic sleeves (Fig 57). The sleeves a tube of slippery and flexible material such as Teflon, Nylon or polypropylene. The cable is packed with petroleum jelly inside the tube section as a...

Scanning across the width of Fig 53, the profiles would start with D. Then sequences of C-B-A-B until the end with a final C-B-A-D profile set. Fig 53-E illustrates use of 13 sections. The actual count is a selection based on trading off between complexity and finite control of the foil...

The cross-connected sections of paired chambers can be adjusted relative to each other. This will change the amount of leverage each has in controlling fluid flow. A larger chamber thickness in B compared to C will gave C more leverage. But in trade this will give B less dimensional change per...

Foil Embodiment #6 A sixth foil design presented in Fig 51 is based on hydraulics. The foil materials are elastic silicone with at least three different durometer values used. The foil contains a network of channels filled with a light oil. The channels collectively form 4 different chambers...

Foil Embodiment #5 Optional to using sheet plastic, a 3d print can also build up a skeleton of the foil in this fifth design. The images Fig 48 and Fig 49 indicates the difference in cross-section between sheet material and 3d print fabrication. As was the case with the sheet fabrication...