New Idea?

[Dewit2it]

I was thinking about the design of monofins and had an idea. My idea is to change the angle of the fin to the footpocket so that the blade is inline with the leg and not the foot. This could allow attachment to the lower leg and help reduce strain on the foot. It could also increase power on the upward stroke by preventing the fin from going vertical and loosing power. Just take a look at a fish or dolphin. The fin axis is in line with the body and not at an angle to it.

What do you think?

 

[Jon]

There have been many posts on this, you can use the search function on the top of the forum, and some companies have already put angled blades on their monofins. I have two monofins with angled blades on them and it does make a difference in how streamlind you are during the sink faze of your dive- for those of us without that great ankle flexability.:head

Check out Leaderfins or Special Fins to see some of their angled monofins. Waterway also has some new angled monofins, but the angle of their blade's aren't quite as great as the others I just mentioned.

As far as the ankle braces go, I remember when Farallon came out with that exact same idea back in the late 70's- but it never caught on.

Jon

 

[X-Fins]

hmmm.may be something like that??? can be????

 

[Dewit2it]

X-fins, your pic is similar but I'm looking to go more radical. The root of the fin would start at the ankle and not mid foot. It would be a longer fin to accomodate the footpockets. The only bad part would be that you wouldn't be able to stand on a starting block for finswimming.

 

[Jon]

Sounds like your looking for a fin like mine.

I have a Specialfins carbon freediver mono with Sporasub footpockets on it. They are full footpockets, just like on a pair of spearing fins, and can be worn for hours. There is an angle manufactured into the blade for better streamlining.

Another one to look at is the Waterway NEMO. My dive buddy, Ted, just bought one of these and the pockets are a bit softer than my Sporasubs- or the OMER on my old monofin.

There have been many threads posted on these types of fins.

Jon

 

[Sommerlund]

Just my humble opinion, Humm What I don't understand is why no one has made a monofin which connet close to your knees, that way you could lock the angle and, as i see it, get less powerloss from your legs to the monofin

 

[trux]

Just my humble opinion, Humm What I don't understand is why no one has made a monofin which connet close to your knees, that way you could lock the angle and, as i see it, get less powerloss from your legs to the monofin

I am afraid it would it would not work well at all. The lever is too short, hence the amplitude and the power you could generate quite small. Then, with a fin at your knees, it couldn't freely flex - at fins, most of the forward power does not come at all from the upwards/downwards motion, but rather from the flexed fin.

 

[Sommerlund]

hummm, i am sorry i did not explain my self correctly. I get the lever principle. I did not mean the fin should be at your knees. Still a monofin with the fin at the tip of your toes (as we know it) but a connection sys. that instead of going arund you heels ran up to you knees, and that way locked your anckles, thus you could still flex your knee and get the up/down motion

 

[trux]

That is was what Dewit2it suggested, and what (as Jon said) Farallon did without a great success - you can see the Farallon fins in my [ame="http://forums.deeperblue.net/showthread.php?t=67558"]Collection Of Weird Fins[/ame].

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Still, I think it may be worth of trying, but I am afraid that the costruction would be rather heavy, sensitive to damage and corrosion, and it would also make the manufacturing much more expensive, so it is probably not really well suited for mass production.

 

[Sommerlund]

lol look at them of cause they did not succeede, but do not let that knock you out. i believe that you must cast it in rummer make a mold and then cast it in rubber that is what i would do

 

[Bill]

Originally Posted by Sommerlund
Just my humble opinion, Humm What I don't understand is why no one has made a monofin which connet close to your knees, that way you could lock the angle and, as i see it, get less powerloss from your legs to the monofin

You described the attachment method of the aqueon. The inventor has had some amazing results with it.