New Fin Technology

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New Fin Technology

Unread postby nomastomas » Tue Feb 02, 2016 4:57 pm

Interesting application of foil theory, and the use of computational fluid dynamics. Reminds me of Chrisp work on a much smaller scale.

http://www.thequantumfin.com/the_quantum_fin_(q-fin).html
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Re: New Fin Technology

Unread postby CHRISPI » Tue Feb 02, 2016 6:01 pm

Cool I love it, a bit small, but they are on the right path ?
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Re: New Fin Technology

Unread postby nomastomas » Tue Feb 02, 2016 7:16 pm

I thought it was funny when he said his early design didn't work because it "lifted right out of the water".
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Re: New Fin Technology

Unread postby Uncle Grumpy » Tue Feb 02, 2016 8:17 pm

Velzy first did a V (AKA Butterfly) fin way back when he was working with Hap Jacobs and was still working with them off and on into the 80's .

Image

It was only a matter of time until some "innovator" added a third fin and I'm not certain this "quantum" is the first one...

On a related note, we recently had a board donated to SHACC that has 7 fin boxes.
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Re: New Fin Technology

Unread postby nomastomas » Tue Feb 02, 2016 9:39 pm

I would see the "innovation" more as the use of Computational Fluid Dynamics modeling to determine foil, template and AOA of all fins, instead of trial-and-error. Recently others, WaveGrinder to name one, have used a similar hi-tech approach to design fins. Wilkes has over 30yr surfing/shaping experience, and combining that with the hi-tech guys he's working with adds up to a pretty competent design team. Priced at US$170, fin may be slow to catch on.
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Re: New Fin Technology

Unread postby Uncle Grumpy » Wed Feb 03, 2016 12:04 pm

nomastomas wrote: Priced at US$170, fin may be slow to catch on.

like a glacier ;)
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Re: New Fin Technology

Unread postby belly rider » Fri Mar 18, 2016 10:10 am

Got a very similar fin from Dale Velzy when he was still alive
and confirm that this style fin was originally a work design of Dale and Hap
Was wondering if a three fin version would not be too much drag when installed 8-)
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Re: New Fin Technology

Unread postby krusher74 » Sat Apr 23, 2016 12:33 pm

Hmmmmm :?

Here is the video https://www.youtube.com/watch?v=-Al2OFizntI

https://www.youtube.com/watch?v=HcW3yKyiSg4

I think FCS/futures might have something to say about there being no change in fin tech in the last 34 years.

When a company throughs out statements like that I tend to throw them in the pool with politicians.

The surfers look slow to average in the video. :(
Last edited by krusher74 on Sun May 01, 2016 7:53 am, edited 1 time in total.
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Re: New Fin Technology

Unread postby rodndtube » Sat Apr 23, 2016 12:41 pm

Seems like a lot of torque from a 3-fin-unifin on a single fin box. Keith, you are spot-on about the claim of the first fin innovation in 30 yrs.
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Re: New Fin Technology

Unread postby dr robert » Tue Apr 26, 2016 5:34 am

At the risk of sounding like a broken record. and/or shouting in the wilderness…take a look at the original , 3 fin Bonzer…first developed in 1970 by the Campbell Bros, and their dad Jack Campbell.
You may see some design/conceptual similarities...
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