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Date: Wed, 08 Aug 2001 20:24:44 -0400
Subject: Re: Split fins
From: Jim Cobb <cobber@ci*.co*>
To: terry michael <OEA51@go*.co*>,
     "Kent O. Bonde"
CC: <techdiver@aquanaut.com>
Oh you poor saps who bought split fins. Unfortunately for you this
technology has already been eclipsed by Aries. From "Skin Diver" magazine,
the known authority on all things underwater. Yes, the same people who said
that split fins were the be-all and end-all of diving:

------------
AERIS Velocity Fin
This fin is based on the concept of three "power enhancing vents" cut into
the middle of the blade, allowing water to flow through during the kick.
When tested, we found that this reduces stress on the legs, while
accelerating the flow of water over the blade. The overall result was an
increase in the efficiency of each kick and a boost in speed.
-------------

I suppose you guys could take some sewing thread and stitch the split back
up on your split fins making damn sure you leave open "power enhancing
vents" so you can "increase in the efficiency of each kick and a boost in
speed."

Excuse me while I stand aside so I won't get trampled by you victims of
marketing as you stampede to the dive shop to pick up your pair.

As the greatest marketer of all time said of suckers; "There's one born
every minute".

   Jim

 -------------------------------------------------------------------
 Learn About Trimix at http://www.cisatlantic.com/trimix/

> From: terry michael <OEA51@go*.co*>
> Date: Wed, 08 Aug 2001 09:10:25 -0700 (PDT)
> To: "Kent O. Bonde" <kentbonde@ci*.mi*.fl*.us*>
> Cc: techdiver@aquanaut.com
> Subject: Re: Re: Split fins
> 
> No I'm happy to hear all about them, it makes it easier to know whom to
> observe. Though I normally stay away sometimes I'm up for a good laugh so I
> stay and watch from a distance taking notes on the stupidity...:-)
> 
> 
> -----Original Message-----
> From: "Kent O. Bonde"<kentbonde@ci*.mi*.fl*.us*>
> To: "'terry michael'"<OEA51@go*.co*>, "'Don Burke'"<donburke56@ne*.ne*>,
> techdiver@aquanaut.com
> Date: Wed Aug 08 07:41:05 PDT 2001
> Subject: Re: Split fins
> 
>> Does it really matter what the hell people think about split fins???
>> 
>> -----Original Message-----
>> From: terry michael [mailto:OEA51@go*.co*]
>> Sent: Wednesday, August 08, 2001 2:16 AM
>> To: Don Burke; techdiver@aquanaut.com
>> Subject: Re: Re: Split fins
>> 
>> 
>>>> If the smaller fin puts less water in the wrong direction, less surface
>>> area
>>>> is needed.
>> 
>> Don, give it up, you don't have any idea about what you are talking about.
>> Where do you come up with this stuff?
>> 
>> 
>> 
>> -----Original Message-----
>> From: "Don Burke"<donburke56@ne*.ne*>
>> To: "terry michael"<OEA51@go*.co*>, techdiver@aquanaut.com
>> Date: Tue Aug 07 10:42:40 PDT 2001
>> Subject: Re: Split fins
>> 
>>> If I want shit from you, I'll floss your teeth.
>>> 
>>> ----- Original Message -----
>>> From: terry michael <OEA51@go*.co*>
>>> To: <techdiver@aquanaut.com>
>>> Sent: 06 August, 2001 11:38
>>> Subject: Split fins
>>> 
>>> 
>>>> Don, You may be lost the "Pampers" are over in the "baby" section along
>>> with the "propeller" fins and other "baby" toys. Maybe you should find
>>> yourself a good shower cap with a little fringe around the sides to
>> critique
>>> instead...:-) thanks
>>>> 
>>>> ...............
>>>> 
>>>> From: Joe Citelli <joe@po*.co*>
>>>> 
>>>>> How could a fin with less surface area and rigidity possibly generate
>>> more
>>>>> thrust in the water than a fin with greater surface area and rigidity?
>>>> 
>>>> If the smaller fin puts less water in the wrong direction, less surface
>>> area
>>>> is needed.
>>>> 
>>>> If the flex in a fin causes more water to go straight back, the flex is a
>>>> good thing.
>>>> 
>>>> An extension of your argument is the use of a 4 by 8 sheet of plywood on
>>>> each foot.  Since that doesn't seem to work very well, perhaps the
>>>> hydrodynamic problem is a bit more involved than just surface area and
>>>> rigidity.
>>>> 
>>>>> People like them because they are easy to kick with.
>>>> 
>>>> Perhaps
>>>> 
>>>>> But you travel less distance.
>>>> 
>>>> That isn't how I interpret the test results I have seen.
>>>> 
>>>>> Personally, I'd rather kick hard once to cover a given distance
>>>>> than kick easy three times.
>>>> 
>>>> I doubt the ratio is that high.  In any case, isn't the figure of merit
>>> gas
>>>> consumption for distance traveled?
>>>> 
>>>>> The manufacturers simply had nothing to sell so they made this up.
>>>> 
>>>> Perhaps, although the test results do look encouraging.
>>>> 
>>>>> Funny how people that buy this kind of stuff typically keep going back
>>> to
>>>> the
>>>>> stuff in their garage that works.
>>>> 
>>>> I'm watching all of this.  They have my attention.  Perhaps one day
>>> they'll
>>>> get my money.
>>>> 
>>>> The entanglement issue needs to be addressed.  I touch my line with a fin
>>> at
>>>> least once a dive and don't need anything else to wrap the line around.
>>>> 
>>>> I saw a fin with vents down the center in one of the magazines and
>> perhaps
>>>> that is the wave of the future.
>>>> 
>>>> The best performers seem to have the blade bent downward in a sort of
>>>> "ballerina set."  It would not surprise me to find that much improvement
>>>> comes from that.
>>>> 
>>>> Don Burke
>>>> Chesapeake, Virginia
>>>> 
>>>> 
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>>>> 
>>> 
>>> 
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>> 
>> 
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>> Get Your Free, Private E-mail at http://mail.go.com
>> 
>> 
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>> 
> 
> 
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> Get Your Free, Private E-mail at http://mail.go.com
> 
> 
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