Vinny, the efficiency claims of the fins you see in dive shops are
usually based on forward (in-line) thrust only, and then only using a
standard flutter kick.  What you also have to consider is a fins
efficiency when using an anti-silting kick, when using the fin for
attitude control/turning, and when using a DPV.  You also do not want
to use an excessively bouyant fin.  The ScubaPro Jetfin (or similar,
such as Rockets, Turtles, etc.) is pretty good across the board, as
well as being constructed out of an extremely durable material.

The spring straps allow quick donning and doffing of the fin, and
eliminate the entanglement hazard of having a fin strap end dangling in
the breeze.  They were originally made by Farallon, then by Oceanic,
and were discontinued.  They are currently available through Jackie
Smith (mixdiver@in*.ne*), or you can make your own.  Instructions
can be found on Jim Cobb's site. 
(www.cisatlantic.com/trimix/trimix.html)

-Sean


On Fri, 5 Feb 1999 16:20:12 -0000, vpg wrote:

>I just watched the DIR II video, very impressive.
>
>There will be many questions to follow :)
>
>First up, who makes the jet fins you use, why jet fins - I would have
>thought the more recent fins were more efficient ? One thing I am very
>interested in is the spring strap, those fancy buckles on the Mares Quattros
>are a pain, regularly come loose. So Im up for new fins anyway, anyone give
>me a more detailed description on how to put those straps together??????
>
>Thanks for your time.
>
>Working on going DIR, sorting order out this week with Halcyon for explorer
>wings - is 45 IB best size for steel doubles with canister lights etc or 55
>IB ?
>
>Regards,
>
>
>
>Vinny
>
>--
>Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'.
>Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
>




--
Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'.
Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.

Navigate by Author: [Previous] [Next] [Author Search Index]
Navigate by Subject: [Previous] [Next] [Subject Search Index]

[Send Reply] [Send Message with New Topic]

[Search Selection] [Mailing List Home] [Home]