You need to check your air consumption. This is much more important than your speed. Do equal 30 minutes dives in different fins and compare your air consumption rates between the dives.
Tech fins?
- Thread starter Darian Dunn
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Se7en
Contributor
The strict adherance to jet fins is the one part of DIR that doesn't really make sense to me.
In everything else, it seems that the best component is used for the job at hand, and it choice logically explained.
For fins - the answer seems to be 'jet fins cause we like em'.
The choice of these fins seems to fly against what every other piece of research shows for fin efficiency - ie split fins are more efficient. Amongst the paddle fins, the jetfins don't even rate that highly.
Or perhaps I'm just trying to justify keeping quattros, and I just imagine they are better than jetfins (which a mate of mine does have, and I did try out of curiosity. I did NOT take him up on the offer to swap for my quattros
)
Or is the logic that you should be scootering anyway, so you should use the most manouverable fins, not the most efficient?
Mike
In everything else, it seems that the best component is used for the job at hand, and it choice logically explained.
For fins - the answer seems to be 'jet fins cause we like em'.
The choice of these fins seems to fly against what every other piece of research shows for fin efficiency - ie split fins are more efficient. Amongst the paddle fins, the jetfins don't even rate that highly.
Or perhaps I'm just trying to justify keeping quattros, and I just imagine they are better than jetfins (which a mate of mine does have, and I did try out of curiosity. I did NOT take him up on the offer to swap for my quattros
)Or is the logic that you should be scootering anyway, so you should use the most manouverable fins, not the most efficient?
Mike
Hi Mike,
BTW our cars are powered by the same brand of engine at least.
About those Jets....
They are not the only DIR fin....
The Turtles are just fine
I can't tell you about the Quattros since I have never tried them but I do have an old pair of the early Avantis that I could give a try...
But you hit the nail close to the head with your last statement....
Manouverability is the key.... that and the weight of the fin. Now I know that all the splitters think that their fins are more efficient at straight line propulsion but if we really needed speed it wouldn't be had by finning.... you got your 7 .... I got my Gavin.
as one to go against the grain, I would recommend Mares Avanti Quattro's. I have 6 pair (pink for first time dives with DIR guys) and swear by them. The exception is if you are wearing a drysuit. The quattro's are very light.
Thanks... then I won't bother digging them out.
Se7en
Contributor
I take it by 'weight of the fin' you are after a heavier fin? Is this to compensate for too much air in the legs of your drysuit? Or something else?
If a diver was to turn up for DIRF with a pair of fins that didn't present an entanglement hazard, and could demonstrate full manouverability as required by the course, would they still be failed on gear selection if those fins were not 'approved'?
Most of the time underwater I'm not in much of a hurry to go anywhere - I have dived without fins at all - so my fins are really there for power, not endurance. If I need to swim up, or against current (or downcurrent etc) or down to grab the weightbelt I didn't secure properly
I want as much power as I can get, for a short period of time. With quattros, I can exceed five knots over 50 metres - does your Gavin pull that hard? (As with the seven, it's acceleration that is useful, not sustained speed)
Mike
Se7en
Contributor
Originally posted by Uncle Pug
Thanks... then I won't bother digging them out.
Give it a go - quite a few drysuit divers use them around here - at worst you will amuse your dive buddies.
Mike
I prefer my silent-submersion, but I haven't had the opportunity to try a gavin. Anyone wanna lend me one for a couple of days?
I use quattro's exclusively now, but it took a little getting accustomed to in a TighT cave.
Just what are you offering here Mike and do you come with a lifetime warranty?Originally posted by Se7en
With quattros, I can exceed five knots over 50 metres - does your Gavin pull that hard?
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