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 Post subject: mirage turbo fins
PostPosted: Thu Dec 01, 2011 4:55 pm 
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Joined: Tue Apr 13, 2010 10:07 pm
Posts: 169
Can anyone tell me if the Turbo fins get better or worse with wear? The reason I ask is that I used a friends drive with newer turbo fins and they had much less resistance than mine, they seemed to provide less propulsion as well. I checked the various settings and tensions and both were the same, the only difference was the distortion in the fins. Neither have bottomed out and bent, mine are 15 months old and have been well used, the other fins looked new.


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 Post subject: Re: mirage turbo fins
PostPosted: Thu Dec 01, 2011 9:11 pm 
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Joined: Sat Nov 12, 2005 10:46 pm
Posts: 3017
Location: Escondido
Fin performance does not seem to alter over time, but rather due to condition (warped fin, jagged rear edge can reduce performance). More likely the Drives are set up and/or lubed differently. Drive friction varies greatly with cable tension and lube. This becomes apparent if you operate the Drives (by hand) out of the water.

There are three generations of fin material, each with a slightly different feel. I assume your 15 month old fins are the latest. There is no marking to identify the difference.

Of course, how the fins are mounted (variations in the outhaul clew setting) noticeably affects both performance and resistance.

Just guessing, but I suspect different Drives using the same fins can vary up to about 30% in performance depending on how everything is set-up and maintained. 8)


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 Post subject: Re: mirage turbo fins
PostPosted: Thu Dec 01, 2011 10:07 pm 
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Joined: Tue May 18, 2010 2:31 pm
Posts: 3068
Location: Kailua 96734
,... And inserted. :lol:

I would have your dealer look at them and adjust the tension.

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