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has anyone see asymetric fins for TT's??

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Created by Plummet > 9 months ago, 3 Nov 2013
Plummet
4862 posts
3 Nov 2013 1:17PM
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ie one side foil shaped. the other side flat. Like outer fins on a surfboard?

stamp
QLD, 2791 posts
3 Nov 2013 3:29PM
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what would the point be? you ride a twintip primarily on its edge. the fins just give a bit of tracking

Plummet
4862 posts
3 Nov 2013 2:49PM
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Trying different thinks out on my mutant. That is one of the things I want to try.

I want to see what the difference is on the wave face.

the truth
QLD, 189 posts
3 Nov 2013 8:38PM
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the later model lunacys came with assy fins and they felt better riding too

Mark _australia
WA, 23477 posts
3 Nov 2013 8:51PM
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Big difference.
After 30yrs on smaller waveboards, somebody has finally tried it for sidefins on windsurf boards (quads and thrusters) and the results are worth investigating.
Google K4 Fins "ezzy assymetrical" and see if applicable to what u r doing Plummet.

Also consider toe-in as the water is not running straight along the longitudinal axis of your board. It doesn't on a surf / windsurf board so I doubt it does on your twinny, and toe in can be quite effective in reducing drag and increasing wave performance. Given the edging it will be a bit different but there can be great effect realised in experimenting with such things.

Plummet
4862 posts
4 Nov 2013 1:20AM
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interesting info. Yes I have toe in on my board. However too much toe in can give you a squirrely feely when that fin is going backwards.

I'll check out the lunacy fins.

Adrian Roper
93 posts
4 Nov 2013 4:35AM
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We built some asymmetric fins, some 70/30 some more like 90/10. We tried them facing in, facing out and compared them to std 50/50 fins. Could not find any noticeable difference.
The fins on a TT just provide tracking and in my opinion the depth, area and durability are the main points to play with

Plummet
4862 posts
4 Nov 2013 5:35AM
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Select to expand quote
Adrian Roper said..

We built some asymmetric fins, some 70/30 some more like 90/10. We tried them facing in, facing out and compared them to std 50/50 fins. Could not find any noticeable difference.
The fins on a TT just provide tracking and in my opinion the depth, area and durability are the main points to play with


Did you try them in the wave face with your mutant/TT?

I'm looking ways to improve my mutants wave performance.

KIT33R
NSW, 1716 posts
4 Nov 2013 11:02AM
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On my Shinn Wave "mutant" I ride with a tri fin set up at the back. The right-side fin (which is in the water toe side since I'm a natural footer) is as large as the centre fin (both about 120mm deep) and the left side fin is 50mm deep (heel side when riding normally). The two fins at the front are smaller again (40mm which is all you need when riding the thing tail first).

This configuration gives me more bite in the forehand bottom turns and for carving a deep forehand turn on flat water.

Adrian Roper
93 posts
4 Nov 2013 10:12AM
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Plummet said..

Adrian Roper said..

We built some asymmetric fins, some 70/30 some more like 90/10. We tried them facing in, facing out and compared them to std 50/50 fins. Could not find any noticeable difference.
The fins on a TT just provide tracking and in my opinion the depth, area and durability are the main points to play with


Did you try them in the wave face with your mutant/TT?

I'm looking ways to improve my mutants wave performance.


no this was more on a twintip just edging and carving, we have surf fins on our twin wave. They are 80mm centre and 70mm side fins, all 5-/50 foil.
The biggest difference that made this board work was the rails which have a full tucked edge in the centre transitioning back to a std twintip rail at the back. This stops the bounce and allows the board and fins to carve.

KIT33R
NSW, 1716 posts
4 Nov 2013 2:02PM
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^^ Would have to agree with Adrian here. The Shinn lacks decent surfboard style rails midship. This would improve the wave riding considerably.

Adrian Roper
93 posts
4 Nov 2013 2:38PM
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KIT33R said..

^^ Would have to agree with Adrian here. The Shinn lacks decent surfboard style rails midship. This would improve the wave riding considerably.


Will have one at Merimbula for testing for anyone interested, quite a special board I think.....

Plummet
4862 posts
4 Nov 2013 3:09PM
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Cheers that's interesting advice.

I'll think about doing a wrapped rail for my next board. Its getting pretty technical for bloke building his own boards in his garage with hand tools.

jeff2
WA, 221 posts
4 Nov 2013 3:20PM
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I have a mutant Airush 150 sidewinder.
it has assymetric fins as standard fitment .
the middle fins I replaced with some naish 0175 they are also assy profile but more of a twin tip shape.
I find it works really well on bigger waves .



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"has anyone see asymetric fins for TT's??" started by Plummet