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Thread: What fin size?

  1. #1
    Junior Member
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    Default What fin size?

    Hello!

    What fin/size would be a good choice?

    RRD X-fire 122L
    RAM F12 8.6kvm
    Weight 80 kg?

    /oskar

  2. #2
    Senior Member Asle's Avatar
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    A good slalom fin around 50 cm.

  3. #3
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    That big for an 80 kilo guy? I would have said 44.

  4. #4
    Senior Member Asle's Avatar
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    Quote Originally Posted by richarli View Post
    That big for an 80 kilo guy? I would have said 44.
    Big wide board and a big sail. I think 50 is right.

  5. #5
    Senior Member mark62's Avatar
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    Hey Oskar, to be honest, you will have problems with a 50cm (sorry Asle). The OFO (one foot off) on your 122 is around 48cm so the 50cm way to big.

    As a guide, your best with a 42cm to 46cm depending on the fin brand. Size for size, different brands/shapes will give less or more power. Check out different brands for info one power etc.

    There's loads of good fins out there, but take a look at:

    F-hot 44cm

    Select S10 44cm or V-max 46cm

    Tectonic Talon 46cm
    Last edited by mark62; 10th April 2013 at 12:18 AM.

  6. #6

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    Can I stick my head in here?

    If you race or want early planing or top speed then adding the longest fin you can 'hold down' brings benefits.

    So the wider the board (especially at the tail) and the heavier you are, the longer fin you might choose – because you can hold it down with the leverage on offer.

    If, however you just want to plane early enough, to head upwind OK and to keep the board manoeuvrable in the turns, then you can get away with a much shorter fin.
    That fin size choice then relates to the sail size you use, with less fin area needed the smaller rig you use.

    You mention a rig size of 8.6m – and that will need a big fin, up to 5ocms


    However, with a 7.8 cambered sail, I'd use a 44cms fin as the maximum fin length with this board, and I'd prefer an even shorter fin for fun sailing with that sail size.

    So you can use fin length to fine-tune this board – I'd say the range is between 50cms and 30cms – with the latter suiting the board better when used with 7m rigs.
    Blank space

  7. #7
    Senior Member Asle's Avatar
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    Quote Originally Posted by mark62 View Post
    Hey Oskar, to be honest, you will have problems with a 50cm (sorry Asle). The OFO (one foot off) on your 122 is around 48cm so the 50cm way to big.

    As a guide, your best with a 42cm to 46cm depending on the fin brand. Size for size, different brands/shapes will give less or more power. Check out different brands for info one power etc.

    There's loads of good fins out there, but take a look at:

    F-hot 44cm

    Select S10 44cm or V-max 46cm

    Tectonic Talon 46cm
    No problem! It is only good if he can get better advice.

    My thinking was along the select fin selector and the 81 cm width of the board with light wind, early planing and screaming up wind in mind. But I do not know that exact board.

    http://www.select-hydrofoils.com/en/...d-slalom-race/

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