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  1. #50
    Senior Member Navegante's Avatar
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    Quote Originally Posted by na-omi View Post
    Be great to hear a summary if you have time especially any more technical details about materials, construction and their attendant logic
    Ok a note first: heck of a lot of work translating from a second language to a third!

    Hi Ben, why have you decided to do two different models of Blade for 2015?
    When we started working with philip koster we needed to build some specific sails for him so that he could move on to the next level.
    Lighter and more reactive sails means that philip can go higher and with more control.
    It had been four years that we had prototypes made with this technology that were collecting dust in the loft so as soon as we had a chance we decided to do the finishing details to be able to market this model.


    Can you tell us something about this special build and the innovative materials used for the Blade pro?
    We've used the new hyperspider membrane that is very different than the normal x-ply film. Instead of using the film to distribute the weight and loads on the sail the hyperspider cloth uses Technora fibres to transfer the loads along specific and well determined lines. By doing this we managed to use much thinner film remarkably reducing the overall weight but never the less making the sail more resistant. We've always searched for ways of minimising the amount of stitching in our sails making sure we eliminate redundant seams or purely aesthetic ones with the purpose of reducing "useless" weight and maximising resistance.
    The hyperspider membrane brings everything to the next level reducing to the minimum the seams/stitching. The end result is a lighter sail with the least amount of stitching we have ever built, nearly 20% lighter than a normal Blade. This sails are unlike anything you've seen before.


    Why some sizes are not available? Like the 3.7, 4.0, 4.5 etc?
    The alignment of the Technora fibres along specific load lines allows us to have much more control over the shape of the profile. We achieved stabilising the foil much more easily respect of traditional sails, remarkably widening the wind range covered. On the upper section we pointed at improving the border (edge/angle?) of attack of the profile thus reducing the need to have so many sizes like before.
    We have also used the Hyperspider technology on the S1 Pro and there are many more sizes in that sail range.


    Are the blade and the blade pro different only in materials or in profile as well?
    There are some minor differences depending on a particular size but the basic style and general geometry is essentially the same as in the Blade. The immediate difference felt is in the softness and the lightness in the hands.


    When would you advice that a Severne client should get a Blade or a Blade Pro?
    The Blade Pro essentially has been created for all those riders at their top level and that are searching top performance. It's a luxury product. The weight and elasticity make it extremely performing and the alignment of the Technora fibres and Aramid tissue make it extremely resistant. The film is thin and it should be taken care of as a professional product. It is not in fact as hard wearing and carefree as thicker normal x-ply so one needs to be very careful not to drag it over concrete.
    I think someone should choose the Blade Pro when seeking the top of performance and technology. These are the principal characteristics we wanted to obtain when developing this sails: maximum performance.
    In the end the choice is not unlike choosing a mast. Using only 100% carbon or are you satisfied with 75%?
    For the majority of people the Blade is already perfect and offers a considerable performance but, for the true connoisseur and performance maniac the Blade Pro is truly special.


    How do you think the price difference will be received by buyers?
    Surely the larger prices of the Blade Pro significantly reduces the "catchment area". As we said it is an exclusive product produced in limited numbers.
    Blah blah blah marketing blurb...
    The S1 is a less costly sail with less battens and less panels which allowed us to offer it at a price that is accessible to the wider public to get hold of this technology.


    And if one happens to rip one of these panels in the Blade Pro?
    Do sail repair lofts have availability of this material or is it particularly difficult to repair?
    All considered the membrane is really resistant.
    The main loads run along the Technora yarns and we also used an Aramid x-ply to impede the rip run/expand. Up to now we have almost not had damages in a panel during tests and photo shoots. Two max I believe. The best way to fix these sails is simply to close the hole that normally requires a few minutes of work thanks to the rip stop system. Closing the hole is preferable to changing the whole panel, this way there are no changes in the profile. The performance is not altered.


    So one last question that we believe can shed light on some points and more technical aspects.
    We understand that each size comes with it's particular development meaning that each size has a specific lamination project where each particular panel is considered in the specific distribution of loads for that size and model.
    Doing this then all Technora and aramid fibres are expressly laminated inside the particular panels effectively following the load and stress lines that vary from sail to sail due to the diverse measurements of clew and downhaul, apart from the mentioned profile, in the same range. This aspect in our opinion truly separates these sails from others in the marketplace and
    they are very singular (unique) and customised...?
    Exactly, each particular measure comes individually laminated and all fibres in the panels come laid according to load lines of that specific model and dimensions.
    Also all reinforcements thus follow the same principle, varying in this manner the quantity of material used in a specific part of the sail according to the stress each sail is subjected to.
    Last edited by Navegante; 10th September 2014 at 08:19 AM.

  2. #51
    Senior Member Navegante's Avatar
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    Article

  3. #52
    Senior Member chrispavlo's Avatar
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  4. #53
    Senior Member Navegante's Avatar
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    Quote Originally Posted by Sailrepair View Post
    Attachment 10739 North Sails

  5. #54
    Super Moderator na-omi's Avatar
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    Nice swept-laid deck too

    thanks for the epic article translation, an heroic effort... Was thinking more of bullet points but that's much better and helps correct and fill in the gaps in what I was told about the sails the other day

    thanks too Terry T... Your account makes much more sense!

  6. #55
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    So the difference between this and the North Prisma 3dl from years ago is what exactly, is the sail now a single membrane with the fibres to one side only rather than sandwiched? Is it fully 3d molded?
    https://www.youtube.com/watch?v=jKwV6F3_Hl4

    If it is 3d molded then the main benefit would be that it takes human error out of the process, each sail would be damn near identical (bar the luff, batten pockets etc.) It always amazes me when you see brand new sails rigged on the manufacturers masts and booms at trade shows and there are wrinkles in the foot, luff in boom area etc. Ok when sailing as the mast bends etc the wrinkles will appear as the material is rigid - maybe we'll see more sails with dacron or stretch panels in, especially at the top end speed and race sails - a heap of diagonal ripples can not help the airflow.

    Could the battens not be bonded in the sandwich of the 2 skins of the sail eliminating the need for a batten pocket, would it still need tensioning or could the sail be loaded along the batten whilst bonding?

    Starboard and Severnve are great at utilising previous technology/ideas and rebranding it all, very Applesque of them. Spider Fibre, Hyper Spider? Thin Wide Boards (see the tiga hyper x as a good fore runner)

  7. #56
    Senior Member Navegante's Avatar
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    Quote Originally Posted by na-omi View Post
    Nice swept-laid deck too

    thanks for the epic article translation, an heroic effort... Was thinking more of bullet points but that's much better and helps correct and fill in the gaps in what I was told about the sails the other day

    thanks too Terry T... Your account makes much more sense!
    Thank you na-omi you're welcome.

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