North 3Di

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Faff said..
Avanti, Severne, Duotone and now Neil Pryde all have membrane sails. How is North different?

Completely different material in North Sails, compared to everything else.

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Faff said..
Avanti, Severne, Duotone and now Neil Pryde all have membrane sails. How is North different?

Membrane sails are in a way completely different from North 3Di sails.
Membrane sails are made as a flat sheet, they lay the fibres for each section, tack area, mid areas and head area, then where the batten pockets are, they Join those pieces together, they are light but only have shape where the two panels meet, in some ways have less shape than a conventional panel sail as panelled sails also have vertical shape too, but as they only really have more fibres in the higher stress area, then they are usually lighter.

3di sails from North are built on a mould, the fibres are laid from tack to head and clew to head etc so the fibres are full length of sail and then more fibres are laid in higher stress areas, the batten pockets and made between the layers so they too are sandwiched and theres no stitching. So the shape is put into the sail with moulding it onto a shaped surface where as the membrane is still shaped under the battens and sewn ( or glued in a lot of yacht sails).




That is a membrane sail on a plotting table.

Hope that helps.