Submitted on November 21, 2005 by Iain Finden

Question: I would like to know what Dacron sailcloth weight you would recommend for a big mainsail like a Nonsuch 33. It is a low aspect ratio sail, does that mean it should be a balanced weave (same density of warp and fill yarns)?

Finally, for good windward performance and sail shape retention, would you recommend longer flexible battens?

I look forward to your kind reply.

I believe I have the only Nonsuch 33 in the UK, and she deserves looking after.

Kindest regards,
Iain Finden

Answer: Dear Iain,

Thank you for your email regarding a mainsail for your Nonsuch 33.

The most suitable fabric to build your new mainsail from would be North Sails Premium low aspect dacron. This fabric has been specially manufactured to provide a balanced construction suitable for rigs with aspect ratios of 2.5:1 or less, your rig has an aspect ratio of under 2:1. We would use fabric weight 8.5L, this fabric is 8.9oz smsy with a warp x fill count of 300 x 570.

I would also recommend longer tapered battens than your current sail to help give more support to the leech and improve sail shape retention .

Please feel free to give me a call if you have any questions.

Kind regards,
Jeremy Smart
North Sails, UK
+44 (0)239 260 4266

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