Ever wondered about cutting and reshaping your jibs? In this video we show how we do exactly that with 2 of our tri radial laminate jibs!
We were lucky that NV came with 4 laminate jibs as well as a newer smaller Dacron staysail to go on our babystay.
All our laminate jibs were originally designed to be hoisted on a racing tuff luff - which a plastic profile, which fits on top of the forestay and the sails slot into it the same way as they do for furlers - only it doesn’t allow for the sails to be furled and instead they must be hosted up and down after each use.
Since we now have a Furler on the front forestay, these jibs are now all too long for this stay as well as our new middle stay, which we added as part of our refit. We wanted this extra stay in order to obtain a wider range of sail configurations and make it easier to manage double handed.
We therefore needed to reduce 2 of our jibs; one to fit on the front forestay with the furler and the other to go on the new middle stay which we installed the tuff luff on.
In a previous video we’ve already talked about the sail we’ve chosen to fit on the middle stay (watch this video here • Shall we CUT our RACIN... ), so our first job now was to pick the one to go on the front forestay.
As we discussed in this previous video tri radial sails like our laminate jibs are made from triangular panels which radiate out from the three corners of the sail since these are the points the loads are transmitted from. Therefore careful planning is needed before making alterations to these types of sails, as any cut will alter the shape of the panels and result in them no longer meeting at these 3 corners.
Our jibs were designed to be used with battens, and so the leech has a positive roach, which means the leech curves over the straight diagonal of the triangle.
For the sail we’re going to put on the Furler at the front, we won’t be able to use battens anymore, and without battens, this top curved part of the sail would flap. Therefore part of our alterations for cutting this sail involved cutting the entire leech in order to change it from having a positive roach to a negative roach - in other words, changing the curve from positive to negative - or below the diagonal of the triangle. For anyone that’s interested in seeing how to calculate this curve, we’ve explained it in more detail on our Patreon website ****
We decided that our best option was to cut the head as this would disturb the panels the least and to make the cut a diagonal ending at the first batten pocked which we can use as reinforced areas to transmit the loads through.
Since we’d cut the head of the sail, we re-inforced this area by stitching the top triangle which we’d cut out at the top, on to the top of where the new head of the sail was. This helps give the sail back the right structure, by helping the forces felt by the sail to continue out to the head of the sail.
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Caio! We are Timo and Jo, an Italian and English couple with countless ocean miles under our belts. We're refitting an ex Vendée Globe Open 60 race boat originally designed & built & raced by famous Hungarian sailor Nándor Fa. He competed in her in the 1992 Vendée Globe (round the world single handed race known as “the Everest of the seas”), finishing 5th, becoming the first non-frenchman to finish.
We are currently in Fiji giving this old gladiator a new lease on life, transforming her from an ex race boat to a performance family cruiser, which we'll need to make both dog and baby proof! We’re planning to set sail again in Oct 2022, so with limited time&money we have plenty of challenges ahead to turn our dreams into reality&get back on the water!
Subscribe to our channel&track our progress as we release videos about our journey as well as "how to" videos about anything boat related.
Never stop to dream, never stop to sail!
You can find out more about the boat, us and our refit plans on our website www.sailingnv.com or follow us on
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1 окт 2024
