Sydney hobart 2013: utilizzo dei Code Zero

[matteo45]

pardon me
(from wikipedia):

Asymmetric spinnakers


Asymmetrical spinnaker resembling large jibs and flown from spinnaker poles are not a new idea and date back to at least the 19th Century. However in the 1980s a new concept appeared, starting with the Sydney Harbour 18ft Skiff fleet.

Since the 1960s many faster sailing craft, starting with catamaran classes, had discovered that it is faster to sail downwind on a series of broad reaches with efficient airflow across the sail rather than directly downwind with the sails stalled. This technique had developed to the extent that in bar conversation at the end of one season Andrew Buckland observed that the 18s had sailed all season without pulling the spinnaker pole back from the forestay and that all the systems could be simplified by eliminating the pole and setting the spinnaker from a fixed (but often retractable) bowsprit. The concept quickly evolved to a sail with a loose luff much more like a conventional spinnaker than the old jib style asymmetric sails. Julian Bethwaite was the first to rig and sail a boat with one the next season, followed shortly by Andrew Buckland. The first modern offshore sailboats to incorporate a retractable bow sprit and an asymmetric spinnaker were J/Boats [1]- specifically, the J/105. [2]. Today, J/Boats have built the world's largest fleets of asymmetric spinnaker sailboats- over 3,000 today.

The concept has spread rapidly through the sailing world. The tack of the sail may be attached at the bow like a genoa but is frequently mounted on a bowsprit, often a retracting one. If the spinnaker is mounted to a special bowsprit, it is often possible to fly the spinnaker and the jib at the same time; if not, then the spinnaker will be shadowed by the jib, and the jib should be furled when the spinnaker is in use.

The asymmetric has two sheets, very much like a jib, but is not attached to the forestay along the length of the luff, but only at the corners. Unlike a spinnaker, the asymmetric does not require a spinnaker pole, since it is fixed to the bow or bowsprit.[1] The asymmetric is very easy to gybe since it only requires releasing one sheet and pulling in the other one, passing the sail in front of the forestay. Asymmetrics are less suited to sailing directly downwind than spinnakers, and so instead the boat will often sail a zig-zag course downwind, gybing at the corners. An asymmetric spinnaker is particularly effective on fast planing dinghies as their speed generates an apparent wind on the bow allowing them to sail more directly downwind. It is also particularly useful in cruising yachts in the form of a cruising spinnaker or cruising chute, where the ease of handling is important. Various types of asymmetrics exist, and a common nomenclature classifies them by code from 0 to 6. Codes 1, 3, and 5 are reaching sails, and codes 2, 4, and 6 are running sails; the code 0 is a hybrid of genoa and spinnaker, designed to work like a genoa but classified under racing rules as a spinnaker.

Code 0 The code 0 asymmetric is a tight reaching sail, the most upwind capable of the asymmetrics. The luff is as straight as possible, and the sail is flatter than other spinnakers. Due to the flatness of the code 0, it is usually made with a wire luff for strength, and of a heavier, less stretchy fabric than normal for a spinnaker. Due to the tight luff and flat cut, the code 0 can be fitted for roller furling.

E' una questione principalmente lessicale, cioè indichiamo le stesse cose con parole diverse. Non uso il termine gennaker code 0 perchè mi pare, ma non ne sono sicuro, che il termine gennaker sia stato per un tempo un copyright della North.

Forse mi sbaglio, ma un genoa si infierisce sempre su uno strallo esistente, un code 0 no.
se diciamo code 0 e basta, allora tutti ' accordo IMHO

ciao