On most boats it is important to have the head of the mainsail as close to the top of the mast as possible. Furthermore it must also be quick to attach and disconnect the main halyard, even with cold and wet fingers. So a shackle or a bowline are not the best solutions. The best is the method is the one shown in this video. The bobble is nice, but not strictly necessary. A double figure of 8 knot (figure of 16?) will do. The bobble or knot is never removed so you cannot lose the halyard through the mast. I usually shorten the main halyard a few cm/in at the start of each season to move the wear spots.

0

0

0

1,044

0

0

0

0

552

0

0

0

0

450

SUBSCRIBE ➡️ http://bit.ly/wsnsubscribe Dylan Fletcher & Stuart Bithell (GBR) sailed the shortest distance in the Medal Race, which they won to claim gold. Find out more facts and figures from the 19-boat 49er fleet at #Tokyo2020. Follow World Sailing 🌍⛵️ on: Facebook ➡️ www.facebook.com/worldsailingofficial Instagram ➡️ www.instagram.com/worldsailingofficial Twitter ➡️ www.twitter.com/worldsailing Website ➡️ www.sailing.org Newsletter ➡️ bit.ly/wsezine

0

0

0

1,735

March 14th...giornata della matematica, Pi Greco day. Perchè non utilizzare le cifre di π per costruire una spirale, la spirale di Archimede, da appendere in classe o nel corridoio? Se appesa sopra un termosifone o un'altra fonte di calore, diventa una divertente attività ed esperimento con cui scoprire alcune caratteristiche dell'aria: la spirale ruota e si muove perchè spostata dall'aria calda. L’aria calda è più leggera dell’aria fredda perché meno densa e sale verso l’alto. https://maestramonica.it/pi-greco-day-la-spirale-di-archimede-matematica/

0

0

0

2,347

UK Sailmakers Uni-Titanium jib on one of the Turkish Navy's MAT 1180s.

0

0

0

946