The second point the hull must have a function of an airplane wing at low speed and near the land.

Ac75 upwind. The Devlin Radio Show. You might have also observed how tight in the sails were trimmed in the downwind heading. The Americas Cup AC75 boat concept revealed.

The catamarans didnt seem to point that high. The first point the AC75 must fly as soon as the wind allows the start of the regatta. So farewell to the naval architects.

The two Challengers charged up the course at. The speeds of the AC75s are quite impressive especially. To my opinion I still had to make a hull shape which was still capable to create some righting moment for upwind and to still be a good all round boat good in the light good in transitions it is always the same story.

But the Kiwi boat goes upwind with a slightly higher VMG. It has been a phenomenal effort by Dan and the guys together with Luna Rossa design team and there is a lot of excitement building around the boat in the development and getting to this point. Upwind the AC75 will need to build speed by coming off its optimal VMG upwind course for some time and may have to sail a reaching course to some degree Eventually speed will build and from a rig point of view while reaching sheets will be eased a little and come back on as the boat pops up.

Given these formulas there was no other solution than to come up with about 19 degrees of apparent wind heading downwind and 16 degrees apparent wind heading upwind. Reaching speeds of 20 knots velocity made good VMG upwind the AC75 marks the evolution of sailing over the last 20 years. Peter Burling blown away by the upwind speed of the AC75s.

The fifth yacht planned from the American Stars Stripes challenge has not yet been built and already the challengers and the defender are working on their second yacht which should be launched next summer for the first ones. Luna Rossa earned the first cross but the race soon turned in favor of American Magic. Now the AC75 has passed its first test as a class in the opening and only Americas Cup World Series regatta which concluded less that two weeks ago some of the top sailors in the new class share their views on the foiling monohull.