The revelation came as the famous club backing.

Monohull ac75. The Americas Cup AC75 boat concept revealed. The AC75 class rule will be published by March 31st 2018. After becoming the first AC75 in the world to sail and foil in September 2019 DEFIANT sailed thousands of training miles in three widely separated venues while pouring valuable data into the teams ongoing design process for PATRIOT.

The AC75 mainsail will have a different flying shape from the IACC monohulls sailed from 1992-2007 Americas Cups class and the hard wingsails used on the AC72 and AC50 in 2013 and 2017. The first version of the New York YC Challenger AC75 focused on aerodynamics The result was a big soap worn to cross the limits of the rule in a shape that provided less resistance. The AC75 is the bold new high performance fully foiling monohull.

We are really proud to present the concept of the AC75 today. How all this scales up into an AC75 remains to be seen but for the doubters there would seem to be little doubt that the foiling monohull concept works the speeds impressive and should more than match the claims that the AC75 will be faster than the AC50. Instead of a keel it has two canting ballasted T-foils to provide righting moment and the ability to self-right the boat in the event of a capsize.

A monohull designed to fly engineered to reach speeds Road to the Americas Cup podcast episode 4. There is no doubt that the AC75 is a remarkable boat. When Emirates Team New Zealand won the last Americas Cup.

There is a sharp turn away from the direction of the AC50. We dont say how the skins have to come off the back of the D-Shaped mast. The leeward skin is more curved and therefore the leech is further forward.

The AC75 Class represents a return to the monohull but with a revolutionary new interpretation featuring pioneering technology that opens up a new approach to yacht design. So it was surprising when the first renders of the AC75 arrived to reveal a foiling monohull with no keel and two cantable foils either side of the hull. So farewell to the naval architects.