When Luna Rossa heels its bottom is close to horizontal but its keel must induce some distortions in the water lines.

Ac75 no keel. In this regard they are very like a 75ft skiff than a 75ft keelboat. The deck is slightly recessed to gain sail area favor the wind acceleration in the lower part of the sails and increase the. Most notably the AC75 lacks a keel.

The keelthinstarts under the bowsprit and dips almost straight down to the arms of the foils. Here it is. GRANT DALTON CEO Emirates Team New Zealand We are really proud to present the concept of the AC75 today.

The AC75 has a mainsail that actually consists of two sails set on the back of a D-Shaped. INEOS Teams Britannia II exhibits the most conspicuous one thick square-cut. Burns Fallow raises an important issue inherent in the AC75 design concept with its reduced stability at low speeds - when there is no or little lift being generated by the leeward foil.

The AC75 crews might be sailing in only 18 knots of breeze. Think about it. 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.

The single most radical development of the AC75 is to take a 75ft keelboat but put no keel on it whatsoever. A 23-metre-long yacht with a 27 metre mast and no keel. There is no heavy keel to help keep it upright like a traditional sailboat.

Then it climbs beneath the hull at the last part. The physics of a foiling AC75 are as simple as they are complex but envision a large windsurfing board with towering sails. The 75-foot racing machine will use twin foils for speed and maneuverability.