There is also additional aerodynamic friction drag due to the increased total air-wetted surface.

Ac75 aerodynamics. The core of the AC75s sail plan is the rotating soft-wing sail comprised of two sailsor skinsof a double-sided mainsail that must be attached to each of the two aft edges of a D. The AC75 class rule splits the mainsail into three zones. The animation shows the behavior of our aeroelastic simulation algorithm CFD FEM as it converges to an equilibrium sail geometry and aerodynamic flow solution for the new AC75 mast.

The AC75 Americas Cup 75 is a racing yacht used in the 2021 Americas Cup match and planned to be used for the 37th Americas Cup and 38th Americas Cup matches. Kneeling is a less powerful grinding position but it kept us out of the wind improving aerodynamics. November 30 2017.

The AC75 is expected to reach high speeds on the Waitemata Harbour. In fact we speak of flight not navigation. 75 feet 2286m.

The ground-breaking concept is achieved through the use of twin canting T-foils ballasted to provide righting. Weve been searching for the perfect balance between hydrodynamic and aerodynamic performance. When some observers realized that the next Cup monohulls would fly they thought that only the foils would be decisive.

So farewell to the naval architects. Like the foiling catamarans of the two previous Americas Cup regattas the AC75 boats are designed to be lifted out of the water by their massive double-skinned wingsails and kept stable above it. With the AC75 we have entered another dimension where aerodynamics are more important than hydrodynamics.

AC75 class boats are powered by both human energy and battery power. An AC75 that was optimised purely to accelerate and take-off would look very different to one which was optimised for steady-flight and thats reflected in the huge variation we see between our Competitors yachts in the fleet. The AC75 yachts are single-hull boats without a keel which can fly on two lateral T-foils and are believed to have a similar speed potential as.