An Overview of the AC75 These restraints have led to teams making asymmetric sets of foils so that within one pair they can explore two different design avenues.

Ac75 physics. 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. This video looks at how the new AC75 boat manages to fly above the water on foils at speeds of over 60mph powered only by the wind. Nowadays foils are commonplace but the engineering and sailing techniques needed to get the AC75 to fly are completely different from anything seen before.

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 will foil-tack and foil-gybe with only small manoeuvring losses and given the speed and the ease at which the boats can turn the classic pre-starts of the Americas Cup are set to. We explain how with collocation we only needed one simulation.

Hoisting the twin-skin mainsail on the AC75 requires the boat be stabilized while an intricate package of sails battens and top-secret internal control systems are fed aloft into the dual luff. McKinsey and QuantumBlack ran thousands of simulations to learn to sail the ETNZ AC75. The physics of the AC75 was accurately recreated using Gomboc the same simulator which is used to design the AC75 and train the ETNZ team.

To start with the AC75 is big 75-feet long and 16-feet wide but its also light which is crucial because the AC75 is designed to fly. The physics of a foiling AC75 are as simple as they are complex but envision a large windsurfing board with towering sails. The AC75 combines extremely high-performance sailing and great match racing with the safety of a boat that can right itself in the event of a capsize.

The boat type is a foiling monohull with canting ballasted T-wing hydrofoils mounted on port and starboard topside longitudinal drums a centerline T-wing rudder and no keel. In the AC75 Class Rule Sails are not a specifically defined term and so the common English usage of a sail is used. The ground-breaking concept is achieved through the use of twin canting T-foils ballasted to provide righting.

In between is the largest area of the sail which Fallow refers to as the Passive Zone. This is as close as you can get to sailing these amazing machines without getting wet. The top four metres is known as the Upper Zone and the bottom 15metres is the Lower Zone.