Throughout the race the teams will constantly adapt their sail plan up and down the apparent wind range.

Ac75 wind range. The AC75 class being used in the 36th Americas Cup introduced the first foiling monohull design to the event. Tides in Auckland range up to 33metres 10ft 10 each month. Throughout the race the teams will constantly adapt their sail plan up and down the apparent wind range.

Depending on the course of the day there are many vantage points around. The wind limits will not be increased for the Prada Cup final or the Americas Cup match. Yesterday AC75 race was painful to watch although the AC75 concept did work and look like weapons main issue as noted first day was light wind perf range.

207m plus 2m bowsprit. Mainsailsoft wing 145m2 - jib 80m2 - code zero 180m2. Certainly the foiling monohull is very slow sailing in displacement mode.

When entering a tack should one turn away from the wind to build speed but have to turn through a bigger angle. In mere seconds the AC75 goes from low-speed displacement sailing in as little as 10 knots apparent wind speed to high-speed foiling in excess of 50 knots apparent wind speed. As with all foiling boats getting on the foils and staying there in the wind range set for the event is key to winning.

The lower end of the wind range is expected to be set at 6-7kts - whatever the minimum is for foiling in the AC75. This could range from simple feedback control to a controller with some memory and sight of the future. No one can closest thing is the 69F which has a similar behaviour in light winds and its also achieving some good final speed in the 30 knots range.

The Americas Cup Race village is FREE to enter and a great place to enjoy the action from or soak up the village atmosphere. New Zealands Hauraki Gulf sees a large wind range often blustery conditions and there are also waves to contend with. The AC75 design rule is a so-called box rule which sets some key parameters such as hull length and overall length with bowsprit 75ft.