The concept being tested currently has a large D shaped section mast developed and built by Southern Spars with separate mainsails on either side of the mast providing a smooth transition from the mast to sail in its aerodynamic shape.

Ac75 mainsail control. Underwater is where things get really interesting this Americas Cup but the story starts inside the boat. AC75 Class Rule v110 Page 1 of 70 Page 3 of 71. As with everything on the AC75 the mainsail is a.

Paul Goodison as the mainsail trimmer controls the shape of the mast and the twin-skinned mainsail. Mainsails must perform over a wide variety of sailing conditions. Dean Barker the helmsman has control of the wheel and various things but his primary role is to steer the boat around the course.

OUT are the semi-rigid 23 metre wings that were used on the 50 ACC catamarans IN are the new double-skinned mainsails that are now raised and lowered 26m to the top of the mast. A double-sided mainsail where each of the two skins are attached to the back edges of the D-section. Hamburg January 4th 2020 AC75 INTERPRETATION 072 33 conflict with requirement to comply with the layout mandated in the rig plan so any control of the running backstays therefore is required to be consistent with this layout as well as the configuration.

Some differences between wings and the AC75 mainsail. This means is that the teams are able to manipulate their mainsail in a number of different ways to develop power and control where that. The mainsail can be adjusted to vary the amount and location of draft and trimmed to control the shape of the leech and its angle to the wind.

The AC75 class rules that control all the components of the sail plan have the same mixed approach as the rest of the boat. But you also have an upper-panel control. A new evolution this Americas Cup is the twin-skin mainsail.

There are supplied one-design parts and then theres wide latitude. In addition to conventional mainsail trimming controls this concept allows for twist and camber control at the head of the mainsail through a. 1 Introduction 11 This document defines the rules that govern an AC75 Class Yacht the class of yacht chosen.