With the clock ticking down to the start of the Louis Vuitton 38th America’s Cup in Naples in 2027, the AC75 Class Rules and Technical Regulations have been issued to all teams and published with a focus on cost containment.
The decision has been taken to race in Naples with hulls from the Louis Vuitton 37th America's Cup (or modified from the 2021, AC36 versions). In addition, a strict criteria has been implemented with regards to componentry whilst radically changing the internal structure of the yachts by eliminating cyclors in favour of stored energy. What was recognised in detailed analysis was that the hulls themselves represented only minimal advantages, barely recognisable in practice. Furthermore, active cost containment measures in terms of overall team budgets has been laid out in the AC38 Protocol.
Arguably the headline change is that at least one female athlete is required to be in the five-strong sailing team, and the addition of a fifth active crew-member means greater emphasis on race strategy, positional sailing on the racecourse and bigger picture discussions amongst the teams. The move aligns and brings closer the Women’s America’s Cup Teams of each syndicate as rotation is inevitable, and a deep pool of talent will be required for the length of the campaign from now to Naples in 2027.
Furthermore, the introduction of a ‘Guest Racer’ position on the AC75s whilst racing is a re-kindling of a programme not seen since Valencia in 2007, opening up the pinnacle event in world sailing, the America’s Cup, to the widest audience.
Key points of the new Class Rules and Technical Regulations:
AC75 CLASS RULES
- Each AC75 will have five dedicated crew members with at least one female sailor required to be onboard as part of the crew.
- A ‘Guest Racer’ cockpit will be implemented, allowing for a non-team member to sail onboard an AC75 during racing – truly the most coveted seat in sailing and a first since the ‘18th person’ guest place used last in the 2007 America’s Cup on the IACC Version 5 boats in Valencia.
- Joint Recon is back with self-declared Observation Days for each competitor. One Design AC40 training is not expected to be covered, but once the AC75s can return to the water from January 15th 2026, the recon programme will be in full swing.
- eChase boats powered by batteries, hydrogen or biofuels to be used by all teams, with a minimum length overall of 10m, a minimum top speed of 35 knots and a range capability of 75 nautical miles.
- The specification of a one‐design battery unit that will, when combined, form the primary battery bank that will control all moveable parts on the AC75 will be published in due course.
TECHNICAL REGULATIONS
- Legacy hulls can be derived from either AC37 or AC36 with more tolerance for the adaptation of AC36 hulls from 2021.
- Three legacy foil wings from AC37 can be adapted by up to 20% within tight parameters, and teams are allowed to build a total of three new foil wings, again within set parameters.
- Three legacy foil flaps again can be adapted by 20% and the teams can build a total of five new foil flaps for AC38.
- The one-design foil arm stocks that have remained unchanged since the genesis of the AC75 Class will be re-used in AC38.
- No new masts allowed for the teams that built two masts in AC37. Only one team, Orient Express Racing, built just one mast, so they would be allowed to build another within tight parameters and to a similar design for Naples 2027.
- A total of four legacy mainsails and six new mainsails are permitted; each of these can be re-cut an unlimited number of times as long as 85% of the original remains.
- 13 new jib skins are permitted, plus 10 legacy jibs, making a total of 23 overall for the teams – with the same re-cut permissions as the mainsail.
- Only 1 new rudder permitted.
- Minor modifications allowed to hull form – with just 4 square metres of change allowed to the hull structure (not shape) – to allow for changes to internal systems.
- Changes to control systems, hydraulics and electronics are unrestricted, providing they can be fitted into the existing hull forms.
READ THE TECHNICAL REGULATIONS