ETNZ beat their self-imposed deadline for revealing a description of the AC75 monohull for the 36th America's Cup in Auckland in 2021. The 75 foot boats will have no keel but two canting ballasted foils weighing 1 to 1.5 ton each. Battery powered hydraulic pumps are likely to drive the rams that will raise and lower these appendages. Grant Dalton has said that stored energy will be needed but that no internal combustion engine will be on board.

Class rule details to be defined. The crew will probably be 12. In September, Grant Dalton stated that they had not eliminated cyclors, but in an interview in November he changed that, saying that only arm grinding pedestals would be allowed.

ETNZ says that AC75 will foil-tack and foil-gybe with only small manoeuvring losses.

The boats will have twin canting T-foils, ballasted to provide righting-moment when sailing, and roll stability at low speed. The boats will not have either a fixed or canting fin keel like most current monohulls. The ballasted foils will weigh between one and one-and-a-half tons according to Dan Bernasconi. We can probably think of them as like two canting keels. They will require powerful hydraulic rams powered by electric pumps.

From the ETNZ announcement, 20 November: "Whilst recent America's Cup multihulls have benefitted from the power and control of rigid wing sails, there has been no transfer of this technology to the rigs of other sailing classes. Emirates Team New Zealand and Luna Rossa are investigating a number of possible innovations for the AC75's rig, with the requirement that the rig need not be craned in and out each day. This research work is ongoing as different concepts are evaluated, and details will be released with the AC75 Class Rule  before March 31^st, 2018."

A code 0 headsail will be used in light air. 

ETNZ CEO Grant Dalton: “We are really proud to present the concept of the AC75 today. It has been a phenomenal effort by Dan and the guys together with Luna Rossa design team and there is a lot of excitement building around the boat in the development and getting to this point.”

“Our analysis of the performance of the foiling monohulls tells us that once the boat is up and foiling, the boat has the potential to be faster than an AC50 both upwind and downwind.”

ETNZ Design Head Dan Bernasconi:  “This design process has been new territory for the team, starting with a clean sheet to develop a class - and we've loved it. We wanted to see how far we could push the performance of monohull yachts to create a foiling boat that would be challenging to sail and thrilling to match race. We're really excited about the concept and can't wait to see it on the water..

We think we have achieved these goals - thanks also to the constructive co-operation of Luna Rossa design team - as well as the more practical detail to consider in terms of cost management and logistics of running the boats.”

Luna Rossa boss Patrizio Bertelli: “The choice of a monohull was a fundamental condition for us to be involved again in the America’s Cup. This is not a return to the past, but rather a step towards the future: the concept of the new AC 75 Class, which Emirates Team New Zealand and Luna Rossa design teams have developed together, will open new horizons for racing yachts, which, in the future, may also extend to cruising. It is a modern concept, at the high end of technology and challenging from a sporting point of view, which will deliver competitive and exciting match racing. I would like to thank both design teams for their commitment in achieving, in just four months, the goal which we had established when we challenged”.

Luna Rossa skipper Max Sirena: “As a sailor I am very pleased of the concept jointly developed by both design teams: the AC 75 will be an extremely high-performance yacht, challenging to sail, who will require an athletic and very talented crew. Every crew member will have a key role both in the manoeuvres and in racing the boat; the tight crossings and the circling in the pre-starts – which are part of the America’s Cup tradition – will be back on show, but at significant higher speeds. It is a new concept, and I am sure that its development will bring interesting surprises”.

Team Principal and Skipper, Ben Ainslie welcomed the announcement, "The Defender, Emirates Team New Zealand and the Challenger of Record, Luna Rossa have delivered a truly high-performance boat that will make the next America's Cup an incredible sporting and technical challenge.

"We look forward to the opportunity to consult with the Defender and Challenger of Record ahead of the final class rule being announced at the end of March. We can't wait to start tackling the design and engineering challenges in this new class.

"What we do know is that we're going to be foiling again, and that in the right conditions, this boat will be as quick as or quicker than the ACC foiling catamarans raced in the last Cup. The sport has gained a lot of new fans and this boat, delivered with a global circuit and high-quality free-to-air broadcast TV will cement their interest in the America's Cup and build on a very strong base."

Land Rover BAR's new CEO, Grant Simmer, was in Portsmouth for the announcement and commented, "This new class is a real challenge for our design and sailing team. It's also a great opportunity. A new class of boat means a blank sheet of paper, and while we can use much of what was learned in AC35 about systems, foils and the associated design and engineering, there's also a great opportunity to take a jump ahead if we get the conceptual approach right from the start. This is a very exciting time for the team."

As of 25 November, no response from BMQR/NYYC.

In September, before the release of the Protocol or the concept video for the AC75, Scuttlebutt surveyed their readers and found that 82% preferred a monohull for the America's Cup. Once the concept video was released on 20 November, the Scuttlebutt readers seemed a bit less pleased.

Fans on the Cup Experience Facebook group seem excited by the new concept. As of 25 November, over 85% of the members who prefer monohulls like this concept. Many of the multihull fans also like this concept.