America's Cup: Gino Morrelli outlines the new AC62 design

Emirates TNZ lifts onto their foils as Oracle takes a short nose dive before the first mark. - America’s Cup
Kimball Livingston of the Blue Planet Times talks with Gino Morrelli of top US multihull design partnership, Morrelli and Melvin, who have had a big hand in the design process for the draft design of the AC62, expected to be used for the next America's Cup.

The next generation will look much like this 2013 generation challenger from New Zealand, but they’re a new breed he says.

Gino Morrelli believes the next generation of America’s Cup catamarans will revolutionize upwind tactics. He foresees the boats foiling through tacks without slowing down, and if there is no price for tacking, that’s a new calculus, isn’t it?

A new game.

Smaller, faster, safer. It’s quite a package that Morrelli is talking about, and he knows a bit. His firm of Morrelli & Melvin wrote the design rule for what we will call, for now, the AC62. That is, ten feet shorter than the AC72s of 2013 and shrunk appropriately in other dimensions as well. Add-in some one-design components, factor-in the fact that a lot of the design possibilities have already been explored—we know what the next generation will look like—and you have a boat that is cheaper to design and cheaper to build, even with amped-up technology. His partner Pete Melvin has been hard on the case.

Oracle Team USA Race 17

At which point Morrelli adds the ultimate qualifier, 'We can lower the cost to entry, but we can’t make it cheaper to win the America’s Cup.'

Write this on the board twenty-five times: An America’s Cup team will always spend whatever it can get.

I shared billing with Gino over the weekend for a program at Strictly Sail Pacific, which opened my window onto what’s coming next, with a little caution tape on the windowsill: 'We finished our job about four weeks ago,' Morrelli told the audience. 'In our last iteration, the boat was 62 feet, but now we’ve handed it over to Oracle and Russell and the boys to fuss it out with the Challenger of Record and Iain Murray. That is, the Aussies from Hamilton Island Yacht Club. Between them, a lot can happen. We’re now out of the loop, but something’s cooking . . . At some point they have to pull the trigger and publish the design rule and let people start working on the new boats, even if they don’t decide the venue until deep in the process.'

How can you design the boat if you don’t know the venue? Or if, as Larry Ellison once suggested, there could be more than one venue? Good question. Here we go—

34th America’s Cup final Emirates Team New Zealand Race 16

Gino again: 'One thing that was possible under the AC72 rule, but now is mandated, is a wing design that can be over-rotated to a negative angle of attack. You would do this at the top of the wing, so that instead of pushing the boat over, it’s actually pulling the boat up. Theoretically, if you’re bearing away around the weather mark in 30 knots, you can crank the wing inside out to get positive righting moment. You get a safer turn. The downside is that you’re inducing drag, which slows you down, so you’re going to have to learn how to actually do this. But it’s one way to build a big rig that will perform in San Diego but survive San Francisco.

Blue Planet Times has the full story click here to read
http://www.sail-world.com/121087