America's Cup: British challenge 'Britannia' hailed as innovative by skipper Ben Ainslie

British challenger Sir Ben Ainslie is hailing the radical innovative design of his America's Cup race boat, 'Britannia'. 

INEOS Team UK have launched the second generation AC75 onto the Waitemata Harbour on Saturday morning, a day after American Magic unveiled their race boat.

The British team are backing the boat to bring home the Cup for the very first time. 

The radical new design is on display for all to see, with the new boat featuring a massive bustle keel, an element absent from their first boat.

"We have a lot more information about where the racecourse is and what the wind limits are," says chief designer Nick Holroyd. "We've been able to make a much more focused boat, with a stronger focus on the aerodynamics."

And they believe they hold an edge over the newly revealed Americans.

"It's a nice-looking boat, but probably less extreme than ours in an aerodynamic sense," says Holroyd.

The aerodynamics are so finely tuned that success can quickly turn to catastrophe, as American Magic experienced on Friday when it almost capsized.  

Team Ineos will want to avoid that scenario, but only time on the water will tell. The crew of 11 are set to put the boat through its paces early next week.

"The main focus is developing it, learning how to sail it and reliability," says Ainslie. "We can't afford any breakdowns.  

"There's a huge amount of work to do."

With just two months to go before they line up against their opposition at a Christmas regatta, every split-second counts, as they aim to increase boat speed by at least 10 percent come December.

And they'll need to be that quick to beat Team New Zealand on home waters and claim the 'Auld Mug' for the first time. 

"More than 30 years of experience in the Cup... it's pretty hard to beat that, but we think we can and we're going to give it a damn good shot," says Ainslie.