PDA

View Full Version : ETNZ Unveils AC72



PD Staff
05-30-2012, 11:03 PM
http://www.youtube.com/watch?v=hMRPFYw4XTY


http://pressure-drop.us/imagehost/images/64010099633549660420.jpg
Image © Richard Gladwell

Richard Gladwell of Sail-World.com tour the ENTZ base and Cookson's boat yard where ENTZ's 72' is nearing completion.


"Inside the Cookson shed the AC72 awaits with her two hulls on the floor ready for the main beam to be attached.

It’s an odd feeling. Somehow we expected the catamaran to be bigger, but maybe the slimness of the hulls are deceiving.

Next it’s a quick take on the beam of the boat – which can only be imagined - with one hull positioned on one side of the shed area, and the other opposite.

There’s a couple of plywood platforms in between the hulls, ready to support the mainbeam while the boat is preassembled. Mentally we place a large piece of curved carbon between the two support platforms and another mind picture begins to emerge.

The cockpits in each hull where the grinders and crew will work are a little unusual. Well, they’re different from what they had on Alinghi 5, and different from the AC45 (on which they are non-existent).

Downstairs at Cooksons, we are shown the mainbeam sitting on a small truck waiting to be taken to the level above. It is an interesting piece of kit. Not the standard beam that we have been used to seeing on the AC45’s, and again it’s different from the Alinghi 5 approach.

Trying to mentally construct the AC72, from being shown a series of components spread across two locations, is not an easy task. All will be revealed when the AC72 is launched around 21st July in an evening ceremony, open to the public – and should be very spectacular.

Then it’s back upstairs to the bows of the AC72 where the interviews take place with two TV crews working over Dalton and design co-ordinator, Nick Holroyd. Builder Mick Cookson is also interrogated on camera. Then it’s our turn.

Grant Dalton: 'Expect 40kts'

Grant Dalton rattles off some statistics about the time to involved in the whole process – essentially it is about three times longer to build the AC72 than for an America’s Cup monohull. He gets that by adding the 25,000 hours of wingsail build time to the 40,000 hours platform build time – 65,000 man hours. Plus about 50,000 design hours – an exercise which has been underway since October 2010.

Launch date is provisionally set down for July 21, and construction of the second boat will start soon after that.

This boat will be fully fitted at Cooksons, disassembled and taken to the Viaduct for final assembly.

Dalton opens the interview by saying says their AC72 will not be dissimilar in appearance to the AC 45 - aside from the scale of the boat.

With 55tonnes of righting moment – which translates directly to power – the AC72 is a lot of boat to handle. She will race just 11 crew, when 20 would be more appropriate.

Racing in the America’s Cup in San Francisco will all be about efficiency, he says - given the AC72 is so under crewed.

Turning to the speeds of the AC72, Dalton says they are expecting to see 40kts in 20 knots of breeze downwind, and mentions 18kts upwind.

The glory days of the America’s Cup, with two boats hitting into the breeze, bows prancing, as one tries to get ascendency over the other, are gone in the short course, fast boat, America’s Cup."


http://www.sail-world.com/USA/Gladwells-Line:-Americas-Cup---Emirates-Team-NZ-AC72-unveiled-+Video/97836