sail-world.com
 
 
News Home Video Gallery Photo Gallery
Sail-World.com : AC45 Designs - Lines and sail plans - first time published on the web
AC45 Designs - Lines and sail plans - first time published on the web

'©François Chevalier - Lines & Sail plans of the AC45 with its two wing versions - AC45 designs - AC45 lines and sail plans'    Jacques TAGLANG    Click Here to view large photo

French designer, François Chevalier has kindly provided a set of lines planes for the AC45 - the first time these have been published. Also included are the two sail plans for the stock wingsail and with the five metre extension.

He writes: When we drew these plans we were able to see moulds of the hulls that everybody could access on the official website. So we were able to draw the lines plan with relatively good accuracy. As soon as the boat got her beams, we were able to finalize the deck plan.

The development of the AC45 lines plan, computer designed should answer to multiple purposes in order to be able to maneuver leeward with the windward hull well above water. The bow should be as narrow as possible without to run into the first wave and to give crew and wing a toss! Thus the half forward part of the hull needed significant reserve buoyancy.

Indeed, in contrast to the C Class catamaran, the AC45 owns a generous headsail wardrobe. To reduce frictional surface with the water, the shape of the bottom should be as round as possible without being too deep. In the same way, the top of the hull should allow the best water flow that would over-helm the bow. From the central beam, the hull forms are slightly flatter in order to facilitate surfing but also sufficiently round for reducing the wetted surface.

In view of the he power of the wing, as soon as its incidence is trim with a maximum lift, the aft volumes are never sufficient to prevent the boat cambering. In the opposite, there are never enough forward volumes to avoid diving during collision with a wave at full acceleration.

For maintenance and reliability reasons, the wing of an AC45 has a deliberately simplistic conception. It has only two mobile profiles while 24 years ago the catamaran Stars & Stripes had a wing fitted with a trailing edge steerable on the profile support. The crews have enjoyed to the practical implementation of this first step aboard these new generation racers. It will be quite different aboard the AC72. Here, the conception of the wing elements is free but inside a fairly strict perimeter. We will talk about later.

To conclude, it should not be difficult to design a faster catamaran than the AC45. However it was not the goal, and despite the above, it is a fantastic toy!

Comparision USA-17, AC72, AC45 and SL33 -  Jacques TAGLANG  


AC 45 data:

Designers: Oracle Design Team & Mike Drummond
Builder: Core Builders (NZ), Cookson Boats (NZ)
Launching date: January 17th, 2011
Type: Wingsail catamaran
LOA: 44.13’
LWL: 44.13’
Beam: 22.6’
Draft:
Displacement: 1.400 kg
Mast height: 70.5’
Sail Area – wing + reacher: 1430 sq. ft. (up wind)
Sail Area – wing + gennaker: 2,259 sq. ft. (down wind)

For more on these projects see: www.chevaliertaglang.blogspot.com/


by Jacques Taglang

  

Click on the FB Like link to post this story to your FB wall

http://www.sail-world.com/index.cfm?nid=96071

8:33 AM Sat 14 Apr 2012GMT


Click here for printer friendly version
Click here to send us feedback or comments about this story.

Click for further information on
2011-12 America's Cup World Series

Related News Stories:

14 Apr 2012  Fisher's View: America's Cup - Racing cancelled on Day 4
14 Apr 2012  AC World Series Naples - Racing abandoned for first time ever
14 Apr 2012  Fisher's View: America's Cup - Extensions left on shore + Replay Video
14 Apr 2012  AC World Series - Day 3 a Black Friday in Naples for Emirates Team NZ
14 Apr 2012  AC World Series Naples - Day 3 for Oracle Racing Spithill + Video
14 Apr 2012  AC World Series Naples - Artemis Racing move on to semi-finals
14 Apr 2012  AC World Series Naples - Energy Team celebrate first race win
14 Apr 2012  America's Cup World Series Naples - Tricky conditions
13 Apr 2012  Fisher's View: Barker is twice victorious on America's Cup WS + Video
13 Apr 2012  AC World Series Naples - Oracle Racing Bundock into semifinals + Video
MORE STORIES ...






News - USA and the World





































America's Cup Book Review: Winging It - Oracle Team USA's comeback *Feature by Richard Gladwell Sail-World.com/nz,




Rolex China Sea Race 2014 - nip and tuck for IRC honours by RHKYC and Guy Nowell, Sail-World Asia, Hong Kong


























HUD Vision: An interview with Afterguard Marine’s Alex Moret *Feature
ISAF Sailing World Cup Hyeres - US Sailing Team ready for action
Volvo Ocean Race - Dongfeng Race Team first official qualifier
Springtime boat buyers need to take care of a few key things
ISAF Match Race Rankings for 16 April 2014
ISAF Sailing World Cup Hyeres – World’s best to race on French Riviera
Rolex China Sea Race – Fleet off to a clean start
America's Cup: Expected de Ridder penalty should be reduced *Feature
World Youth Sailing Week – Second edition officially presented + Video
Rolex China Sea Race - Sailing classic returns
Les Voiles de St Barth – Fired up for battle
CNN Mainsail Down Under for the 75th JJ Giltinan Trophy - 18ft skiffs
Volvo Ocean Race: North Sails on outfitting the Volvo 65
Image gallery: James Cook High's Royal encounter on Steinlager 2 *Feature
Volvo Ocean Race - Maersk Line named shipping partner
Congressional Cup - Victory for Taylor Canfield and crew
SSV Oliver Hazard Perry joins America's Tall Ship fleet + Video
2014 Halifax – Saint-Pierre Ocean Race
Oyster Regatta Antigua - Glorious conditions prevail on final day
WWA Pro Card Qualifier - Pro Cards earned at Freedom Wake Park
Christmas Caribbean Rally - Top class sailors to compete   
Earth Day boater tips   
Anna Tunnicliffe - from CrossFit to Extreme 40's   
Charleston Race Week - Photos by Chris Howell   
Image Gallery: Stratis SL33 flies on the Waitemata   
Audi Melges 20- Sperry Topsider Charleston Race Week - Light final day   
Clipper Round the World Yacht Race - PSP Logistics prepares for USA   
ISAF Sailing World Cup Hyères - Crème of the crop to compete   
Congressional Cup: Luna Rossa makes podium in first event   
Int 14 World Championships 2015 launch new event website   
International Optimist Regatta Clinic and Team Race - Register now!   
Congressional Cup: World top rankers finish that way in Long Beach   
Sperry Top-Sider Charleston Race Week Day 3 finale   
America's Cup: Gino Morrelli outlines the new AC62 design   
Doyle Sails New Zealand signs Andrew Brown as One Design Manager   
America's Cup: Dean Barker's Blog - A sail with the Duke and Duchess *Feature   
29er World Youth Sailing Week Easter regatta - Day 1 and 2 overall   
C Thomas Clagett Jr Memorial Clinic/Regatta - Entries start to roll in   
50th Congressional Cup: See the delayed coverage and media conferences   
Clipper Race 10 Day 27: Closing stages - Qingdao to San Francisco   


For this week's complete news stories select    Last 7 Days
   Search All News
For last month's complete news stories select    Last 30 Days
   Archive News







Sail-World.com  


















Switch Default Region to:

Social Media

Asia

Australia

Canada

Europe

New Zealand

United Kingdom


http://www.sail-world.com/event_images/image/Twitter_logo_small.png http://www.sail-world.com/event_images/image/FaceBook-icon.png  http://www.sail-world.com/event_images/image/RSS-Icon.png

United States

Cruising Northern

Cruising Southern

MarineBusiness World

PowerBoat World

FishingBoating World

 

Contact

Commercial

News

Search

Contact Us

Advertisers Information

Submit news/events

Search Stories/Text

Feedback

Advertisers Directory

Newsletter Archive

Photo Gallery

 

Banner Advertising Details

Newsletter Subscribe

Video Gallery

Policies

 

 

 

Privacy Policy

 

 


Cookie Policy

 

 



This site and its contents are © Copyright TetraMedia and/or the original author, photographer etc. All Rights Reserved.  Photographs are copyright by law.  If you wish to use or buy a photograph contact the photographer directly.
X6XL NEW US