sail-world.com
 
 
News Home Cruising Photo Gallery Video Gallery

 

Sail-World.com : HAWC 11M building in Hong Kong

HAWC 11M building in Hong Kong

'HAWC 11M.'    Guy Nowell ©    Click Here to view large photo

And now for something completely different. Well, a little different, at any rate. Boat designers and naval architects are always looking for ways to increase speed and fuel efficiency. There’s a fairly simple equation that says the more boat there is in the water, the bigger the engine you need to push it along at a given speed. And big engines drink lots of fuel.

So take the boat out of the water on hydrofoils, or turn it into a hovercraft – or at least make it go fast enough get out of the water and into planing mode – and you’re going to save effort, and fuel. The question is always, how much grunt do need to get the thing up and going – in the case of a hovercraft, quite a lot!

So how about an aluminium catamaran that is projected to hit 45 kts when fully loaded with full fuel and 13 passengers, powered only by two 250hp outboards? The HAWC 11m is under construction right now at Wang Tak Shipyard in Hong Kong.

‘HAWC’ stands for Hydrofoil Assisted Water Craft, and the crux of the design is a lifting foil on or near the centre of balance of the boat, and smaller ‘pitch stability’ foils towards the stern. The hull is referred to as a ‘split deep vee’ – meaning in design terms that it is a monohull that’s been split in two and the two parts separated. The central tunnel has a curved ‘M’ cross-section, the curved part of which is designed to dissipate slamming when running through rough water. The boat is being built as a ‘demo’ for potential customers such as the Hong Kong Police, HK Marine Dept and HK Agriculture, Fisheries & Country Parks.

The design is specifically suited to Hong Kong’s choppy waters. The builders confidently believe that 'she will ride smoothly and at high speeds, and with a fuel economy that surpasses all vessels of a similar size and displacement weight currently in operation.'

HAWC 11M. Split deep vee monohull with M-section -  Guy Nowell ©?nid=81589   Click Here to view large photo


HAWC 11M. Central (main) lifting foil. -  Guy Nowell ©?nid=81589   Click Here to view large photo


HAWC 11M. Aft pitch stability foils visible. -  Guy Nowell ©?nid=81589   Click Here to view large photo




The technology and the design has been available since the mid-80s, but is still relatively unknown. ‘The numbers’ suggest that a hydrofoil-hybrid boat that doesn’t attempt to get out of the water completely will achieve very similar efficiencies to a ‘full’ hydrofoil design where reduction of drag is concerned, but will less initial power needed to get out of the water.

This is not all supposition: it has been done before, tried and tested. In 2006 and 2007 a similar boat, called the ‘Kodiak Project’, achieved a top speed of 44 kts and cruised at 31 kts, using only 64 litres/hr between the two 300hp outboards. Calculated comparisons with 13 boats of similar size, displacement, weight and power indicated a 38% improvement in efficiency. In 2008 the HAWC system was retro-fitted to a Zeta Cat design, in Vancouver. The 440hp diesels and the gearbox were unchanged, and the boat’s top speed increased from 26 kts to 37 kts.

The HAWC 11 in Hong Kong will be ready for sea trials very shortly. Her backers assure us that 'this boat is guaranteed to out-perform all existing vessels of the same size and weight.' We are also reassured to hear that the boat is built to DNV and HSC IMO standards, and is intended to be operational in up to sea state 6 – 15’ to 18’ waves – and will be able to run at full speed in 4’-5’ waves.

I hope I don’t spill my gin and tonic at the sea trial…

HAWC 11M. Off the top floor... -  Guy Nowell ©?nid=81589   Click Here to view large photo


HAWC 11M. ...and safely down to the ground. -  Guy Nowell ©?nid=81589   Click Here to view large photo


HAWC 11M. All foils and u/w profile clearly visible. -  Guy Nowell ©?nid=81589   Click Here to view large photo




by Guy Nowell, Powerboat-World.com

  

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

http://www.sail-world.com/index.cfm?nid=81589

4:19 AM Tue 22 Mar 2011 GMT






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


News - USA and the World







































Audi Melges 20 U.S. Nationals - Oleander takes early lead by International Audi Melges 20 Class Association,






2014 Detroit Cup - Sam Gilmour leads by Dobbs Davis, Detroit, Michigan








Audi Hamilton Island Race Week: Riding the AC45 - VIDEO by Crosbie Lorimer, Hamilton Island










America's Cup: Five Challengers sign-on for 35th Match by Richard Gladwell/Sail-World.com/nz,


Volvo Ocean Race CEO Knut Frostad talks Time and Money (Part II) *Feature by Rob Kothe and the Sail-World team,


America’s Cup - British Challenge accepted by Golden Gate Yacht Club
Volvo Ocean Race - It’s been emotional, but it’s time to move on
Cork OCR - Sail Canada Senior Nationals wrap up
J/111 World Championships - British Teams take early lead on day 1
Round Britain and Ireland Race - Jellyfish stings British Soldier
International Cadet World Championship – Day 4 at Weymouth, England
Nanjing Youth Olympic Games - Light wind plagues Lake Jinniu
2014 Formula Kite World Championships - Bridges strike back on day 2
AWT Quatro Desert Showdown at Punta San Carlos
SAP 505 World Championship - Holt and Woelfel on top
2014 IFDS Disabled Sailing World Championship - Day 2
Audi Hamilton Island Race Week; MC38s Lindeman Island Race VIDEO
2014 Audi Melges 20 U.S. National Championship - Ready to rock
IFDS Worlds - Wind delays, but racing continues in Halifax
IFDS World Championships - Day 2 images by Jude Robertson
MS Cup - Three days until the start
America's Cup: Rod Davis - Time for a change after ten years with team *Feature
ISAF seeking hosting bids for Nations Cup
Laser 4.7 Youth Worlds - Luvisetto and Alexadr Boite victorious +Video
IFDS World Championships - Action shots by Tim Wilkes
Maxi yacht rendezvous this September in Sardinia   
World Yacht Racing Forum 2014: 'Growing the business of Yacht Racing'   
Clipper Race: 2015-16 edition of world's longest ocean race 70% full   
Sevenstar Round Britain and Ireland - Swish smash 5th World Record   
Leaderboards take shape at the Nanjing Youth Olympic Games 2014   
IFDS Worlds - Hot competition on first day of racing   
Challenging Conditions - CORK OCR   
IFDS World Championship - Day 1 for the US Sailing Team   
2014 Melges 20 World Championship - Countdown begins   
2014 Nanjing Youth Olympic Games - Day 3   
America's Cup: Team NZ wish Davis well with new team *Feature   
Fisher's View: Sailing perfection at Hamilton Island- Day 3   
Roble and Wilson still number one match racers in the U.S.   
2014 Formula Kite World Championship Day 1   
IFDS World Championship - Day 1 images by Jude Robertson   
Volvo Ocean Race: Forget the f-word - Team SCA profiled   
52 Super Series - Fleet grows, 2015 dates revealed   
420 and 470 Junior Europeans - Teams from 9 nations on the podium   
IFDS Worlds - Former president presented with ISAF awards medal   
Nanjing Youth Olympic Games - Improvements aplenty in Byte CII fleets   


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.
XLXL WAS US
LocalAds   DE  ES  FR  IT