Please select your home edition
Edition
Barz Optics - Floaters

HAWC 11M building in Hong Kong

by Guy Nowell, Powerboat-World.com on 22 Mar 2011
HAWC 11M. Guy Nowell © http://www.guynowell.com
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.'









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…





Zhik ZKG 660x82Ancasta Ker 33 660x82Barz Optics - San Juan Worlds Best Eyewear

Related Articles

A Q&A with US Sailing’s Malcolm Page about the Sailing World Cup Miami
I spoke with Malcolm Page, US Sailing’s Olympic chief, about the team’s performance at the 2017 Sailing World Cup Miami I talked with Malcolm Page (AUS), a two-time Olympic gold medalist in the Men’s 470 class and the chief of Olympic sailing at US Sailing, to get his pulse on the team’s performance at the 2017 Sailing World Cup Miami and discuss some recent coaching changes within the Olympic-sailing program.
Posted on 20 Feb
America's Cup - Emirates Team NZ give first look at the pedaling AC50
Emirates Team New Zealand formally christened their new AC50 America's Cup Challenger on a rainy Auckland afternoon. Emirates Team New Zealand formally christened their new AC50 America's Cup Challenger on a rainy Auckland afternoon. The team has been sailing for the previous two days making news headlines after it was revealed in Sail-World.com that the AC50 would become only the second yacht in America's Cup history to use pedal power.
Posted on 16 Feb
America's Cup - Kiwis sign Olympic Cyclist for the Tour de Bermuda
Ttop cyclist Simon van Velthooven, a 2012 Olympic Bronze cycling medallist had been signed by the America's Cup team Emirates Team New Zealand put in a second foiling display on Auckland's Waitemata harbour ahead of the official launching of their AC50 tomorrow. With brighter skies the cycling team took their places on the pedalstals and used leg power to provide the hydraulic pressure necessary to run the AC50's control systems for the foils and wingsail.
Posted on 15 Feb
A Q&A with Shawn Macking about the StPYC’s Sailing Center and OD fleet
I talked with Shawn Macking, the StPYC’s waterfront director, to learn how the club is getting more people out sailing. I caught up with Shawn Macking, waterfront director of the St. Petersburg Yacht Club, via email to learn more about the club’s Sailing Center, its hefty investment in a new fleet of ten J/70s, and how the StPYC is using this infrastructure to expose more people to the sport we all love.
Posted on 13 Feb
A Q&A with Karen Angle about the 2017 Conch Republic Cup race to Cuba
I caught up with Karen Angle, executive director of the Conch Republic Cup, to learn more about this exciting event. If you’re like me and have arrived at saturation with winter’s cold rain and snow, imagine racing to Cuba as part of a 13-day cross-cultural event that’s designed to lower barriers of entry at a time when some Americans see a need for taller walls. I caught up with Karen Angle, executive director of the Conch Republic Cup, to learn more about this exciting event and the adventures it affords.
Posted on 23 Jan
A Q&A with Anna Tunnicliffe about her return to competitive sailing
I talked with Anna Tunnicliffe before the Sailing World Cup Miami to learn about her return to Olympic-class sailing. Anna Tunnicliffe won gold at the Beijing 2008 Olympics in the Laser Radial before shifting her sights to the Women’s Match Racing event for the London 2012 Olympics. Here, she came up shy of expectation and left sailing for the CrossFit Games, but now she is returning to her roots. I talked with Tunnicliffe before the Sailing World Cup Miami to learn about her return to Olympic-class sailing.
Posted on 23 Jan
A Q&A with Dick Neville, Quantum Key West Race Week’s RC chairman
I caught up with Dick Neville, Race Committee chair for the Quantum Key West Race Week, to learn more about the event. For the past 30 years, international sailors have gathered in Key West, Florida, each January for Key West Race Week, a regatta that has achieved legendary status due to its calendar dates, its location, and the impressive level of competition and racecourse management that this storied event offers. I caught up with Dick Neville, Race Committee chair for this year’s Quantum KWRW, to learn more.
Posted on 16 Jan
A Q&A with Daniel Smith, the Clipper Race’s new deputy race director
I talked with Daniel Smith, the Clipper Round The World Race’s new deputy race director, to learn more about his role. I was fortunate to sail with Daniel Smith [36, SCO], skipper of “Derry~Londonderry~Doire” for the 2015/2016 edition of the Clipper Round The World Race, when the fleet reached Seattle last spring. Now, Smith has been hired as the event’s deputy race director-a job that will test many of the skills that he polished as a skipper. I caught up with Smith via email to learn more about his new job.
Posted on 9 Jan
Rolex Sydney Hobart Yacht Race - Suck it up, sunshine!
The 72nd start of the iconic blue water classic had 300,000 spectators lining the foreshores of Sydney Harbour The 72nd start of the iconic blue water classic had 300,000 spectators lining the foreshores of Sydney Harbour, another two million watching on TV, and the constant buzz and whir of media helicopters overhead. 88 boats, from Australia, USA, UK, Germany, Sweden, Russia, Japan, Korea, China, oh and New Zealand, had lined up on three start lines.
Posted on 31 Dec 2016
Rolex Sydney Hobart Race - More merriment on the airwaves
Here are more examples of merriment on the airwaves between the boats and Hobart Race Control So on December 29, 2016, after the River Derwent had let just three boats home (Perpetual Loyal, Giacomo and Scallywag, all inside the old race record, she went to sleep for a lot of the day. This made it frustrating for the sailors, some of whom saw the lighter side. So after seeing some of those in Dark & Stormy, here are more examples of merriment on the airwaves between the boats and HRC
Posted on 29 Dec 2016