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

 

Sail-World.com : Kiwi 35 'probably as stable upside down as she was upright'

Kiwi 35 'probably as stable upside down as she was upright'

'WingNuts - just as stable when ’turned turtle’ as when upright'    .

Two sailors died last week in the Chicago-to-Mackinac race, after the Kiwi 35 Wingnuts turned turtle, without losing her keel. Top Yachting writer, Eric Sharp of the Detroit Free Press (freep.com) writes:

Online sailing forums have been full of comments about the deaths of two people last week aboard WingNuts in the Chicago-to-Mackinac race. The Kiwi 35 capsized during a midnight storm on Lake Michigan, killing skipper Mark Morley, 51, and Suzanne Bickel, 41, from Saginaw. Six others were rescued.

Several yachts of similar design are entered in the Port Huron-to-Mackinac race, which starts Saturday, and some say those boats aren't safe offshore.

Yet a sailor who knows as much about Kiwi 35s as anyone, someone who helped Morley set up his boat two years ago, said Morley seems to have done everything possible to avoid the disaster.

Mike Kehew of Middletown, R.I., said Morley probably was the victim of bad luck and of the unconventional design that makes the Kiwi 35 so fast. From what I've been able to piece together, I tend to agree.

Keel yachts rarely roll over, but it isn't unheard of if the seas are big enough. What is weird is for a keel yacht to 'turtle' in modest waves and then stay upside down if she hasn't lost her keel. That's what happened to WingNuts.

WingNuts in racing mode -  Event Media   Click Here to view large photo
But Kehew, who raced a Kiwi 35 along the East Coast for five years, said a yacht designer once told him: 'The Kiwi 35 was the only monohull he knew that was probably as stable upside down as she was upright.'

'The reason is the wings,' Kehew said. 'They are essentially buoyancy tanks. And below (in the cabin) you have lockers on either side that are basically airtight. Once it went over, it would stay that way until it was pulled back upright.'

Photos of the overturned boat also made me think the culprit was the hiking wings that extend beyond WingNuts' deck.

In one photo, the mainsail is stowed on the mast that sticks down into the clear water, something a prudent skipper would do with a storm approaching. So there's no big spread of fabric underwater to hold down the boat. You can see the fin keel is intact, including the 1,000-pound bulb at the bottom.

Most yachts over 25 feet depend on a heavy keel and internal ballast for stability. On a Kiwi 35, crew weight substitutes for much of the lead ballast.

Because it is so light, and with so little wetted surface area, the boat can hit 18-20 knots (20-23 m.p.h.) in 15-22 knots of wind. As the wind tips the boat to one side, the crew climbs out on the windward wing to keep the boat flat. It's simple leverage. More wind requires more weight on the wing.

It's difficult to understand why WingNuts turtled in what were reported to be modest seas of 4-6 feet, a bit rough but nothing extreme for Great Lakes sailors. A 35-foot boat should handle waves twice that big.

But if WingNuts was hit by a big wave or gust of wind and tipped to one side, the wing on the leeward side (away from the wind) would dig deep into the water. It would happen so quickly there would be little chance for the crew to get on the windward wing to hold the boat down.

If the high wing on the windward side was then hit from below by another heavy gust, it might be enough to lift the hull and pivot it upside down.

'I agree,' Kehew said. 'I think that's exactly what happened.

For the rest of this story click here?nid=86255 and also see the links to other stories on this tragedy on the left sidebar




by Eric Sharp, Detroit Free Press

  

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

http://www.sail-world.com/index.cfm?nid=86255

10:43 AM Fri 22 Jul 2011 GMT






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


News - USA and the World























A complete recap of the most successful Melges 20 World Championship by International Audi Melges 20 Class Association,




ISAF Santander - Upwards path for Austrian women's 470 crew + video by Luissa Smith, International 470 Class Association,


























2014 Rolex Big Boat Series - Farr 40 Day 4 by William Wagner, San Francisco














Santander 2014 ISAF Worlds - Light winds and current test six classes
ISAF Sailing World Championships - Solid Day 3 for US Sailing Team
ISAF Sailing World Championships - Day 3 images by Jesus Renedo
Marseille One Design 2014 - GC32 Armin Strom blitzes final day
Volvo Ocean Race 2014-15 - Una Etapa 0 complicada para todos
Santander 49ers: Olympic Gold Medallist says two into 90 does not go!! *Feature
GBR aiming for first ever Nacra 17 Games berth at Santander Worlds
Volvo Ocean Race: Man and sail overboard as Leg 0 serves up drama
ISAF Sailing World Championships Santander 2014 – Images by Dan Ibsen
Santander Worlds – already a spectator success
ISAF Sailing World Championships Santander 2014 - Day 3 morning report
Volvo Ocean Race 2014-15 - Tales from the extreme
Volvo Ocean Race: Latest starter wins opening race
2014 J/70 World Championship - Healy, Abdullah, Becker and Borges win
2014 Rolex Big Boat Series - Full-blown, once again
ISAF Worlds - Americans jump up Laser and Laser Radial leaderboard
2014 Rolex Big Boat Series - Farr 40 Day 3
America's Cup: Luna Rossa sailing with two foiling AC45's + Video
Extreme Sailing: Emirates Team NZ retain second overall
ISAF Sailing Worlds, Santander - Rio Olympic Laser spots snapped up
Rolex Swan Cup - All set for final showdown   
Upper Midwest sailors need help to take it to the next level   
ISAF Sailing World Championships - RS:X action begins in Santander   
ISAF Sailing Worlds, Santander - Americans rise in Laser and Radial   
Extreme Sailing Series - A remarkable penultimate day’s racing + Video   
Marseille One Design - GC32 GDF Suez unstoppable in the light   
Rolex Swan Cup - Day 3 images by Carlo Borlenghi   
ISAF Sailing World Championships - Images of the leaders in Santander   
Rolex Big Boat Series - Good day for Double Trouble   
Rolex Big Boat Series - Day 2 images by Erik Simonson   
Royal Cup Marina Ibiza - TP52 fleet ready for tricky race tracks   
Rolex Big Boat Series - Plenty maintains lead   
2014 Asia Pacific Student Cup - Count down begins   
Extreme Sailing Series: Live coverage of Day 3 - view here   
Volvo Ocean Race 2014-15 - Going away   
Volvo Ocean Race 2014-15 - Practice makes perfect   
2014 J/70 World Championship - Contrasting conditions on Day 4   
Rolex Big Boat Series - 50 years of big boat racing: a retrospective   
2014 Rolex Big Boat Series - Day 2   
Snipe Western Hemisphere and Orient Champ: Rios takes the Championship   


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 NEW US
LocalAds   DE  ES  FR  IT