Powerboat-World.com
 
 
News Home Video Gallery Newsletters FishingBoating Features Photo Gallery Sail-World Australia Australian Cruising
Sail-World Australia Australian Cruising MarineBusiness-World

 

Sail-World.com : New gyro stabilisers that won't rock the boat

New gyro stabilisers that won't rock the boat

'New gyros were installed under the aft cockpit to level the ride without adding to drag.'    Martin Flory    Click Here to view large photo

You spend all this money refitting a superyacht and it still rolls like a drunken sailor… it’s enough to make you sick. Literally.

In the case of MY Banyan, a 31-metre Palmer Johnson cruiser that was built in 1980 but extended, repowered and refurbished in 2009, help was at hand in the form of twin M7000A Seakeeper gyros.

The vessel can now travel in bigger seas to remote anchorages for her owner and charter guests, and is more stable at anchor.

The owner was very conscious of ambient noise onboard so the new system needed to be quiet. Banyan's twin 33 kW gensets serve well but amperage draw needed to be conservative.

'Hydrodynamics were a big issue for Captain Andrew Grego, having gone to the trouble of extending the hull by 4.3 metres to gain speed and fuel efficiency. With 875hp C18 CAT turbo diesel pushing top speeds of 22 knots, and 14.5 knots at cruise, he didn't want anything below the waterline that could reduce the efficiency or alter the boat's handling.

'Seakeeper required just a simple wire run. It's almost no amperage draw on the boat at all when the gyros are spooled up,' he said. 'Everything else on Banyan was first-rate technology. We thought the Seakeeper gyros provided more modern technology than a fin system.'

The two Seakeeper M7000A gyros combined produce an impressive 14,000 newton meter seconds of angular momentum, with each using a flywheel operating inside a vacuum. This aerospace-inspired technology creates powerful righting forces, whether a craft is underway, at low speed or at anchor.

One nagging problem from Banyan's extension was that the boat had more buoyancy aft than desired. Installing the Seakeeper units under the aft cockpit created an additional value by helping level the yacht.

'After a run to the British Virgin Islands it was obvious the gyros definitely make a difference,' Capt Grego said. 'At anchor, the system dampens roll by 73%, which is pretty considerable, and cruised 57 hours straight in 2.7 to 3.6 metre swells the entire way, and it was comfortable.

'I definitely see a trend toward more vessels, whether new builds or retrofits, opting for zero-speed stabilisation.'

Accommodating up to eight guests, Banyan cruises the Bahamas, Caribbean, U.S. East Coast, Newfoundland and Nova Scotia. The completely refurbished yacht includes a new cockpit, lazarette storage area and BBQ.

It offers an extensive array of electronics and entertainment in a luxurious setting, as well as snorkeling and fishing gear, Vespas and water toys.

Yacht Banyan website




by Mark Rothfield

  

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

http://www.powerboat-world.com/index.cfm?nid=87634

5:57 PM Tue 23 Aug 2011 GMT






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


Power Boat News





















Fort Lauderdale International Boat Show - 13 things to See and do by Fort Lauderdale International Boat Show,






























Yamaha inspires students to succeed by Yamaha Motor Australia,








Swan celebrates sales success *Feature by Jeni Bone,




Polar research: Six priorities for Antarctic science by Mahlon C. Kennicutt II and colleagues,


Stealth i14 out of China by Neil Patchett,


Bivalves' ability to clean chemicals from waterways
Brisbane Boat Show 2014 - New boat engines set to rev up interest
Two rescued in tow from 13km offshore
Enhancing boating safety in the Mallacoota region
National 4x4 Outdoors Show and Fishing and Boating Expo - 4WD heaven
Yanmar selected for big torque at low revs
Sydney Boat Show display winners recognised *Feature
China Yachting Conference lines up the speakers
2014 National 4x4 Outdoors Show: Popularity of caravanning and camping
2015 Sydney Inte'l Boat Show - Boating Industry commences planning
Last chance to join 2014 Multihull Solutions Whitsunday Rendezvous
Dangerous conditions for boaters from this evening
Pacific Boating membership offers hassle-free boating *Feature
Marine15 expands trade, networking and B2B opportunities *Feature
2014 Auckland on the Water Boatshow - Huge prize packs up for grabs
4X4 Outdoors Show and Fishing and Boating Expo wows water lovers
John Wilson has sights set on second P1 SuperStock title
Torquay Grand Prix - Pertemps tops table on penultimate day
Plain sailing for yachts with river cargo ship ban in Shanghai
Dangerous conditions for boaters from this afternoon
Sydney Int'l Boat Show - Stellar results for Multihull Solutions   
NSW Environment Minister awards 'Fish Friendly' Marina Accreditations   
Refurbished Protector project 'better than buying new'   
Gold Coast International Marine Expo - High-Diver Steve Black is back   
4x4 Outdoors Show, Fishing and Boating Expo - Campfire cooking corner   
See the heat with FLIR ONE *Feature   
John Temple to retire, Will Sangster appointed General Manager   
Multihull Central launches Aquila range at SIBS *Feature   
If all else fails read the instructions!!   
If all else fails read the instructions!!   
Sun shines on recreational boating at Sydney International Boat Show   
Phuket Yacht Show: new kid on the block taking on PIMEX? *Feature   
2014 Offshore Superboat Championships - The boats are back!   
Sydney International Boat Show - Days 3 & 4 *Feature   
Kirby Marine launch 13metre Naiad Tender   
Shellfish reefs in Port Phillip Bay to be rejuvenated   
2014 Brisbane Boat Show - What's your trailer boat worth?   
Custom exhaust system solves buoyancy problem   
Sydney International Boat Show - Day 2 *Feature   
Marine Rescue volunteers celebrate new unit and $120,000 vessel   


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/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 PBW
LocalAds   DE  ES  FR  IT