Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 11-11-2006, 19:20   #1
Senior Cruiser
 
44'cruisingcat's Avatar

Cruisers Forum Supporter

Join Date: Sep 2006
Posts: 7,450
Images: 69
"Very Inneficient Multihulls?"

Last paraghraph of an interview with Juan Kouyoumdjian .(Designer of some quick boats)

At end of article they asked: "What is future of canting-ballast
technology?"

He replied:
"It depends on acceptance. I could argue that a canting-keel monohull
is a very inefficient multihull. Imagine canting a keel to leeward
and instead of ballast you have air. You would achieve the same
increase in righting moment in a lighter solution, and in fact you get a
multihull. Our sailing community is divided, and choices are made on
style or fashion; otherwise we'd all be sailing multihulls"


So are monohulls really just poorly designed multhulls?
__________________

__________________
44'cruisingcat is offline   Reply With Quote
Old 11-11-2006, 19:41   #2
cruiser

Join Date: Aug 2005
Location: No longer post here
Boat: Catalac Catamaran
Posts: 2,462
I love it

Rick in Florida
__________________

__________________
Tropic Cat is offline   Reply With Quote
Old 11-11-2006, 22:11   #3
Registered User

Join Date: Aug 2006
Location: Pickering, Ontario
Boat: wharram tiki 46
Posts: 24
That's great!
__________________
savvy is offline   Reply With Quote
Old 12-11-2006, 05:11   #4
One of Those
 
Canibul's Avatar

Cruisers Forum Supporter

Join Date: Sep 2006
Location: Turks and Caicos Islands
Boat: Catalac 12M
Posts: 3,209
I thought monohulls were multihulls that ran out of money...
__________________
Expat life in the Devil's Triangle:
http://2gringos.blogspot.com/
Canibul is offline   Reply With Quote
Old 12-11-2006, 11:53   #5
Registered User
 
amberdell's Avatar

Join Date: Nov 2006
Location: Merritt Island, FL
Posts: 7
that's why they're called 'half-boats'
__________________
amberdell is offline   Reply With Quote
Old 12-11-2006, 17:34   #6
Registered User
 
RandyAbernethy's Avatar

Join Date: Aug 2005
Location: Carib
Boat: Saint Francis 50 - Swingin' on a Star
Posts: 170
Please make sure that my stateroom is in the main hull, not the canting one...
__________________
Randy

Human history becomes more and more a race between education and catastrophe. -- HG Wells
RandyAbernethy is offline   Reply With Quote
Old 13-11-2006, 11:41   #7
Moderator Emeritus
 
GordMay's Avatar

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 31,571
Images: 240
Monofoil ~ designed to reach top speed in excess of 100 knots

Designed by UK aero-engineer Jonathan Howes, the Monofoil has a (single) fuselage that lifts out of the water during acceleration, causing the boat to fly across the surface of the water. A rigid wing structure provides the lift and drive, and the foil is the only thing that remains in contact with the water. The Monofoil, which begins to fly at speeds of around 46kt, will compete with catamarans, trimarans and monohulls and is set to challenge every short course ocean passage and race record.

According to the company, initial testing of the Monofoil has produced exciting results and construction of the full-scale version is already well advanced. Together with a full-scale mock-up, the main wing has been built and all the molds for the main composite components have been produced. The build schedule is expected to be completed in September 2007, with Monofoil set to make its first record attempt the 500 meters outright speed record in April 2008.
For more information, visit the Monofoil website at www.monofoil.com
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Old 13-11-2006, 19:33   #8
Registered User
 
cat man do's Avatar

Join Date: Aug 2006
Location: Brisbane Australia [until the boats launched]
Boat: 50ft powercat, light,long and low powered
Posts: 4,409
Images: 36
Maybe something similar to these Gord
Attached Thumbnails
Click image for larger version

Name:	40_Islander.jpg
Views:	118
Size:	22.2 KB
ID:	532   Click image for larger version

Name:	192_Gemini_frt.jpg
Views:	110
Size:	47.1 KB
ID:	533  

__________________
"Money can't buy you happiness but it can buy you a yacht large enough to pull up right alongside it"...............David Lee Roth
Long Distance Motorboat Cruising It Is Possible on a Small Budget
cat man do is offline   Reply With Quote
Old 13-11-2006, 20:51   #9
Senior Cruiser
 
44'cruisingcat's Avatar

Cruisers Forum Supporter

Join Date: Sep 2006
Posts: 7,450
Images: 69
Wow. Interesting sailplan.

It has "whiskers" and "paws" sounds like a cat to me....
__________________
44'cruisingcat is offline   Reply With Quote
Old 13-11-2006, 22:10   #10
Registered User

Join Date: Sep 2006
Posts: 112
Quote:
Imagine canting a keel to leeward
and instead of ballast you have air. You would achieve the same
increase in righting moment in a lighter solution,
Or to look at it another way, you guys are sailing around in monohulls with fancy keels. Kind of like the difference between the tension spokes of a bicycle wheel and the compression spokes of an automobile wheel.
__________________
yotphix is offline   Reply With Quote
Old 14-11-2006, 01:18   #11
Moderator Emeritus
 
GordMay's Avatar

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 31,571
Images: 240
Except it's wind-powered.
Goto their website - it's a rather odd looking creature.
www.monofoil.com
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Old 14-11-2006, 17:16   #12
GreatKetch
Guest

Posts: n/a
On the other hand...

I could turn the original point around and suggest that if the boat design was REALLY good in the first place it would only have required one hull!
__________________
  Reply With Quote
Old 19-11-2006, 08:23   #13
cruiser

Join Date: Aug 2005
Location: No longer post here
Boat: Catalac Catamaran
Posts: 2,462
Gord, if ya need a pilot's license can it really be called a monohull?

Rick in Florida
__________________
Tropic Cat is offline   Reply With Quote
Old 19-11-2006, 16:13   #14
Senior Cruiser
 
44'cruisingcat's Avatar

Cruisers Forum Supporter

Join Date: Sep 2006
Posts: 7,450
Images: 69
I would call it a fuselage, not a hull.
__________________
44'cruisingcat is offline   Reply With Quote
Old 19-11-2006, 23:54   #15
Registered User
 
mudnut's Avatar

Join Date: Dec 2005
Location: Australia
Posts: 666
Well,the Polynesian's will be glad to know that the out-rigger still exsists in modern technology.Mudnut.
__________________

__________________
mudnut is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 17:56.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.