Is this the shape of boats to come?

Status
Not open for further replies.
sea_casper

sea_casper

.
Jun 28, 2005
440
Hunter H33 2004 Mumford Cove,CT & Block Island
Boat #747 in the video won the Mini Transat.
YouTube Video


The Mini Transat 6.50 also known as Transat 650 is a solo transatlantic race that starts in France and ends in Brazil covering over 4000 miles with a stop in the Madeira or the Canary Islands. The yachts are very small considering the scope of the race, and are sanctioned by the Miniclasse 6.50 organization.
Miniclasse 6.50 closely monitors the craft but applies only minimal design restrictions such as length (6.5m), beam (3.0m), draft (approximately 2.0m), and material specificationshttp://www.minitransat650.com/html/design.html, making the mini transat 6.50 an open design.
 

Attachments

Last edited:
Argyle38

Argyle38

.
Mar 23, 2011
30
Down East Yachts Downeaster 38 040 Milford, CT
Well, the Dutch will certainly be happy in a "we told you so" sort of way. :)
 
Merlin Clark

Merlin Clark

.
Oct 26, 2005
2,057
- - Satellite Beach, FL.
Think the bouyancy forward makes it behave like a bigger boat? Like stretching out the waterline and moving the center of balance forward? In the video it looks like the boat rides more level than the other with the more traditionally shaped bow.
Pretty cool!
 
RichH

RichH

.
Feb 14, 2005
4,773
Tayana 37 cutter; I20/M20 SCOWS Worton Creek, MD
These boats are 'skimming dish' (planing) hulls with either canting keels or retractable bilgeboards/bilge keels and usually with twin rudders. All the skimming dish hulls trace back directly to the original Great Lakes / 'Seewanhaka' scow racing hulls of the 1890s.

The modern forms are the ILYA Scows: ILYA.org which until only a few years ago were the absolute FASTEST of all monohulls. The A-Scow is the largest of the sanctioned scow classes at 38ft. and requiring a crew of 6-7.
For all these wide beam boats the 'usual'/intentional amount of heel is 25° 'over' to reduce hull wetted surface area / drag.

The Melges 20, 24 and Melges 32 are simply 'scows' with higher freeboard, keels instead of bilgeboards and fine entry bows instead of the 'blunt nose' for sailing in high waves.

Info on 'modern' scows:
http://ilya.org/
http://ilya.org/a-scow.html
http://www.ascow.org/
 

Attachments

Bad Obsession

Bad Obsession

.
May 23, 2004
3,319
I'm in the market as were . Colonial Beach
Sorry....but it is ugly! I like traditional lines much, much, much better!
 
Bill Roosa

Bill Roosa

.
Jun 6, 2006
6,990
currently boatless wishing Harrington Harbor North, MD
It is a freeking plaining hull!!!!! with a weight slung under it masqurading as a keel
 
sea_casper

sea_casper

.
Jun 28, 2005
440
Hunter H33 2004 Mumford Cove,CT & Block Island
Ugly?

Bad Obsession said:
Sorry....but it is ugly! I like traditional lines much, much, much better!
Click to expand
Ugly or beauty is in the eyes of the beholder, if you are winning a tough race it is very beautiful indeed, or in other words, it may be ugly, but it sure can cook!
 
Last edited:
RichH

RichH

.
Feb 14, 2005
4,773
Tayana 37 cutter; I20/M20 SCOWS Worton Creek, MD
Winkfish said:
Take the sails off, take the keel off, put an outboard on, and you've got one heck of a marsh fishing boat!
Click to expand
You all are just jealous that your boats draw more than 2-3".

On the Great Bay and Barnegat Bay on the NJ coast ... they did have a 'class' of 'motor boats' that were built out of planked cedar with flat bottoms and blunt bows - were called "Garveys"; the modern form in fiberglass is the 'Carolina Skiff' ---- shallow bay 'speedsters'.
 
W

Winkfish

.
Jul 28, 2010
914
Boston Whaler Montauk New Orleans
RichH said:
You all are just jealous that your boats draw more than 2-3".
Click to expand
LOL!! Not jealous at all!! I just love fishing as much as I do sailing. There are a lot of Carolina Skiffs around here. Great marsh boats from what I here from owners of them.
 
SamLust

SamLust

.
Jan 2, 2008
547
Hunter 33 (Cherubini design Forked River, Barnegat Bay, NJ
Garveys are alive and well on Barnegat Bay. A while back I followed the progress of a neighbor as he built one in his driveway. You see a few in each marina here.

Those blunt bow boats certainly look like they're pushing a lot of water up in front of them. That doesn't look fast. Wish I knew more.
 
RichH

RichH

.
Feb 14, 2005
4,773
Tayana 37 cutter; I20/M20 SCOWS Worton Creek, MD
SamLust said:
Garveys are alive and well on Barnegat Bay. A while back I followed the progress of a neighbor as he built one in his driveway. You see a few in each marina here.

Those blunt bow boats certainly look like they're pushing a lot of water up in front of them. That doesn't look fast. Wish I knew more.
Click to expand
If they're 'pushing water' then probably well 'under powered', as those 'flat bottoms' generate a LOT of lift. :)
 
sea_casper

sea_casper

.
Jun 28, 2005
440
Hunter H33 2004 Mumford Cove,CT & Block Island
Design has ome advantages for cruising boats

There are some design elements of this scow design that would work for cruising boots.

The blunt bow would make the forward cabin more roomy, the foredeck being wider makes for easier anchoring and docking. the twin retracting dagger boards, do not intrude into interior space like a centerboard does. The cantilevering bulb balances the boat when reaching or beating and decreases heeling. It also allows for shoal draft under power, when needed.

Think of it as a catamaran with the two hulls completely joined together.
 
RichH

RichH

.
Feb 14, 2005
4,773
Tayana 37 cutter; I20/M20 SCOWS Worton Creek, MD
Another 'phenomenon' of the scow hull form is that the flat or 'tunneled' under-surface traps air between the hull and the water for very significant decrease in parasitic hull drag. When you sail a scow at planing speed and the boat begins to actively 'trap air', the boatspeed really 'jumps' .... and the wake becomes 'effervescent' like you just opened a bottle of champaign.

Some ultra-modern large commercial ship design is now including this 'air entrapment' (via large air compressors) with the result of upwards of 20+% 'less hull skin friction - drag'.

The real downside of a blunt bow scow form is its lack of 'reserve buoyancy' in the bow section ... its REAL easy to 'pierce' a big wave with that blunt nose, and have the boat 'sail' completely underwater ... and become an instant 'submarine'!!!!!! This is one of the reasons you only see 'scows' on relatively flat-water venues such as lakes and protected bays.
The potential to 'submarine' is probably why the very 'ugly' big/blunt, high freeboard, bow on one of the boats in the OP video is so 'huge' - to prevent 'pitch-poling' and/or 'submarining' into/under a 'big' wave.
The super-fast Melges 24 and 32 are essentially scow forms with conventional non-blunt bows ... for sailing in BIG waves.
 
sea_casper

sea_casper

.
Jun 28, 2005
440
Hunter H33 2004 Mumford Cove,CT & Block Island
RichH said:
The real downside of a blunt bow scow form is its lack of 'reserve buoyancy' in the bow section ... its REAL easy to 'pierce' a big wave with that blunt nose, and have the boat 'sail' completely underwater ... and become an instant 'submarine'!!!!!! This is one of the reasons you only see 'scows' on relatively flat-water venues such as lakes and protected bays.
Click to expand
The Mini Transat 6.50 also known as Transat 650 is a solo transatlantic race that starts in France and ends in Brazil covering over 4000 miles with a stop in the Madeira or the Canary Islands. The yachts are very small considering the scope of the race, and are sanctioned by the Miniclasse 6.50 organization.

I believe the winning boat pictured above probably did not experience too much "flat-water" and probably saw some big waves.
 
Last edited:
Status
Not open for further replies.

Top Bottom