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  #1  
Old 11-04-2011, 05:06 AM
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Manie B Manie B is offline
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Radical new mini

This is interesting

a flat nose mini

http://www.youtube.com/watch?v=A4yms...eature=related

to me it doesn't really gel, when it hits a wave surely it should slow, this is contrary to the high speed wave piercing concepts of today

anybody speak French and let us know WHY ??

This flies against the grain like nothing else
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Radical new mini-bd_1165_transat_bahia1d-640x360.jpg  
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  #2  
Old 11-04-2011, 05:18 AM
Frosty Frosty is offline
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I havnt got my glasses on --is it going backwards
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Old 11-04-2011, 06:01 AM
michael pierzga michael pierzga is offline
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Cute little fellow...like a Bull Dog.
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Old 11-04-2011, 02:37 PM
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u4ea32 u4ea32 is offline
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The new record setting mini is just starting to approach the shape of a scow or a windsurfer. The days of the delta shape planform are over (wide stern, pointy bow).

The scow shape, when heeled, results in everything you want in a fast sailboat:
1) Very low wetted surface, as the heeled form immerses just the soft (rounded) turn of the bilge.
2) Long thin immersed shape that is aligned with motion, rather than crabbing sideways as does a delta planform. This reduces wave drag substantially.
3) Stability is far better, as the immersed form is fully at the maximum beam from bow to stern, providing 1/2BxD instead of 1/3BxD, for a 50% increase in stability at the same displacement.
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  #5  
Old 11-04-2011, 03:01 PM
Milehog Milehog is offline
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Racing rules have been distorting boats for years. Plank on edge, sandbaggers, IOR, ect. ect.
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  #6  
Old 11-04-2011, 06:05 PM
Chuck Losness Chuck Losness is offline
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Manie B
You've posted a picture of Team Work Evolution which just blew the doors off all the other competitors in the mini trans sat. There are several threads on this radical design started by Doug Lord. It was fast up wind and down wind and had several 200+ mile days in the mini trans sat. Not bad for a 21' boat.
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Old 11-04-2011, 06:54 PM
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viking north viking north is offline
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I've experienced this for years--once healed over (needed alot of wind) my blunt nosed double ended 26footer lifeboats could match and often out sailed anything in her equivalent waterline length. It caused alot of frustration with the gloved handed, matching attired, self tailing winch crowd---Geo.

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Old 11-04-2011, 07:12 PM
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Doug Lord Doug Lord is offline
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747 Scow

Heres a thread about David Raisons Mini Scow: Mini Ocean Racing Scow
He just won the Mini Transat race very convincingly in conditions all his critics said would be his undoing.

click on image:
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Radical new mini-mini-scow-bottom.jpg  Radical new mini-mini-raison-loris-von-siebenthal.jpg  
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Old 11-04-2011, 07:17 PM
bruceb bruceb is offline
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scows

Inland lake scows, (Melges and others), have been shaped like that, and gone fast for many years- I wonder why it hasn't been tried sooner? If nothing else, think how much more foot room there could be in a "V"? berth B
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  #10  
Old 11-04-2011, 11:23 PM
sharpii2 sharpii2 is offline
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Quote:
Originally Posted by Manie B View Post
This is interesting

a flat nose mini

http://www.youtube.com/watch?v=A4yms...eature=related

to me it doesn't really gel, when it hits a wave surely it should slow, this is contrary to the high speed wave piercing concepts of today

anybody speak French and let us know WHY ??

This flies against the grain like nothing else
I don't speak French, but I can think of four good reasons why.

1.) Mini's sail mostly downwind in most races, so there is less chance of the squared off bow slamming into waves rather than slicing through them.
2.) The buoyant, squared bow doesn't dig in when running before the wind like a pointed bow does, lessening the chance of the boat pivoting around it and broaching.
3.) Since there is far less bow curve from side to side, the curve must be up and down. As the boat goes faster, water is stuffed under the bow instead of being pushed aside. This raises the bow, putting the boat in a planing attitude.
4.) Mini's are designed to a 'Box Rule', which limits maximum Beam, maximum Length and maximum Draft. Once those limits are reached, the game is to get the maximum righting moment and minimum drag within those limits. The scow hull form does this in two ways:
A.) It allows the Center of Heeled Buoyancy to shift further to leeward than a pointed bow boat of the same Beam, increasing the Righting Arm, and
B.) Since it has wider sections up front, its average depth can be less, allowing a much easier run fore and aft for the same displacement. When heeled, scows present a much straighter run than when upright. With a pointed bow boat, especially a sharply pointed double ender, the opposite is true (but only if the scow's bow and stern transom corners don't dig in).

The scow hull form is about the lowest cost means of getting high speed from a sailboat. The multihull is the next.
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  #11  
Old 11-09-2011, 04:12 PM
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Manie B Manie B is offline
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Well folks
this boat is going to change things
lots being written about it after the win - good stuff

isn't it interesting that this "PD" copy doesn't look stupid anymore

http://www.youtube.com/watch?v=puOZH...eature=related

all of a sudden even myself is looking at a flat nose in a different light

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  #12  
Old 11-09-2011, 04:53 PM
DCockey DCockey is offline
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Some traditional Dutch boats also have rather blunt bows though they would not be considered high performance today. Traditional shapes were almost certainly strongly influenced by tradtional construction methods, in particular how wood likes to bend. "Molded" construction allows much more freedom in shape.
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  #13  
Old 11-09-2011, 05:38 PM
Wavewacker Wavewacker is offline
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Frosty, it's a sailing landing craft....
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  #14  
Old 11-09-2011, 05:47 PM
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Doug Lord Doug Lord is offline
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747 Scow

While I think David Raison's outstanding achievement with the scow design coupled with his brilliant sailing deserves every bit of credit he is getting ,there is a new "revolution" waiting in the wings. Hugh Welbourn's DSS mini will be almost a 100% opposite to the scow-it is very narrow and uses a hydrofoil to develop additional righting moment. I will follow this boat closely and am awaiting more info from Hugh Welbourn-but it seems to have enormous potential:

click on image:
Attached Thumbnails
Radical new mini-dss-foil-ocean-navigator.jpg  Radical new mini-dss-isotop-sa-mystery.jpg  Radical new mini-dss-mystery-boat-sa-9-15-11.jpg  

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  #15  
Old 11-10-2011, 07:56 AM
Frosty Frosty is offline
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Its porbably a copy of a hull with a round nose on it so the judge cant do em in for copy rights.

Happens all the time ,--a little strake here and there or a rounder nose. Oh no --nothing like your boat!!!
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