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  #2241  
Old 04-09-2012
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Vor

Finally that movie that we would have liked to see live:





And meanwhile Groupama is almost claiming 3th, with a short jury rigged mast that is holding with a lot of stays

Even so they are doing 12, 15K sailing the boat very carefully and "slowly". Even faster than most cruisers we can see on the images a very "comfortable boat" and a "dry2 one. Put it back at 25K and goodbye comfort and water will be flying all around.

Don't miss that mast and rig that Cammas will proudly show to you:



Last edited by PCP; 01-13-2014 at 06:52 PM.
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  #2242  
Old 04-09-2012
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Just because it is a beautiful movie:

and makes me want to be in a boat, almost any boat:

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  #2243  
Old 04-09-2012
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Beautiful Classical boats:

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  #2244  
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Cruising:

With a French sailor on an old cat:

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  #2245  
Old 04-09-2012
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Classical boats:

Pasha a William C. Frank design.

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  #2246  
Old 04-09-2012
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New boat:

and what a boat, one of the most interesting performance cruisers of the last years, born and built on the other side of the world in NZ where they are not many but are very good at least in what regards sailing and sailing boats.

The boat is a 55ft designed by Botin Carkeek Yacht Design, the Project was managed by Steve Marten, formerly of Marten Yachts and built by Llyoid Stevenson.

Some months ago I had read a test sail by a NZ sail magazine and they said wonders about the boat and now it was the time of the conservative Yachting world to be impressed too.

The boat can make downwind with over 25K wind 19K. With 25K wind at 135º makes 16.5K. With the same angle and only with 10K wind makes 9.3K.
With 10K close to the wind makes 8.2K and with 25K wind at only 34º makes 9.1K.

This is a boat has a good cruising interior and a good tankage: 440L of fuel and 360L of water and that means a considerable load capacity for this type of boat.

Another very interesting characteristic is an hydraulic lifting keel: Down the boat has a 3.9m Draft, up a reasonable 2.3m. The boat weights 12.6T and had a ballast of 3.5T all in a torpedo.





















They say about the boat:


The hull and deck shells, along with all internal structural members, are in carbon fibre and foam cores infused with epoxy resins. Strict quality controls have been utilized to ensure all components are built to specified weight targets.

Powered by a 75hp Yanmar marine diesel engine through a sail drive unit and Gori folding propeller, the M55 is also fitted with a hydraulic lifting keel, traveller, twin backstay rams, boom vang and jib car pullers. The M55 features all electric winches and a retractable bow thruster, a Spectra watermaker is also fitted and the boat utilizes BEP's new C-Zone electrical management system.

A custom hinged carbon fibre anchor arm folds back into the anchor locker to keep the foredeck clear and the retractable prod extends the sail plan 2 metres forward of the stem. Roller furling is utilized for the cruising jib and Code Zero, with all halyards and reef lines run aft under the cabin top to keep the decks clear.

The interior cabinetry is predominantly in a semi-gloss painted finish, with solid walnut timber fiddles inlaid with carbon fibre detailing. The bench tops are Corian, while the interior soles are in solid Bamboo planking over carbon and foam panels.

The cockpit layout incorporates large comfortable seats to each side forward with a drop leaf table on centreline. Aft are twin wheels with adjustable helmsman's foot chocks either side of a large lazarette hatch. The walk through transom with sliding door also incorporates a swim step and custom dinghy davits. The cockpit sole and seat tops are laid with teak decking.

With her race boat construction, carbon rig and rigging from Hall Spars, Harken deck gear and a combination of Doyles windward sails and North Sails gennakers, this yacht promises to provide very competitive racing as well as the ultimate in cruising comfort.



....

Last edited by PCP; 04-09-2012 at 06:25 PM.
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Re: Interesting Sailboats

After all those beautiful classics, an Akilaria 40 class racer kicking ass in heavy weather sailed by only two guys.
Wind from 30 to 45K, max speed 24K.


Last edited by PCP; 04-10-2012 at 07:45 AM.
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  #2248  
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Re: Interesting Sailboats

And a J111 going also fast downwind in much less wind (about 15K) but with a full crew:

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Re: Interesting Sailboats

Definitely very interesting new boat Jörg Riechers und seine neue "Mare" - Yacht TV
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Re: Interesting Sailboats

Very interesting photo of the boat that won the last Transat for 40class racing boats, the boat that G1000 posted while I was doing this post.



Looking at this photo we can see clearly how this hull "works" and the advantages of this type of transom/hull design:

Marked by the water, at black, we can see the more usual hull sailing position that is not very different in shape to the one of a more classical boat, offering little drag.

When the boat goes to the heeling max position (like it is now) it is offered to the water a completely flat horizontal surface that provides a huge resistance to more heel, adding a lot to RM. On a classical boat at this heeling angle the surface offered is a curved one that will not offer any considerable resistance to heeling.

On bigger hell angles we are not sailing anymore, at least in a effective way, but trying to bring the boat up and on these big heeling angles form stability counts not for much. A class40 or a more classical boat will work the same way and it will count on ballast and draft (low CG) to right the boat up.

Some has a idea that a open boat has a huge form stability but a bad reserve stability or a big inverted stability. That is not true. The boat has a huge form stability a very good reserve stability and the proportion between positive stability and the inverted stability is very good by any standards.

Here the stability curve of a Pogo class40: Big AVS, big relation between the positive part of the curve (positive stability) and the negative part (inverted stability) and an overall massive static stability for a 40ft.



Compare that with the typical stability curve of an half-tonner, a popular old offshore racing boat that many consider very seaworthy:



It is also a GZ curve but in Ft while the one from the Pogo is in m. To roughly convert divide the values of the Half-tonner curve by 3.

Both boats have a not very different displacement (3.500kg to about 4000/4500g for a 40class boat).

To join to that very good Pogo static stability the boat has an even better dynamic stability related with its low mass, beam and small underwater area that makes him able to dissipate the energy of a breaking wave with kinetic movement (lateral and rotating on a vertical axis) other than a rotational movement.

These two characteristics make this light boat unusually seaworthy and capable of racing on the sea is really mean, in high latitudes.

Especially for Eric I will post the stability curve of his new boat, the cruising version of a Pogo Class40, the Pogo 12.50:



First an advertency, the Pogo Class40 curve is a GZ curve (length of arm) and this one is a RM curve. To pass from this one to the first one you have to divide each value by the light weight of the Pogo 12.50.

As you can see both curves are not very different and your boat has also a good AVS but most of all a massif righting moment at 90º of heel and a very good relation between the positive stability and the negative stability.

With this information you learn that with the keel up the boat has an AVS of about 100º and you have plenty of positive stability. This means that in settle weather and light winds you can perfectly sail the boat safely in shallow waters. In fact the positive stability of the boat with the keel up is bigger than some of the boats that have capsized on the 1979 Fastnet.

Regards

Paulo

Last edited by PCP; 04-10-2012 at 12:22 PM.
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