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  #5651  
Old 01-06-2014
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Re: Interesting Sailboats

OK, I'll go with that but it may have more to do with longitudinal center of flotation (LCF) than LCG.
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  #5652  
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Re: Interesting Sailboats

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Originally Posted by bobperry View Post
OK, I'll go with that but it may have more to do with longitudinal center of flotation (LCF) than LCG.
You are the NA, I am just a lawyer...

I just repated (and tried to translate) what Boris Herrmann (German navigator of Maserati) told...
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Re: Interesting Sailboats

Rob:
I don't know. I'm just speculating and because LCG and LCF are usually quite close together that it involves both centers. A boat will change fore and aft trim around trhe LCF. But it would be hard to move LCG aft without also moving LCF aft also. Not impossible but unusual.
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Cape 2 Rio

Update on the situation:

One more boat returning home, a Vand de stadt 34, Indaba with an injured crew member.

Regarding the others returning home or in trouble and the conditions:

"The majority of the fleet were still suffering rough sea conditions last night with poor visibility and a lot of rain this morning.
The current situation on the following yachts:

BILLE (Bavaria 54) – All crew of have now been transferred to SAS Islandwana. Two reported injured crew, the skipper with broken ribs and one crew member with lacerations..
Then the navy managed to clear all damaged rigging and have left the vessel to return to later. Once crew were secured, SAS Islandwana immediately left the area to go to assist yacht AVA.

AVA (Miura) – We have just had a report from SAS Islandwana that they have spotted yacht in very poor visibility. AVA sailing without power and communications but all well on board. SAS Islandwana now on their way to yacht Isla.

ISLA ( Schionning cruising cat ) reported late last night taking on water in the engine compartment and an electrical fire. They have had a container vessel Bosun, standing by for assistance since early this morning. All is under control and the yacht has decided to continue under sail to Saldanha. Smit Madura is on station with yacht Isla possibly to tow them back to port.

BLACK CAT (DiDi 38) – NSRI Station 3 are on route to tow her back to shore due to no steerage from a broken rudder.

.....

PEEKAY (Beneteau 51) safely in harbour at Yachtport.

DO DO (Fortuna 37 ), AVOCET (Beneteau 45), AVANTI (Vickers 41) and FTI Flyer (Charger 33) – are currently heading back to shore.

Tranquillo are only able to receive calls, otherwise all well.

....
Some trackers have been reported not to be moving but XtraLink are on top of each issue and most should be sorted by now."


We don't have any weather information trough the tracker. I will look at it later to see what they have ahead but for now all on that are racing seem to be doing well, including the smaller boat, a SF 3200 that sailed duo is on the front pack, behind the big boats.

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Yelken Octuri

Do you have ever heard about Yelken Octuri, Yeh, I know he is just a designer and that their designs don't have a technical basis, they did not even make sense... but who cares, we all need to dream and his drawings are beautiful:





Don't miss the drawings that are better than the movies:

Flying yacht - OCTURI - Design & Interior, Fictional aircraft, Light

Sailing aircraft - OCTURI - Design & Interior, Fictional aircraft, Light
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Old 01-07-2014
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Re: Interesting Sailboats

Quote:
Originally Posted by robelz View Post
... and the center of gravity is further aft to enhance downwind performance.
But that would mean massive changes to the hull...
How can you bring the CG further aft without moving the heaviest parts - keel and mast?
And moving weight around like motor would definitely don't do the trick on an mzig ton boat... Heck - their sail wardrobe is heavier...
I doubt that this has been done... Why invest money in a dead horse?
The VO70s are gone, which is sad and a shame...
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Re: Interesting Sailboats

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Originally Posted by capt vimes View Post
But that would mean massive changes to the hull...
How can you bring the CG further aft without moving the heaviest parts - keel and mast?
And moving weight around like motor would definitely don't do the trick on an mzig ton boat... Heck - their sail wardrobe is heavier...
I doubt that this has been done... Why invest money in a dead horse?
The VO70s are gone, which is sad and a shame...
Maserati isn't supposed to do the VOR, it is rebuilt as a record chaser... That is why they modified it...
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Re: Interesting Sailboats

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Originally Posted by robelz View Post
Maserati isn't supposed to do the VOR, it is rebuilt as a record chaser... That is why they modified it...
i know - it cannot do the VOR any more... record chasing is good, but it does not answer my questions:
'But that would mean massive changes to the hull...
How can you bring the CG further aft without moving the heaviest parts - keel and mast?'
the keel alone holds around 45% of the weight - you know that moving the fixture of a canting keel means MASSIVE reconstruction of the support structure?
why in the world should anybody do that?
it is probably cheaper - and safer in terms of structural integrity - to build a new hull from scratch...
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Re: Interesting Sailboats

Quote:
Originally Posted by capt vimes View Post
i know - it cannot do the VOR any more... record chasing is good, but it does not answer my questions:
'But that would mean massive changes to the hull...
How can you bring the CG further aft without moving the heaviest parts - keel and mast?'
the keel alone holds around 45% of the weight - you know that moving the fixture of a canting keel means MASSIVE reconstruction of the support structure?
why in the world should anybody do that?
it is probably cheaper - and safer in terms of structural integrity - to build a new hull from scratch...
Wouldn't it be possible just to fix the bulb further aft? Making an L out of a T?
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Re: Interesting Sailboats

It has already been on a weight reduction program, resulting in a 10% drop in weight. Just as with roadgoing Maseratis the weight distribution has been optimized rearwards, to make it particularly well-suited to high-speed sailing.

From the Maserati page...
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