Vessel Substructure to Support Rigging Loads, structure loading of Le Black cat Options

[brian eiland]

Vessel Substructure to Support Rigging Loads

Here is a posting I made in reference to the structural loading on these lake cats. I'll see if I can attach the PDF file of the excellent Seahorse article. If not you can find it on this other forum discussion.
http://www.boatdesign.net/forums/sailboats...html#post114487
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The Boat ‘Is’ the Structure

Who would have ever dreamed that a lake sailing, ultra light-weight, racing catamaran would encounter, and be capable of sustaining rigging loads comparable to those of an America’s Cup boat??

From a recent article in Seahorse magazine, “Alinghi, Birth of a Crazy Boat”, this paragraph emerges, “The boat ‘is’ the structure. These boats are now so complex, and the loads so high, that structural aspects take on a particular high importance: imagine that on a 1.2 ton boat you can reach 23.7 tons of mast compression…levels seen on an IACC design weighing over 24 tons! Also one cable in the substructure is sized at 56 tons…it is amazing that such light boats can produce such enormous loads.” (let alone absorb them, BE)
Alinghi Catamaran
http://www.boatdesign.net/forums/showpost....mp;postcount=39

...attached PDF of Seahorse article

Attached File(s)

 Seahorse_Aug2000.pdf ( 927.38K ) Number of downloads: 61

 

[Peelman]

Your's a bit late as all of this is in the below thread of over some 3000 posts

http://forums.sailinganarchy.com/index.php...p;#entry2346866

When you go thru it you will see many answers to interesting questions that lead to the Intel team here to bascially state the new boat would be a scale up of LeBlack. You will find 3D CAD drawings of the design that looks a lot like the A5 or as we call it LBOS.

[brian eiland]

Your's a bit late as all of this is in the below thread of over some 3000 posts

When you go thru it you will see many answers to interesting questions that lead to the Intel team here to basically state the new boat would be a scale up of LeBlack. You will find 3D CAD drawings of the design that looks a lot like the A5 or as we call it LBOS.

Yes I might have been a bit late by a day or two of adding to all of that jabber over on that subject thread. And even in all of that jabber I don't think there was ever a reference to that excellent article in Seahorse mag that I attached to this subject thread.

You might notice I posted my original discussion of this unique vessel back in 2006.

Had I been following all of this America's Cup crap even loosely, I'd have made a bet it was something based on these cats he has been racing on Lake Geneva. So that wasn't so difficult to figure out, given the time constraints they were under.

I haven't let myself get too excited about this race as it was just so much legal bullshit. And the last time I got excited about a multihull in the America's Cup (as I was in the business at the time), it came and went so quickly that I wondered what worth it was in promoting the multihull breed. This event will probably do the same...very little.
My contention at the time is that the NZ monohull could have been beat by a souped-up Stiletto 23...now that would have made a statement !!

What has truly propelled multihulls into mainstream is the French embrace of the vessels. I was there at the beginning, the Formula 40 racing class in France. Randy Smyth (with Cam Lewis on board) was the only American boat, and he did a great job representing the USA.

Too bad this race is about who has the biggest cock...rather than some real sophistication

[Wandering Geo]

BE, unfortunately (or fortunately depending on how you look at it) most of the historical stuff of interest has been dragged over already in one thread or another.
The Seahorse Article was previously posted and disgussed here http://forums.sailinganarchy.com/index.php...=92623&st=0 on 5 July 09 (See post 29).
This was actually a repost from contributions relating to a much earlier in the year.
I agree it is a good article and so is the seb schmidt website it came from.
It is tricky to keep track of info posted previously but a quick scan of teh threads or search can give you a feel for these things rather than cramming the site with repeated info.