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  #6211  
Old 02-19-2014
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Re: Interesting Sailboats

I'm liking the look/concept of the RMs more and more.. looks like a fun boat to own and sail.

I'm wondering if they are prone to pounding in a chop with those flat forward sections? Even more extreme than the flat sections on some IOR designs, which are known to pound quite badly...
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".. there is much you could do at sea with common sense.. and very little you could do without it.."
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  #6212  
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Re: Interesting Sailboats

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Originally Posted by Faster View Post
I'm liking the look/concept of the RMs more and more.. looks like a fun boat to own and sail.

I'm wondering if they are prone to pounding in a chop with those flat forward sections? Even more extreme than the flat sections on some IOR designs, which are known to pound quite badly...
I talked with one owner he said that "pounding in a chop is only a noticeable while motoring"
I understood that as soon as the boat heels over there is no problem with the flatness in the middle.
RM 1260
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  #6213  
Old 02-19-2014
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FIPOFIX and Norbert Sedlacek

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Originally Posted by capt vimes View Post
20 k US$ for the m² with 2-5 mm thickness...
and since it is essentially a ceramic (even if aluminium based) you can bake it in any form you like... i just use to call it "transparent aluminium" since i am an old treky...
Yes those kind of materials will have a huge use in the future. What makes them expensive now is the high technology needed to make them but I suspect that it will end in the future, not the technology needed but the costs involved in using it. We have already talked about Salonas using Carbon/Basalt bulkheads and also about Fipofix...and talking about that let's have some news about my preferred lunatic: Norbert Sedlacek on its tiny mini yellow racer made of fipofix (Vulcanic Carbon fiber):



Yes I think that he is mad but that does not mean that I do not have a huge respect for him his resilience and sailing skills, even a lot more now than some time ago.

Norbert is alone on an Atlantic Transat, on a particularly bad and stormy year and it looks that he had managed to make the worst part of the voyage, since he is now, after 33 days at sea, past the Canary Islands. He is not much worried because he says he has provisions for more 60 days.

In fact he is quite happy now that he is approaching the trade winds. If you think (like me) that all this is a bit mad let me say that he is without autopilot almost from the beginning and stays outside on the cold on a Dry-suit 19 to 20 hours a day. He says that eating, using the head or sleeping is a bit acrobatic or involves some sort of heaving...and I believe him

He deserves a big Chapeau for having reached here steering by hand on a minuscule boat on very adverse conditions and many chapeaus if he manages to reach St. Augustine / Florida. I hope that some of you are there to receive him. He is mad but what a feat and what a sailor

Open 16 FIPOFIX - Live Tracking

https://www.facebook.com/norbertsedlacek.at
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Last edited by PCP; 02-19-2014 at 11:24 AM.
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  #6214  
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Rm 890

Quote:
Originally Posted by knuterikt View Post
I talked with one owner he said that "pounding in a chop is only a noticeable while motoring"
I understood that as soon as the boat heels over there is no problem with the flatness in the middle.
RM 1260
This photo may help to explain that:



The bottom is in V but heeling upwind the boat will not be falling on the bottom but on the side and since, even if very beamy, has fine entries, as you can see by the deck form near the bow, on this photo....



the boat will not pound excessively. Besides, as Erick can explain here better than anybody, you don't sail these boat like I sail mine going upwind with less than 30º apparent wind but with a bigger angle because these boats, with their huge power, go much faster a bit more out of the wind and can compensate that way in VMG. In the end you take waves at a much better angle and that will also allow for less pounding than if you took then really hard on the wind.

Regards

Paulo
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Last edited by PCP; 02-19-2014 at 11:47 AM.
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  #6215  
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Re: Rm 890

Quote:
Originally Posted by PCP View Post
This photo may help to explain that:

The bottom is in V but heeling upwind the boat will not be falling on the bottom but on the side and since, even if very beamy, has fine entries, as you can see by the deck form near the bow, on this photo....

the boat will not pound excessively. Besides, as Erick can explain here better than anybody, you don't sail these boat like I sail mine going upwind with less than 30º apparent wind but with a bigger angle because these boats, with their huge power, go much faster a bit more out of the wind and can compensate that way in VMG. In the end you take waves at a much better angle and that will also allow for less pounding than if you took then really hard on the wind.

Regards

Paulo
I was looking for a picture like that
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Alumarine 48

A voyage aluminium cat it is not unheard but pretty unusual. Alumarine has one on the market designed by Pierre Delion. It has just hit the water.

I cannot say I like the Cabin, particularly its flat big "windows" and big lateral windage. I don't like also that frontal "door" or that living space ahead but in what regards hull design and rig design, I like it. Many of those details have to do with the first owner and the boat is easily transformable in something more interesting since the aluminium has that advantage: no molds, so easily modifiable.







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Last edited by PCP; 02-20-2014 at 09:35 PM.
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Unhappy Sad Images

and even so two impressive notes:

That wreck was maintained afloat by the system devised to make it unsinkable, even broken in two and pushed down by almost 4 T of ballast.

even in that state and battered for more than a week by a huge storm that keel maintains itself attached to the hull.

I hope they can found out what went wrong on that hull and if needed take preventive measures to make these boats even more seaworthy.











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Re: Interesting Sailboats

Juan K and team has some explaining to do - first Rambler 100 (Speedboat) capsize in the Fastnet a couple years ago, Artemis AC72 breakup and death of Bart, now Cheminees IMCO 60 broken into a few bits???
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Re: Interesting Sailboats

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Juan K and team has some explaining to do - first Rambler 100 (Speedboat) capsize in the Fastnet a couple years ago, Artemis AC72 breakup and death of Bart, now Cheminees IMCO 60 broken into a few bits???
Or maybe that happens more to the ones that have many top racing boats. It happens more to him because he has more top offshore racing boats than anyone else. His boats dominated the two last VOR and did not broke.

Rambler lost the keel and capsized due to that. I can remember several top racing boats that lost canting keels. They are still learning about reliability on canting keels, mostly in what regards metal fatigue. Rambler was far from new when he lost the keel. Maybe some pieces should have been changed already. That kind of calculations regarding efforts on keels and even the building of the canting keels themselves as to do with engineers and it is a very specialized subject.

Cutting edge boats, even some cruising ones are today designed by a team. The NA is the leader of the team but he is there for the general concept and to keep the team on track. The design is a cooperative effort.

Regarding Artemis America's cup cat he was just one in a team. Those boats are designed by an even bigger number of specialists. If you want to blame somebody blame the engineer responsible for the boat structure and efforts calculation.

I am not saying that in what regard Cheminees Poujoulat there was not a problem with the design. I don't know. The boat was holed and repaired on the area where it broke. Let's see what they can find from the analysis of the wreck before putting blame on somebody.

Regards

Paulo
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Last edited by PCP; 02-19-2014 at 07:50 PM.
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Onne van der Wal

I have been posting here about great marine photographers and film makers. The object of his work are boats and great images and we love boats and are most grateful to the ones that provide us with great images. I have no doubt that they love boats too.

Today we are going to talk about the Dutch Onne van der wall. Born in Holland, raised in the Dutch South African community and living in America on the last 30 years, in Newport.

No more talking since the images will talk by themselves:

Shooting on the water with Onne from Onne van der Wal on Vimeo.



Onne video show reel December 2013 from Onne van der Wal on Vimeo.

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Last edited by PCP; 02-20-2014 at 07:23 AM.
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