Lars Modin Design

Sorry but there is no GA made yet. This design started in another thread that was later splitted and we lost track or interest, I don´t know. But in one post I wrote the following;

"The 50 m as above will have a beam of about 17 m / 55´.
The inside space on the main deck will be 400 sqm and the deck above 260 sqm and the upper deck 144 sqm. The hulls will have liveable space of 80 sqm each (plus engine rooms) totalling 960 sqm indoor living space! (I guess you add a zero to have it as approximate squarefeet?)
Add to this the extensive deck areas and I think a big power-cat is more than justified when it comes to available space. But you will have to pay extra for the beam in many ports..."

When it comes to how a cat behaves at sea, there are different opinions and some like Swath hulls, other Wave Piercers, many prefer twin Symmetrical hulls and I have best experience with Asymmetrical, but only from higher speeds in offshore powerboat racing...

The yacht above should have a cruising speed between 15 and 20 knots I think and this can be achieved with any of the hulls mentioned and Diesel-Electric propulsion.

And finally, I don´t think it is useful to compare the space on a cat with that of a monohull, since there are so many other things that are more important. Probably the price per sqm is about the same in the end anyway?

M I S T Y , 75 m / 245´

On "request" from our fellow member René GER, who wanted to see a yacht in the 60-80 m range, I have made a smaller version of the 85 m Modesty. She is 75 m and is then called Misty. All of my designs with these straight decks can be made both longer and shorter without losing too much of it´s original character.

Sure, I can extend the helideck to an airstrip if you like.
Otherwise, certainly not triple the length, more like 20 percent each way...

And Carl, thank you but it is not the same class as a Classic Broward

If you think of it from the Heli-pilots view, it is better with a deck that is lower down and in the stern so that you can make an approach with the yacht as a reference of altitude in front of you and a low deck is moving less sideways as well. As Misty and Ilona with a garage under the pad, it is also better to have it low in the stern, or on foredeck, but there instead you will have a problem to land if the yacht is underway.

However on Gigayachts with wide beams you can land pretty safe even on higher decks as the margins are larger and the boat is less swinging.

You can also make a helideck on top deck more or less invisible and if you are not carrying your own helicopter this is probably the best for the look of the yacht.

You need a good designer, that is all

But seriously, if you look at Misty you will see the tender garage in front of the heli-lift. All yachts have their solutions and in the size we are playing with now, there will probably not be guest accommodations below maindeck, so the crew have all this space for themselves and the gadgets...

As I am a designer and not a naval architect, I will not go into any details on your question. My understanding is that a yacht of 75 m loa can have a beam of 14 m and a draft of less than 4 meters. This limits the access to some areas in the Carribean but generally not to ports where the length is accepted.

A yacht of 75 to 85 m is the biggest you should consider if you like to use it as a yacht, bigger than this you are more like a cruiseship when it comes to port access and anchoring.

Chianti II, at 50 m/164´the most popular size?

The 50 m size is probably the epitome of a Superyacht, big enough to go anywhere and still not bigger than you are welcome in most ports. This particular yacht is presented with all deck plans in another thread on the YachtForums http://www.YachtForums.com/forums/showthread.php?t=1627 but I have given her a more (modern?) edgy profile now.

In the book The Superyachts 2005, I found that there are no less than 78 Superyachts between the 49 m Oceanco-built Netanya and the Feadship Rio Rita at 51.99 m LOA.

Meet Cerise and Calege...

"On demand" the 160´ Cat design has now been remodelled to a 180 feet monohull expedition style yacht and the 120´Cat to a 135 feet yacht. Both will be quite beamy and with the extensions the interior volumes will remain about the same as with the catamarans.

Thank you Brian! Those words coming from a fellow designer is warming...

With regards to bubble-design, I have tried to make something of the kind, but eventhough pretty simplified they have not made it to the computer yet. This was made in a notebook and the bubbliest I have been so far...

/Lars

Hi again!

I have found the missing yacht through another Forum. She is in Hong Kong under the name of Grand Cru. They say she was finished in Greece in 1996 and has had two other names as well. She is all white and here is a little pic from above. Mystery solved!