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BUILDING DUO 900 ITALY

 

Hi Bernd and to the whole forum
I started building the DUO 900 Italy for one of my clients.
I'll be posting some pictures on the forum soon.
90% original built boat, except the hull connecting beams, I will build them in composite resin / plywood / fiberglass.
Bye
PS There is no lock-down in Italy yet but he doesn't stop me either ... :-))
 

Hi Domenico

Good to hear that you have started. To change the beam connectors in this way is okay.
Lucky you, France has again very strict restrictions

Bernd
 

Hi Bernd and to the whole forum
I opened a new folder with photos on the new construction of the DUO 900 Italy
Bye

PS photo folde? ??/g/K-designs-Multihull-Sailboats/album?id=256248
 

Hi Domenico

Funny, it looks strange. The DUO 900 is a special boat. Thanks for the photos

Cheers

Bernd
 

The hulls look extemely narrow ? Hans
 

Hi Hans
Yes, the boat has very narrow hulls as they are asymmetrical in shape.
The two cabins are a bit sacrificed but between the BH5 and BH4 you can do a tilting cover when you are stopped in port or in a cove.
It is a very fast and light catamaran despite its 9m long.
Bye
 

Hi Bernd
I added new photos with all the BHs ready.
Even the scuffed strips are ready.
PS I saw that you have some photos of the duo 900 in america? On your facebook.

foto? ? ? ?/g/K-designs-Multihull-Sailboats/album?id=256248
 
Edited

I do not know what you mean and where they are. Can you please show me?
But funny coincidence got yesterday some photos from a DUO 900 built in Turkey
A very original interpretation.?
Cheers
Bernardo

DUO900port.jpg
DUO900bow.jpg
DUO900sideview.jpg
DUO900aft.jpg

 

I was wrong it was one of these photos you put. It's the front one ...
nice boat except the central area aft I do not like. I have another idea behind the boat.
Looking at such narrow hulls, I am very curious to see the speed of the DUO900 ...
 

Domenico
The boat building company in Turkey never contacted me what the want to change. For instance a center rudder will not work well on a boat with such a high? L to B ratio.
The construction of the fore beam is like a sculpture. To you, do not change anything on the boat (besides the beam connectors. The original was sailed from Argentina to France.
Look at the wind direction prediction for the region he had to sail the boat. The wind was logical for 90% of the time against the course direction. The high L/B ratio of the hulls
and the asymmetry were making the journey to a success. The boat sails wonderful to windward. The asymmetry minimalises yawing in big waves by his dynamic. So slender hulls
give not much play for error in the design and the construction. Weight is very critical. So, if you want to change something, consult me first!!
Bernardo
 

In fact, I proposed to the customer the DUO 900 for me it is the fastest boat of its competition and in the Mediterranean it is fun to sail since there are no great navigations between one coast and another.
?
Returning to the boat made in Turkey, I have already told you that I do not like the stern (behind), with that central rudder it is too excessive a weight, which I can move elsewhere. In the DUO 900 Italy the rudders will be two, the small engine will be central with a bracket (which is sold) and the wing mast that collapses (like Corsar trimaran).
For me, the boat must be comfortable to carry on a trolley, including its mast, so that I can travel all over Europe.
?
As for some small changes, the customer asks me if it is possible to add some panels aft to reach the two hulls.
The two beams of boat connections, I'll show you some drawings as I have in mind to make them in marine plywood, fiberglass and epoxy. So you tell me if it's okay as I have them in mind, or do it differently, as you think.
 

Hi Bernd
?
I made some drawings (not exactly precise) but you can see the way I want to make the connecting beams and all the wheelhouse.
I also made the new line behind the boat the shape of the planking so as to sit well with the back supported. What do you think about it?

DUO 900 Italy new line.jpg
DUO 900 CONNECTION E RUDDER.jpg
DUO 900 ITALY BEARINGS 1.jpg
DUO 900 ITALY BEARINGS.jpg

 

Hi Bernd
Added more photos on the construction of the DUO 900 Italy.
Put all the BHs in place on the rail and insert the scarf strips.

/g/K-designs-Multihull-Sailboats/album?id=256248
 

Hi Bernd
Added more photos of the DUO 900 Italy
Almost finished gluing the wooden strips.
By the weekend I close the hull with the planking.
Bye

foto? ??/g/K-designs-Multihull-Sailboats/album?id=256248
 

Added other new photos of the Kd Duo900 Italy
/g/K-designs-Multihull-Sailboats/album?id=256248
 

Good evening to everybody,
I added new Photos of the Duo 900 Italy. The hull is completed I have just to add the fiberglass and then I turn the hull
/g/K-designs-Multihull-Sailboats/album?id=256248
 

Good evening to everybody,
I added new Photos of the Duo 900 Italy. The hull is completed I have just to add the fiberglass and then I turn the hull
/g/K-designs-Multihull-Sailboats/album?id=256248
 

Hi Bernd
?
Finished hull and turned 180 ¡ã and started the cabin.
?
Photo?

?/g/K-designs-Multihull-Sailboats/album?id=256248
 

Hi Domenico
Nice to see the progress. Great work. I like that you changed the aft part on the cockpit
Have fun in Sardinia.

Cheers

Bernd
 

Hi Bernd
I have added new photos on the DUO 900.
I applied epoxy primer and I wait for the welder to finish all the welds of the pipes (forestay connection, mast base, etc.) and paint. Even the pipes will be painted, just a little away, only the pipes, trampoline and etc are all jobs that I can do in December.
Now on Monday 4 October 2021 I start the second construction of the KD122 and by the beginning of December I finish the two hulls.

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