Re: MaXi catamaran plans ready

Hi Bernd?
Sorry. I was refering to the? mast boom set up.?
Would this work on? my Pelican
Ralph

Re: MaXi catamaran plans ready

Dear Bernd,

This is such exciting news!!! Well done! It looks an absolute cracker!! It’s one of those designs I can just imagine myself setting off along the coast in. Anyway, sorry for gushing but I had to have a fan girl moment. Keep up the awesome work.?

warmest regards,

zachary.?

Re: BUILDING DUO 900 ITALY

#8403

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

Re: Kd1000 roof templates

#8402

Forgot, here it is getting cold, in your country hot.
Send a bit of warmth to me

Cheers

Bernd

Re: Kd1000 roof templates

#8401

Ok. Thanks for the info.

No new photos, summer is coming and whether is getting too much hot to work inside the pvc cover.

I have to coordinate the work according to the weather, when its hot I work outside building the hatches for cockpit and other stuff.

When it s cloudy I work inside.

No much progress the eyes can see, but every day I'm sure I am one step forward.

Thanks Bernd

Em qui, 29 de out de 2020 15:01, Bernd Kohler <ikarus342000@...> escreveu:

Show quoted text

Hello Tiago
You can build half a roof and reverse the templates. To connect the two at the center
by using 12 mm butstrapes 300 mm wide on the? inside and out. Use filled at the corners and glass the roof also over the
butstrapps. The whole is then even stronger.
Some new photos? You was sending me a lot. But with my extreme slow internet it takes hours.

Cheers

Bernd

BUILDING DUO 900 ITALY

#8400

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 ... :-))

Re: MaXi catamaran plans ready

#8399

The mast and sails are very interesting! Is it possible to know something more?

Re: Kd1000 roof templates

#8398

Hello Tiago
You can build half a roof and reverse the templates. To connect the two at the center
by using 12 mm butstrapes 300 mm wide on the? inside and out. Use filled at the corners and glass the roof also over the
butstrapps. The whole is then even stronger.
Some new photos? You was sending me a lot. But with my extreme slow internet it takes hours.

Cheers

Bernd

Kd1000 roof templates

#8397

Hello Bernd,?

I have build one set of templates which? allows me to build half roof.

Should I build a copy of each template in order to build the complete roof, or I can build half roof and use the same templates to build the other half?

Cheers Thiago

Re: 15 photos uploaded #photo-notice

#8396

Hello

What a progress, enormously!!!? That looks good.?
Now the shape is clearly shown.
Finished for this year? I image, it is getting too cold to use Epoxy. Or perhaps with a heater some work on the inside?
We did this as we were building our Pelican. We covered the roof with "bubble plastic" for isolation from the cold
Cheers

Bernd

15 photos uploaded #photo-notice

[email protected] Notification

#8395

The following photos have been uploaded to the Eco 65 classic "Galadriel" album of the [email protected] group.

By: blitzeblau@...

Re: MaXi catamaran plans ready

#8394

Hi Ralph

I do not understand what you mean. Maxi and Manta are so different designs.
Here is nothing to compare

Bernd

Re: MaXi catamaran plans ready

#8393

Will this work on the Pelican.

Or should I rather look at the bi-rig you had on the Orynx

Ralph

Show quoted text

On Thu, 29 Oct 2020, 15:39 Bernd Kohler, <ikarus342000@...> wrote:

At last, the MaXI plans are ready. Was taking longer as expected. But I was feeling like re-inventing the wheel!

For example the mast. The costs of masts are exorbitant today. So I designed a suitable mast for the boat which is also relative easy to build.

In the “old days” of sailing. Boom roll systems?were normal. Thye disappeared from the marked besides for big boats like the Selden roll system.?

Which is more expensive as a MaXi catamaran. All other roll systems are specific made for a design and not for sale.

Much thinking was going of course in the righting system, mast float,

Water ballast yes or no. To build them is optional, but the plans include construction drawings

The study plan and plans are available here

?

MaXi catamaran plans ready

#8392

At last, the MaXI plans are ready. Was taking longer as expected. But I was feeling like re-inventing the wheel!

For example the mast. The costs of masts are exorbitant today. So I designed a suitable mast for the boat which is also relative easy to build.

In the “old days” of sailing. Boom roll systems?were normal. Thye disappeared from the marked besides for big boats like the Selden roll system.?

Which is more expensive as a MaXi catamaran. All other roll systems are specific made for a design and not for sale.

Much thinking was going of course in the righting system, mast float,

Water ballast yes or no. To build them is optional, but the plans include construction drawings

The study plan and plans are available here

https://ikarus342000.com/MAXIpage.htm

?

Re: New entry in the forum - first question

#8391

Mmmhhhh Ivan ... very interesting suggestion ... stressing only one dimension ... if the structure can remain the same (thickness of plywood, stringers etc), better LB ratio, better block ratio, different prismatic coefficient, may be less pitching, some hydrostatics calculations are necessary, it's to understand where the center of sails will be ... if the answer yo the previous questions are satisfactory with less then 50 kilos you shift from 33 feet to 36 feet! A sensitive jump!

I think that a multihull it's better to have the same wind speed till 15 kn, after that it's enough to reach 20 kn, more speed is for a good crew; at least, this is what I'm looking for, and the bigger boats of K-Design meet this target.

The only thing that I have to deeply study is a tipical legal trick, in Italy we have a law that permits a simpler documentation if the boat is under 10 meters, and some rumours say that this aspect will be deleted.

Bernd knows the answer ...

Re: General Construction Question

#8390

Hi, I cannot remember that the fillet size is specified. In any case use fillets that make sense do not use a tiny fillet to do large/strenuous work. If it is a high stress area like hull to cabin floor Berndt will design the joint to be strong enough. The normal fillets I use is about 15-20 mm Radius and it works fine. Look at the boat and use some thinking and if you suspect a flaw discuss it with Berndt, he will redesign if necessary but he will always give you prompt and good advice.

If you do some test joints and force them to give, the joint should be intact and the panel should break.

Cheers?

Philip Malan

On Friday, 16 October 2020, 20:54:23 SAST, stef <renoway@...> wrote:

when you buy plan or study plan almost everything is inside

so go find the one you whant and buy study plan it s cheap and have lot of description ,and lot to make you dream hahah

stephane b.

montreal canada

De : [email protected] <[email protected]> de la part de david@... <david@...>
Envoyé : 16 octobre 2020 08:29
? : [email protected] <[email protected]>
Objet : Re: [K-Designs-Multihull-Sailboats] General Construction Question

?

Bernd (or anyone else) - do the plans specify the size of the fillet? Is glass tape required to strengthen the fillet?

My apologies for the detail - just trying to understand the build.

Thanks!

--
stephane blanchette?
montreal canada kd860

Re: General Construction Question

#8389

开云体育

when you buy plan or study plan almost everything is inside

so go find the one you whant and buy study plan it s cheap and have lot of description ,and lot to make you dream hahah

stephane b.

montreal canada

De : [email protected] <[email protected]> de la part de david@... <david@...>
Envoyé : 16 octobre 2020 08:29
? : [email protected] <[email protected]>
Objet : Re: [K-Designs-Multihull-Sailboats] General Construction Question

?

Bernd (or anyone else) - do the plans specify the size of the fillet? Is glass tape required to strengthen the fillet?

My apologies for the detail - just trying to understand the build.

Thanks!

--
stephane blanchette?
montreal canada kd860

Re: General Construction Question

#8388

Bernd (or anyone else) - do the plans specify the size of the fillet? Is glass tape required to strengthen the fillet?

My apologies for the detail - just trying to understand the build.

Thanks!

Re: New entry in the forum - first question

#8387

开云体育

Hi Guiseppe

If the KD1000 is your choice - and I can see why as I think it is the perfect small cruising cat - it is not designed primarily for speed. As you state that speed is important to you a good way to modify the design for more speed is to lengthen the hulls by 10% or 15% but not the bridge deck. (Berndt will know what's possible) This will increase hull speed and reduce displacement to length ratios as well as creating effectively slimmer hulls for the length. All of that together with a small increase in sail area (say 5%) to compensate should give you an additional increase of something like 2 knots in maximum speed for maybe 5-7.5% increase in cost. It will also increase rough water comfort.

It should also increase resale value as a 36' cat should be easier to sell and sell for more than a 33' one.

I would be interested to hear Berndt's comments on this thought.

Ivan

Re: New entry in the forum - first question

#8386

Thanks Philip; anyway I am still freak for speed, particulary if in the sixties I'm not a boy to jump on the mast! So I'm lookink for a good compromise, as the A frame seems.
But this is matter of the other post?