DUTCH TJALK (14.5m X 4m X 3.75m) Draft : 0.7m
Tjalk is a very popular type of vessel build in Holland around 1900.
Today, they are used as floating home in inland waterways, river, canal and lakes ...
In the past they could navigate under sail between Holland and England for the transport of goods.
Since, the holds are replaced by a cabin in front and a wheelhouse is added to the aft.
Often a diesel engine will replace the sail and huge liftable keels at sides.
They are still very present as home afloat in French canals.

Plans of this barge is quite difficult to draw if you want to stay true to the original.
The lines are both simple but very particular to this type.
In the past, since labor was available, builders could give curvatures to the steel plates.
Labor getting expensive, only flat and staight surfaces are used to attain exactly the same shape.
Generally speaking, vessels by "Hull Design" are "roomy" and "easy to build".
All Without compromising on aesthetics.

These plans are preliminary drawings that can go as far as drawing up accurate plans for construction.
Inevitably, accurate plans with will requiere more effort and more time.
Also it depends on material used to build the hull.
Stell, wood, epoxy,... they all require different details.

More choice of hull using MoI3D will follow.
Have fun.

Cool!
We are waiting a little tuto about the concept of drawing curves! :)

No problem for a tuto. But, there are few more shapes coming next.
The question is : which of the vessels will be of most interest ? They all are different.
Again thanks to you Pilou and no problem for a tuto.

Just a conceptual one for see how many points are used from a Plan of curves (if existing :)
What sort of curves (by Control Pts, By Points),Iso Curves, CMorph, LineWeb...
If perpendicular forms are used (Couples: don't remember the English word) , Keel...

OK. I will be busy next few days (family) and come back with an answer.

Regards
Eric

Hull desing (Tjalk) - Tuto

Tjalk is a flat-bottom-multi-chine vessel.
She has no keel, only a large steel plate of 6 to 8 mm thick which permit stable landing on the mud.
There is only 5 curves (HULL Curves) each build using only 7 to 8 control points.
The bow (nose) is a fake one in respect to its original shape.
Up to now, the general rule for any hull is :

Hull curves are simple and very easy to reproduce.
Middle portion of each curve is a straight line.
The 6th curve at top is for gangway and inclined inward according the original Tjalk layout.
In case of construction, the steel plate between each line is curved only in one direction.
Resin-epoxy is used only for small size replicas.
Otherwise steel is the unique material beside iron (old).
Frame profiles are build by plans perpendicular to longitudinal axis (not shown).
They could be spaced every 50cm (below, only one is visible).
The MoI3D "Intersection", between Hull Curves and Plans will provide "Dots" corresponding to Frame corners.
The next step is pure construction plans of the hull.
-------
"Everything should be made as simple as possible, but not simpler".
Famous e=mc2 guy.
-------

Bonjour Pilou,
I hope this will answer to your demand about "how to" ?
As you can imagine it is very simple and perhaps some personnal way of solving the problem.
Anyway, it works perfectly. Couples(fr) = Frames(us) are a further step in making plans.
Regards
Eric

Perfect!

Interesting this method, I use, the construction based on the sections and on the lines of the profiles, this approach is suitable for the new models, Thanks for sharing your method, I also prefer the old models, and I have made many hulls, but with the subdivision surfaces and which I then rework with Moi3D. 
for example this model is made in this way.






here some model on grabcad https://grabcad.com/pa.furijaz-1/models

Greetings

Maybe this script can help you in some modeling! ;)



Video (VF but very visual) https://moiscript.weebly.com/deacuteplacer-des-objets.html

https://moi3d.com/forum/index.php?webtag=MOI&msg=2749.36

This is a beautiful model and a very realistic image.
Question : Did you ever build a hull (a boat or a yacht, ...) ?
What sort of function are you using for "subdivision surfaces".
Can you tell me a little more.
Thanks Pafurijaz

Thanks Pilou. Every day I discover a new method or a new technics.
MoI3D is surprising by it's unknown functionnalities, scripts,...
Your video about MoveSliceToPoint is very interesting to save time.
I will certainly incorporate this one after reinstalling Linux, Lubuntu, Wine, .... and MoI3D into my PC.
Regards
Eric

Personally I have not built boats, but I would like to make a small rowing boat, as well as having a personal project of a motor boat, in my harddisck I have 3D models of all types, from fishing boats to landing craft, I also made drawings technicians and 3D models for shipyards and architects, I am a technical designer with a passion for boats, and I have the opportunity to collaborate on different projects, some products and others only in the form of a concept.

As for the subdivision surfaces, used mainly to model complex surfaces, it is a workflow that I have been using for many years, and only with the latest developments in CAD, I have started to integrate them, because I am very comfortable with the fast concept, and I have achieved a high level of precision in handling this geometry.
With the latest version of Moi3D I found the way to make the control cage with Blender, of which I am an old user, and I used FreeShip and DelfShip, which uses the same geometry, and also with Rhinoceros I started with version 2 and then I switched to Moi3D.

However, the subdivision surfaces are practically similar to Nurbs and Moi3D can import control cages from the OBJ format, generating identical surfaces, as you can see in this images bellow



In the forum I shared several tips but they got lost over time obscured by various topics.

Here are some of these tips, but it is nonetheless a continuous learning of new techniques to interpolate these tools, which I have been starting a few years ago.
https://moi3d.com/forum/messages.php?webtag=MOI&msg=10370.1

Below attached there is a simple example of a hull in OBJ format that you can test by importing with the new functionality present in Moi3D 4 with the SubD command, create.



I would like to make some complete tutorials but the time to do something is not much, but I will do something sooner or later.

Greetings

Hello Pafurijaz,
It takes years of Blender experience to achieve the perfect mastery like you.
Surface subdivision seems to be complexe and difficult to handle for hull design.
But your "Luxemotor" (a Dutch Barge), is perfect. I owned one, modified her and sold (photo below).
Often only people based in Europe is interested to draw such shape. Are you based in Europe ?
For a tuto about hull design I agree with you.
... not sure about a few who will profit without any return in exchange.
In any case, you are talented. We stay in contact.

I spent my childhood on "WWII Liberty Ships" type cargos where my father was commander.
Today, the dream is to build one. But in Europe such project is very expensive to be realistic.

Hi Eryon, It's not really that complex, but learning Blender is the biggest obstacle for sure.

But the subdivision surfaces give the possibility to make a continuity between the surfaces in a simple way, in fact they are mainly used in the creation of organic models, and many CAD software have implemented them in the concept phases, such as Rhino Alias ​​and Moi3D but also CAD of high level like NX and CATIA.

a link to NX brochure on page 8 is visible the use of SubD
- https://www.plm.automation.siemens.com/en_us/Images/Siemens-PLM-NX-for-Automotive-br_tcm1023-233712.pdf

This is a hull made for a project that I recently completed, and always done with these techniques.




However there are many tools that can be simpler than Blender for mesh modelling maybe you can try other application
These are few application free and not
http://www.wings3d.com/
https://rocket3f.com/
https://www.daz3d.com/hexagon-3d-modeling-free

rocket3f has also a great interoperability with Moi3D

Nice to know that you have owned a very nice boat and I love all the wooden models.

Yes, I live in Italy, and the tutorial is only to share experiences with beginners, to have returns you have to make it a job, and create videos or anything else on social channels, some live with this type of content, but it is a demanding job.

In Europe it is certainly expensive and many skills have been lost over time, but with technology today it is still possible to work at lower costs, but many shipyards now produce in Turkey, China and other eastern countries.

I hope you will continue to share works, on the forum.

Greetings

Yep Hexagon 2 was made by a French team!
It mixes Polys and nurbs! ;)
And it's now free! ;)
I don't know if it's exactly the same than the above given by Parfurijaz! (updated or not)
https://www.daz3d.com/hexagon-2-5-download-version

Thanks for your info about CAD software.
I will explore them one by one which will take me some time.
In particular, I would like to install any Windows -only- software on Linux also.
For example, MoI3D runs actually on top of Lubuntu+Wine and an another PC with Win10.

My actual traget is to found an easy to use rendering software.
Sometime ago I was using Bryce6.0 (free edition) but it disapeared.

You are doing a very nice job on boatsand hull shape.
Of course. I will continue to share hull design on this forum with more and more details.
Regards
Eric

Bonjour Pilou,
As I said to Pafurijaz, you are way ahead of me.
I need some time to study everything and catch the delay in CAD.
Have you any experience on Bryce (daz3d family product)
In your opinion, is daz3d_hexagon is close to Bryce6.0 ?
I simply need some simple and free rendering software.
Thanks for your help and best regards.
Eric

p.s. I will continu to share on this forum.

For me the more easy classical Real Time render (and free in 1920 * 800, or 1920 *1080 if you take a previous one) is Simlab Composer!
https://www.simlab-soft.com/3d-products/simlab-composer-old-download.aspx
Accept of course some nurbs format from Moi Iges, Step, Sat but no the 3DM ! ;)
all other Poly formats OBJ etc...ngons...
if you want use the "free" versions don't Download the "Try" versions!

https://simlabfr.weebly.com/light.html (la version "light")
But now all translations are automatic! :)
https://www.simlab-soft.com/3d-products/simlab-composer-lite.aspx

I have made the French Version of the UI and some other little things for it! ;)
https://simlabcomposer.weebly.com (le manuel etc)

I use only this one (SimLab) or TwinMotion I don't want headaches on my old days for my pilouteries! :)
here SimLab


No
Hexagon2 is not like Bryce it's just a true free Modeler (Polys + Nurbs) not a Landscape maker! ;)
Bryce is (was) also one of the first French prog of "Unreality" Thx Eric Wanger! ;)

Bryce can be replaced by a true easy one: TwinMotion - it's not a true modeler! (free for personal use) for me the more powerful & easy for public!
New version releasead today! :)

https://www.twinmotion.com


I f you want a true Boat hull modeler try the free PolyCad ( not so easy than Moi but...)
I have made the French translation of the site! (an heavy one) ;)
https://moiscript.weebly.com/polycad.html