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Im a novice with CAD, (I use Qcad) and wonder if there exist any program which can make splines from a drawing.
If you are interested in boats you can get a free download of DelftShip that is nice to use for drawing hull surfaces. You start a new model and set the longitudal points to the number of splines; I think it is 19 or 20. Expand the bodyplan view to full screen, right click in the window and you will get an option to load a background image.
Once they are similar size you just pull the sstarter model splines to the same shape as the drawing. Location: Trondheim, NORWAY Also remember that boats at that time usually did get a small correction near the ends when they where lofted. I called seafarers museum yesterday and ask for a electronic copy but they didnt want to share with me. If you download Delftship you will be able to open the model and move it around as a 3D image.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. To try to give a fuller picture of what you can do with 3D Boat Design, here is a collection of screenshots from the program as we used it. This first set of four images shows the basic layout of views you’ll have of your design as you work on it and develop it. Naturally any changes you make to the design are reflected in all four views simultaneously and it is possible to switch on or off many of the visual tools that make this boat design software so easy to use.
Thousands and thousands of hobby sailors around the world have decided to give 3D Boat Design a trial.
Regardless of whether you want to build a boat yourself or just design boats as a hobby or business 3D Boat Design Software is the one tool you can start with today! The acclaimed 3D Boat Design Software is now available at the remarkably low price of just $49.95. Here's a remarkable collection of pre-drawn boat plans, ranging all the way from canoes and dinghies to houseboats and even submarines! All material provided on this web site is intended solely for informational or educational purposes. This website, as you’ve no doubt noticed, extols the virtues of designing your own boat with your own boat design software. So if anybody tells you that there’s nothing left to design in the world of boats, yachts catamarans, trimarans, proas, dinghies and kayaks then tell them to think again. With the 3-D boat design software that we’ve been recommending here all of this is achievable. Hull Design software I have designed a 4.9m cat on graph paper and I want to design it using CAD software. Location: Cudjoe Key Fl Tom, I went through this software thing for a number of years, and finally realized the only good boat design software is a large piece of paper and a sharp pencil!
Location: Denmark Personally, I also prefer to do it the old-fashioned way, but I must admit that it is by no means better than using a computer - only slower! Software for small craft engineering is available, but probably not for craft of the size you mentioned. The price of $150,000 that BillB mentioned is ridiculus, but you must be prepared to spend up to a couple of thousand, though (I should mention here that there are free- and shareware available, too - search for Hullform or PolyCad). Location: MX Hi Tom, Bill is correct up to some degree, be sure of what you are looking for (or what you want to achive with the software results wise), this softwares are usefull but they are not magic boxes that you ask and they respond, so one quick response could be prosurf and rhino, it has worked for me, and they do most of what i need, this is for hull shape and interior detailing, other good one is hullform and rhino, hullform the pro version is quite complete, it may be little bit harder to use IMO, and again this is for hull fairing and lofting, stability (initial with rhino and prosurf) and complete with hullform, other people will be able to give you their opinions.
Location: Perth, Western Australia I have to comment regarding Bill's statements about the high cost and complexity of modern CAD systems.
Similarly, Maxsurf was the system of choice of 7 out of 10 of the syndicates involved in the 2003 America's Cup. I do not disagree that designing with pen and paper is a perfectly valid way of creating a hull shape, but it is slow, difficult to calculate volumetric properties, and inherently inaccurate, requiring the additional step of full sized lofting to create accurate lines to build from.
Rather than imposing a fixed style on designs, I would argue that computer aided design methods have resulted in a greater degree of artistic freedom in the design of hulls and superstructures, particularly on luxury yachts that have gone from relatively simple shapes 20 years ago to a wide variety of more organic shapes, made possible by powerful surface modelling software. The pic below, a design by Brett Bakewell-White of New Zealand, is a good example, initially modelled in Maxsurf with further detailing and rendering in Vellum 3D. I must mention again, there is a BIG difference between Design software and Engineering software. Back to the reality of designing craft under 100 feet, which are considered small craft by all marine architects, sure one can figure out what size screws to use by eye, or state what thickness the bulkhead skins should be but I have never seen any Boat Styling software come close to doing this.
As far as pencil and paper and clay models, this has worked for a hundred years, and is 100% accurate.
On the contrary, Fastship has a relatively small number of integrated tools compared to Maxsurf. On the other hand, the Maxsurf suite consists of many well integrated applications using common files and a common user interface, all developed by my company, Formation Design Systems.
Like Fastship, we rely on programs such as ShipCam for downstream structural design and production, as this is an area that we consider to be outside our area of expertise, however Fastship has no equivalent to our preliminary structural design program, Workshop. I should also correct the impression you give that Maxsurf is for small craft and Fastship is for big ships. Location: Cudjoe Key Fl Andrew, now that is the reply Tom is looking for, among the rest of us! You may want to consider drawing and fairing your hull in a CAD program, not a hull design program. Location: Poland Hull fairing software (big ship) There were many discusions about fairing software but almost all projects on many software sites are yahts boats or simple ships. Location: MX You can fair a surface in rhino for the hull and other surface for the bulb and then try to connect them with a network surface, you can either use push and pull technique, or loft trough section cut form the model, I will try first to approximate a surface to what you have and model the bulb apart, using just push and pull to fair you surface. I have some experience in fairing hull curves for large ships, but I use Tribon M2 SP4 Initial Design for this. I know the method of fairing hull but first I have to solve multi mesh surface from IGS problem.
I was trying many methods in Rhino to create surface but they all are failed near bulb section. Location: Perth, Western Australia Maxsurf has no problems doing bulbs such as the one in your example (see attachment), however your major problem is the IGES file with the large number of patches. There is no simple way to convert the IGES file you have to a smaller number of surfaces and control points, you may as well create a dense table of offsets from the surfaces you have and start creating a new hull from scratch. Prefit is not suitable in this case as it more suited to simple fair surfaces and will not handle bulbous bows.

I have to add few technological details to this surface and then fair in that places where fairing will be needed - now it is quite good.
For ShipConstructor (and other soft) there are to many surfaces which generate curves consists many simple lines which begins and ends on small surfaces edges, also they have invalid 'sides' or 'ways' and correcting this manually will take few weeks.
NAPA constructs it's hulls from a large number of bicubic patches (effectively 4 x 4 control points) and as a result taking those surfaces into other programs can be difficut. Maxsurf on the other hand was intended to create designs from scratch, and as a result is structured in such a way as to use the minimum number of surface patches and control points. We have had a lot of cases where we have been sent IGES files from other CAD systems that we have recreated in Maxsurf. If you remove 99% of the data points that define a surface it will obviously be easier to fair but how well will the new surface reflect the original?
I've been wrestling with this dilemna in manufacturing for 20 years and I think one needs to have an awareness of the end function of the surface created and the knowledge and ability to select the appropriate point on the continuum between perfect reproduction of the original, usually inadequately resolved, datapoints, that often define an unusable surface and retaining the 3 points that are the minimum required to define the infinitely fair surface. All of this may be more important when bringing analog aerospace data into the digital world but I also believe it relevant to these discussions.
In the case I mentioned we were not removing 99% of the data points, we were doing a least squares fit to the existing data using a simpler surface. The Genetic Algorithm based fitting code we have is quite different to the standard skinning algorithm that is used in most CAD systems, in that, in addition to trying to minimise RMS error between the surface and the data points, it has control point net fairness, spacing and orthogonality as additional objectives. I've attached an example of the GA fitting output, you can see that the control point net is very regular and is spaced the way a good designer would have done.
I found the rule that ShipCAM generate base lines correctly when meshes from IGS files are in correct order in correct way.
But I think that it was too difficult to my first lesson and I have to choose easier hull shape at the beginning (boys put me in to the deep water - next time I have to ask my friend about another old hull surface and I will start with offsets and scratches not IGS multisurface). Location: Norway Sola Ship surface shape is quite special and some times with very special requairements.
Location: Destin, FL SolidWorks Center Console Hi Guys, I'm new to the forum and wanted to post a center console design I constructed in SolidWorks. Location: Australia I have been using solidworks and would NOT recommend it. Yes its a great modeller and you can do anything with it but every release for the last 5 years has been full of bugs. If you have been using 2009 Sp0, Sp1 or Sp2 you better upgrade to sp2.1 and go back and check all of your drawings.
Location: Sweden, Sodertalje Yes, a good rule is to not _ever_ touch work-related or important files with a Sp 0.x version of Solidworks! However, I find it very capable and trustable in most aspects, and the amount of bugs is not larger than in any other high-end software.
Surface modeling is not that hard once one master the spline-handling in SW and it does hulls well.
Guest62110524 Previous Member   so kite, could you double check a developed surface that came from say Rhino 4 or maxsurf, against SW? Location: Sweden, Sodertalje If I understand you correct - Nope, SW don't have develop-capability.
Rhino don't do them either from what I have seen, even though a Rhino-4 plug is claiming to do so.
Catia is more bang for the buck, and would do a nice package if it had Icem's capabilities.
One can add in Aerohydro's Multisurf or Surfaceworks to get some support for this, but I guess I never will do any other hulls than composite ones. Originally Posted by kite If I understand you correct - Nope, SW don't have develop-capability. Kite - you can trick solidworks (and the others) to flatten any shape that has single curvature. If the plate has a strain of say 10%, then even though workshop will show the same shape as Rhino and it all looks ok, if it has this much strain then it wont pull up properly. Location: Sweden, Sodertalje alidesigner - Oh, I didn't understand that it was 2D we were talking, I were referring to 3D shape, bends in both directions.
And I have been taking care of Rhino files a number of times, so I know that it can bring a lot of cost for the customers trusting in designers delivering production files from it. Workshop et al, just allows small yards even large yards to minimise their wastage and also produce plate in kit form. Originally Posted by alidesigner I have been using solidworks and would NOT recommend it. Location: Australia Dont judge software by the person presenting it, judge it by what it can and cant do.
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Designers used to draw curves that couldn't be built, but the builder would give the hull a little less curvature near the end in the lofting process. The 57-page manual that comes with the software walks you through all the views and the ways you can create them. Just a few hours’ work a week and you have the start of a lucrative home-based business. If your skills lie more in the practical sphere then this pack of boat plans might be just what you're looking for! Nothing on this site is intended to be a substitute for professional boat construction advice. And it may have crossed your mind that surely after three thousand years of boat development we have designed every possible hull shape that there is to design. There is always room for innovation and new ideas as these shots of the new LCS-2 USS Independence will testify.
I understand it will take a while to design it on CAD but I am deternined to design the catamaran using CAD software. And there is the added benefit that the software can do the calculations for you (hydrostatics, stability etc.) much, much faster than if done by hand. The only reason why I'm considering purchasing CAD software is because all the most successful companies in the world, whether it is to do with yachts or to do with cars are using Cad software.
Maxsurf costs as little as $700, yet was used to design the hull shape of Mirabella, the world's largest single masted yacht.
Each one of these syndicates could afford to choose whatever software they liked, and in many cases they were sponsored by major CAD vendors, yet they chose to pay full retail price for Maxsurf. As a result, few of todays professional designers still do things by hand, and more and more use computer systems such as Maxsurf, and are more than satisfied with the results. Maxsurf and the like, are fine programs for small craft, and making beautiful displays, BUT they don't ENGINEER the boat!

Remember you the draftsman are creating the exact cut lines this way, the computer is always off by some. Proteus, the authors of Fastship, rely on GHS (by Creative Systems) for their hydrostatics and stability, NavCad (by Hydrocomp) for their resistance and propulsion, the US Navy SMP program for their seakeeping analysis, and ShipCam (by Albacore Research) for detailed structural design.
Maxsurf is used by shipyards of all sizes, including installations in 5 of the biggest shipyards in Japan - Mitsui, Mitsubishi, Kawasaki, IHI and Sumitomo.
Admittedly, in Maxsurf you can set the tolerance to which curves are calculated, and the default is 0.2mm. User ID - guest, password - guest) and you can access our FAQ, manuals, and tutorials for all programs.
I still draw the basic shapes by hand and transfer them using points into Ashlar-Vellum Graphite ($995). I have a problem because I have to repair and fair hull surface of large container ship with complicated fore section with curved bulb.
In my opinion try to find some profesional software for large ships, or ask for offset table, because how to look this surface is not right and not accuracy.
I was cutting IGEs meshes by frames waterlines etc trying to connect it by loft or network surface function - results were ugly (I don't know where Rhino has brake line function similar to ShipCAM.
Unfortunately a lot of hulls done in general purpose CAD systems suffer from too many patches, too many control points, poor fairness and a large number of gaps between surfaces.
We do have a genetic algorithm based fitting function within Maxsurf that may be useful, if you send me an IGES file of NURBS surfaces I would be happy to try it for you. Of the designs shown in my previous posts all can be modelled in Maxsurf with between 5 and 10 surfaces. Obviously you have to make a value judgement as to how many control points to use, however this was fairly easy as we could see that the hull was actually very simple and was supposed to be extremely fair. This results in a net of control points that is very similar in layout to what a human designer would choose. But when I was saving this in ShipCAM format it generates many scratches in all directions at short distance ? it was useless. When you work with NURBS surfaces, you must decide in beginning how to split your hull into surfaces, like fore body, aft body, flat side, and flat bottom. My solution is to ?merge? some meshes in Rhino (FOB, FOS) and then import and correct some of them in ShipCAM to work with structure.
Is it possible to move smoothly from fairing for example waterlines to frames, from frames when working in Rhino? It is seriously sophisticated, their new hull model is a quantum leap above max-surf et al. Not saying this is always the case, but I make some cash out of the fact that it do happen. It also allows 'designers' to calculate the amount of plate require for a job without ever having to leave the office.
If you reside in an EU member state besides UK, import VAT on this purchase is not recoverable. This is powerful software yet simple enough for a novice to use and be successful with right out of the box.
Always consult a professional if you are in any doubt about the seaworthiness of any craft you design.
Software that they have actually developed from scratch in-house consists of Fastship and Maestro, their excellent structural analysis package. The enclosed photo is one of the most recent vessels constructed using Maxsurf and Workshop, one of the largest container ships afloat. If you think you can cut and build more accurately, you can always set the tolerance finer. The pictures from attach files are from one container carrier that I work , but I finished the surface and in this moment I work at shell plates and profiles and expansion shell plates. The Maxsurf hull was fair, while the original was not, and had no gaps between the surfaces, which was not true of the original. This is very different from most surface fitting programs which produce awful control point meshes that are totally unsuitable for further modification by a human designer.
Moreover, this decision is very important for future fairing process, quantity of control points and time consuming.
How to create correctly surface when ?Loft? function is going crazy near the bulb and ?Curve Network? don't want to create surface which I want to section in next direction - maybe there is another way ?
It is hard to imagine being able to get your hands on such powerful software at such an affordable price.
I have experience with computers but have only used very basic design software before for other reasons. So if these companies that have turnovers of ?500 million, then they must be doing something right! Any SHIP BUILDING software costs many thousands of dollars simply because in itself, it is huge. I am not using the software to design a 80ft yacht, I would be using it to design a 4.9m catamaran.
When it looks good on screen, I plot it out on D size paper and take a long hard look at it, just as I would by hand. Now I have to delete some lines because there are too many of them and generate new surface. Very often, I receive preliminary lines from different systems and my job is to make final production lines fairing. These 'newer' yards want an idiot proof construction to bridge the huge gap in their lack of understanding, they just want a simple jigsaw puzzle and complain when it doesn't fit, computer says so type of attitude! As such these 'designers' need some frame of reference that their hull shape and hence plate can be formed. Usually you are told just the opposite as the software developer tries to justify ridiculously overpriced software.
I calculate the areas of the hull sections using the 2D Analysis tool, then I input the areas, waterline halfbreadths and vertical centers of the areas into a spreadsheet to calculate the hydrostatics.
I just want a hull design software that will let me produce a professional hull shape with no major problems, but I don't want to spend thousands on the most high tech software out there. This works fine for small boats and you have the CAD program to detail the rest of the boat, which is really the bulk of the design anyway. It is important to choose what intersection curves to use for fair and after this to recreate other curves around the fair curves. Bottom left is called the bodyplan view and is essentially a view looking head on to the bow. In attachment, you can find some ideas ho to make NURBS surfaces fairing better and acceptable for the most different systems.

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