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Old 30-04-2024, 06:13   #1
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Making yacht drawings in CAD

I'd eventually like to have a 3D model of the boat I'm trying to buy. Initially, just hull and bulkheads, but eventually deck, rig and other things in the boat that take up space.

The hull shape seems hardest of my initial requirements. Any thoughts on 3D software that can make a decent model of a boat from stem to stern? So far, OpenSCAD is what I'm playing with as I found a hull builder program for it.
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Old 30-04-2024, 08:35   #2
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Re: Making yacht drawings in CAD

You could try FreeCAD or Rhino (student). Is this just a model for viewing or are you doing design, flow calcs etc.
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Old 30-04-2024, 18:14   #3
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Re: Making yacht drawings in CAD

Just viewing. Since I posted, I've been trying OpenSCAD. Too little experience with it so far to tell it it's what I need, though I like the concept.
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Old 30-04-2024, 18:28   #4
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Re: Making yacht drawings in CAD

I used deltacad for 2d. $45 I think I bought when it was 20 20 years ago. It's very easy to learn

Progecad for 3D $250. I just. Bought it I plan to do 3d of the boat some day. I posted drawings of my gin pole winch. Platform drawn with it. It works like AutoCAD which is a plus.

Good luck tom Bodine
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Old 30-04-2024, 19:26   #5
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Re: Making yacht drawings in CAD

I would be curious to see your OpenSCAD results and hear about the hull generator script.

Go to https://www.boatdesign.net/forums/design-software/ and look for threads by pafurijaz, who demonstrates many kinds of software that can be used for boat modeling.

Here is one that has a hull from Free!ship exported via IGES into Rhino3D and was trimmed to match intended sheer and transom. The hull work takes minutes, the deck and such has taken hours and I am still a fair ways off. I am a newer Rhino user. The keel was already in Fusion from another project and easy to import back into Rhino.
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Old 04-05-2024, 12:12   #6
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Re: Making yacht drawings in CAD

I found it here: https://www.thingiverse.com/thing:3707731
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Old 04-05-2024, 13:22   #7
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Re: Making yacht drawings in CAD

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Thanks for the link Bill.
I ran the file as-is, option 2, through OpenSCAD and got this:
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Old 04-05-2024, 14:21   #8
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Re: Making yacht drawings in CAD

You can 3D scan your boat & make a point cloud file which can then be cleaned up & manipulated as you like. Hull & deck. Iphone 15 has lidar, making it pretty accurate. Dot3D and Modelar in the Apple ecosystem are available. No clue on Android.
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Old 19-05-2024, 07:16   #9
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Re: Making yacht drawings in CAD

I have been down this rabbit hole.

I have had 4 scans done of my boat. The 1st was done on a high end Faro scanner. They did the whole hull/deck/most of the interior. I received a point cloud back from them.

Then I did another Faro scan about 8 or 9 months later - boat was stripped down by time we got to the 2nd scan - so now have 2 point clouds of the boat - before it was touched and after we stripped her down to bare hull. Got another point cloud from them.

Later on decided to scan the engine bay without the engine installed - we got very detailed 3D scans of the engine bay - which we will never get the chance to scan again, Then we placed the engine back in and scanned the engine sitting in the engine bay. These scans were done with a hand held Einscan scanner. It takes a long time to scan with the hand held einscan because one has to place "dots" all over the area to be scanned so as to bee able to register it all together. Itss amzing how long these dots take to stick on then take off after the scan.

I will be working on the scans later in the week so will post some screen shots of the work we have done 3D scanning.

The only real issue is the area where I am doing my refit is still stuck in 1971 and no one locally works with CAD or 3D, so there is that.
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Old 19-05-2024, 08:45   #10
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Re: Making yacht drawings in CAD

I used Rhinocerus (student version) when designing my boat and found it invaluable.
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Old 19-05-2024, 10:56   #11
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Re: Making yacht drawings in CAD

I have been playing with Blender to learn it. You can import the line drawings in 3d space, trace them, and then apply the surface. It is a lot of work, but the results are outstanding. Here is an early attempt of me, as a beginner with the software, modeling my Morgan 382.

https://youtu.be/MByrLuEqDFY?feature=shared
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Old 24-05-2024, 01:53   #12
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Re: Making yacht drawings in CAD



This is a screen grab of the scan that was loaded into the scanners software - so the resolution is low.

However if you zoom in a bit you can see the sort of detail we got on the engine. I also had the area forward of the engine bay, the keel box area, scanned.

The purpose of this is so I can figure out what high power output alternators (at 48v) can fit at the front or the rear of the engine. Also I want to design some sheet metal duct work that will go from the rear lazerette into the engine bay - I need to get a high flow of cool air from outside into the engine bay and particularly to get a cool flow of air over the HPO alternator.

The issue I have is that where I am doing my rebuild I am too far away from contractors to come out to the boat to design and measure the engine bay for the above tasks - so by having a very detailed high res scan of the engine bay both with and without the engine in the engine bay I can get the relevant ppl to design the duct work needed. Thats the theory anyway. I have found that where I am doing the rebuild the area is in a time warp and has never left 1971 - so no one works with 3D or scans or CAD. With the scans now done I can send them off to ppl who do work in CAD to get everything I want, done.
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Old 24-05-2024, 02:09   #13
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Re: Making yacht drawings in CAD

I recently got a good deal on a Creality CR-Scan Ferret Pro, a "consumer market" 3d-scanner for <400€, and had pretty good results scanning the hull of our 23ft pocket cruiser.

When scanning "large scale" objects, the resulting mesh file after postprocessing is accurate to about 1-2mm, which is definitely good enough for me. Takes quite a bit of time and the right weather conditions (overcast sky is best, as it won't work properly in full sun) to scan parts of the hull and stitch them together, but the result is really worth it.

Can't show images of the scan right now, the laptop I did the scanning with is on the other side of town in my desk..
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Old 24-05-2024, 02:12   #14
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Re: Making yacht drawings in CAD

Quote:
Originally Posted by Jim Jones View Post


This is a screen grab of the scan that was loaded into the scanners software - so the resolution is low.

However if you zoom in a bit you can see the sort of detail we got on the engine. I also had the area forward of the engine bay, the keel box area, scanned.

The purpose of this is so I can figure out what high power output alternators (at 48v) can fit at the front or the rear of the engine. Also I want to design some sheet metal duct work that will go from the rear lazerette into the engine bay - I need to get a high flow of cool air from outside into the engine bay and particularly to get a cool flow of air over the HPO alternator.

The issue I have is that where I am doing my rebuild I am too far away from contractors to come out to the boat to design and measure the engine bay for the above tasks - so by having a very detailed high res scan of the engine bay both with and without the engine in the engine bay I can get the relevant ppl to design the duct work needed. Thats the theory anyway. I have found that where I am doing the rebuild the area is in a time warp and has never left 1971 - so no one works with 3D or scans or CAD. With the scans now done I can send them off to ppl who do work in CAD to get everything I want, done.
Jim, I work with a laser doing room layouts every day but we do not do point clouds but rather use planes for the walls and other surfaces. I am not sure if something like this is in our future or not.

Can you tell me how long a scan like this took to do and how much it cost?

Thanks, Dan
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Old 24-05-2024, 02:41   #15
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Re: Making yacht drawings in CAD

This https://youtu.be/v2Jq_590kb0 is a low res video (hosted on YouTube because of file size even though its low res).

This video shows both a Leica BLK2GO scan AND the Einscan HX hand held scanner. The blue scans are the Einscan HX and the rest are from the BLK2GO scanner.

**EDIT** Sorry for the very low res - Youtube made it even lower res! I will try to get this video in a high res version so you can actually see a lot more - however this does give you an over view. I will take some screen grabs and post these here so you can get a better idea of how the scan data looks.
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