Can you help me with this model
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I have a model boat I spent hour upon hour on, and I just cant get it quit right. My intention is when all is said and done, unfold the model so that I can make life size cutouts in plywood. My problem is in the surfaces. I cant get them right so they will unfold properly. I am hoping someone with more experience can assist me with this.
I have not uploaded the model yet as I am not sure where to upload it. Perhaps by the time someone answers this I will have accomplished that. -
If your model isn't too large upload it right here.
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@krisidious said:
If your model isn't too large upload it right here.
well I managed to upload it to 3d warehouse under the name fishing cat. I dont see an option for attaching file here, just pictures.
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When you post see under Submit button: Upload attachment.
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You're probably going to have to be a little more precise because I don't think you're building that out of plywood.
http://sketchup.google.com/3dwarehouse/details?mid=c54e5bc706855a5efc4c78b4701b2fab
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It would help if you had drawn the model better. Divide the hull into assemblies using components. Leave out details like that star thing on the back of the cabin, the aerials and the stuff on the roof. Also delete the coplanar edges.
It could probably be built out of plywood using the stitch and glue method. I don't think I'd set foot on that slab-sided thing, though. Looks like it would be difficult to maneuver in a breeze with all that windage. Have you run any hydrodynamic calculations on it? What do you expect for displacement? How did you determine the waterline? What are you going to power it with?
Have you thought about the structure under the skin? To get any strength you're going to need a heck of a framework. If you put some curves in it the skin will be able to carry much of the load and you'll be able to reduce the framework inside.
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final draft final.skpmm that was the wrong model, here is the right one
http://sketchup.google.com/3dwarehouse/details?mid=e708ec80c30086c36dd8881532b5a3d9&prevstart=0
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That one is going to be harder because you haven't drawn it so it can be unfolded. As I wrote before, you need to break it up into assemblies. The sponsons, for example should be separate from the deck.
It would also help if you paid attention to face orientation.
Note that due to the relatively large facets you've got, the unfolded shape won't make accurate patterns for the panels.
If I were trying to do what you are, I would use a program designed for the purpose. Gregg Carlson's Hulls program would take the sponson design and develop the patterns for you. it would even give you a table of points you can use to lay out the panels and the frames.
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@dave r said:
That one is going to be harder because you haven't drawn it so it can be unfolded. As I wrote before, you need to break it up into assemblies. The sponsons, for example should be separate from the deck.
It would also help if you paid attention to face orientation.
Note that due to the relatively large facets you've got, the unfolded shape won't make accurate patterns for the panels.
If I were trying to do what you are, I would use a program designed for the purpose. Gregg Carlson's Hulls program would take the sponson design and develop the patterns for you. it would even give you a table of points you can use to lay out the panels and the frames.
I have tried hulls, and could not get it to do what I was trying to do with sketchup. The interface didnt make sense to me. I understand about breaking up into separate assemblies.
I will see about doing that. Face orientation is one of the areas I have problems with, which is why I was asking for help in the first place. -
As for face orientation, you just need to stay on top of keeping the blue faces in. Painting your model with colors and textures doesn't help or fix it. Select the blue faces, right click and choose Reverse Faces. If you take care of the face orientation as you go, it's really not a big deal.
What is it that you couldn't get Hulls to do? If I remember correctly there's already some cataran hull in the sample library you could use as a starting point. I'd probably just draw one sponson, though and use half the overall intended displacement to work out the waterlines.
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@dave r said:
As for face orientation, you just need to stay on top of keeping the blue faces in. Painting your model with colors and textures doesn't help or fix it. Select the blue faces, right click and choose Reverse Faces. If you take care of the face orientation as you go, it's really not a big deal.
What is it that you couldn't get Hulls to do? If I remember correctly there's already some cataran hull in the sample library you could use as a starting point. I'd probably just draw one sponson, though and use half the overall intended displacement to work out the waterlines.
I redownloaded hulls this afternoon, it did not seem any more user friendly before.
I have no idea what values to put in those boxes to make it do what I want it to do. I found no sample files of any kind anywhere, of cat or any other style. -
Did you look at the tutorial here? Did you look at the PDF file included in the download?
You really didn't find any sample files? I just downloaded it and installed it. It came with a whole mess of samples. Every one of the .hul files is a sample hull.
The boxes with numbers in them show the distances of the bulkheads or stations from the bow and the number 4 indicates the number of chines for that hull. You can click on each of those windows with the different views to work on the shape of the hull. then you can drag points around as needed.
If you really want to try this in SketchUp instead, redraw the hulls accurately and with precision. You only need to draw one and for the most part, only the half-breadths. Make the required triangles small enough to get some sort of useful precision out of the model. then when it comes time to unfold it, go at it With Jim Foltz's Unfold plugin or one of the others out there.
If you designed it in Hulls, you could export a DXF file which you could then import into SketchUp.
You could also look at Delftship or Free!Ship.
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If he isn't developing a file for CNC he may as well model it in SU.
although...delftship would give him a cutsheet plywood layout as I recall
and the stl made by delftship is a lot cleaner.
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ahh I did not see all that, and thanks for the info.
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