Best way to create bulwarks etc.

[Sean Campbell]

Hey all, I’m just new to using Delftship free and have been tooling around with a couple of projects–mainly I’m a scale ship modeler and have found Delftship really easy to use to help develop full lines plans for ship models where I don’t have a complete set of lines etc. of the original ship to work from. I’m even hoping to get to a point where I can do most of the hard work in Delftship and then send it to a CNC or Rapid Prototyping shop to develop masters from the Deltfship plans.

My question is less about how to use the software, and more the best way to do something. For several ship models I need to add bulwarks and fashion plates, and in one case a deck overhang. What would be the best way to model these in Delftship? Obviously they need to have some depth, but I’m having trouble extruding a 1″ plate in Delftship without screwing up the curves and leak points etc.

Any tips and tricks you could provide would be of great help.

Thanks!

Sean

[michael f. berg]

Hi, Sean:

I don’t know if it is the best way, but try the following:

Shift the points of the controlnet so that you can CREASE the edges of the planned bulkwark on your hull. It might be helpful to tools->markers->import from a handwritten text file (see manual!).
Display inner edges, select the inner edges of the planned bulkwark (ctrl-select), add a new layer and move the faces of the planned bulkwark to the new layer. Export the new layer as part, f.i. as “bulkwark.part”. Edit undo every thing so your hull is in order again. Save and close your project for a moment.
With open and cancel produce an empty working space, and into this import your recently created “bulkwark.part”.
Now f.i. your bulkwark shall protrude say 2 inches from the hull in all directions.
The length of your hull is maybe 100 feet equals 1200 inch. The half beam of your hull is 12 feet equals 144 inch. Now scale your skinny bulkwark for x direction by a factor of 1 + 2×2 inch/1200 inch (= 1.0033). Scale the bulkwark in y direction by a factor of 1+ 2 inch/144 inch (=1.0139). Because in scaling the zero point is fixed you have to move back now your bulkwark by 2 inches.
Edge extrude the bulkwark inward by y = -2 inch.
This scaling procedure is not quite exact actually, but it works better than free hand adjusting…
Export it again as part “bulkwark.part”.
Close the working space and open again your old project. Import “bulkwark.part”,
it comes to a new layer. Do exclude it from the hydrodynamics and give it a suitable name and colour…

Kind regards michaelf

[Author]

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