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3D wing from sections? (by Alex)
Hi
I'm modelling wings (form hydrofoils) for 3d printing.
I have wingsections (in 2d, e.g. NACA as a list of points) and need to scale and translate these 2d sections in 3D space and fit a surface across several sections.
Have a look at the pictures in this thread:
https://blenderartists.org/t/e...ils-possibly-via-script/685892

I tried with freecad and blender, but both are not really able to do what I want.
Blender seemed to work ok, but I finally found that it can not really boolen subtract complicated geometries (e.g. subtract the 3d wing from a cube to get a mould https://blenderartists.org/t/boolen-modifier-once-again/1101171/7).

To finally come to this conclusion took me a massive amount of time.
Solvespace looks interesting to me, but I can not judge if I would finally be able to do what I want with solvespace.

Could someone have a look at the pictures and give me a hint if i should give solvespace a try or not?

Thank you!
Alex
Sun May 6 2018, 05:27:11
(no subject) (by Andrew)
Have you looked at OpenScad, it might be better at doing what you want, and is able to import and subtract STLs from other solids. This does give you the option of using other tools to create the wing sections.
Sun May 6 2018, 05:50:58
(no subject) (by Paul)
The operation you're looking for is lofting, and solvespace doesn't have it at this time. It is possible to scale and rotate the wing section as you want, but there is no option to lay a skin over the result. I was thinking about making a small wind turbine and using solvespace to design ribs for the blades. The attached file defines a single rib that rotates as it's dragged down the length of a line in space. Scaling is also possible but difficult. It was just an arbitrary sketch, not a real foil. My intent was just to prove to myself this could be done and I could subtract holes for spars at any position along the blade. So some of this can be done with some difficulty, but making a single solid of it seems out of reach for now with solvespace.
Sun May 6 2018, 10:08:46, download attachment Blade1.slvs
(no subject) (by Alex)
ok. thank you; onpenScad was on the list, too, so i'll have a deeper look at it. The advantage would be that I could reuse my python-blender code to get the wing and to the subsequent processing therein.
Thanks again!
Alex
Sun May 6 2018, 13:25:44
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