Hi, I'm new to the idea of 3D in general but I see it's power. I've been playing with Blender 2.6 and know just a little and not enough yet. Anyway, I want to print airfoils and a spar to hold them. I took an airfoil from Xfoil and used it as a background image, then followed it with a Nurbs path and converted it to a mesh. Then, I used fill and F-gon to make it solid.
What I want to do is figure out how to "cut" a slot for a spar or even how to cut some lightening holes. If I can do that, then I would build a spar to fit and curve it for dihedral like on the easystar, and the printed ribs would snap in place.
I submitted that rib shape to shapeways just to see what they would charge. What a ripoff. They wanted $32.00 for it and didnt even have a way for me to verify dimensions.
My plan was to print some ribs and then fill with 2 part foam, sand to shape and cover with fiberglass. It looks like it's back to kinkos and a copy machine as my wing building method.
I am a fairly experienced Blender user, and I have been trying to design and print a plane that is 3D printed, but shapeways keeps rejecting my models based on wall thinness. As it turns out, the thickness requirements are much more complicated than what are posted on their website. Anyway, it would be fun if I can get it to work. It is expensive, but it would be an interesting proof-of-concept.
Here is a quick render of a wing section that is designed to fit over a carbon fiber tube spar. I would like to integrate ailerons and flaps into the design, and so there is also an image showing a design exercise of trying to achieve this. (Please ignore geometry problems)
If there is someone out there who is interested in a project like this, please let me know as it would be helpful to team up on something this complex.
Yeah, I tried too on Shapeways. Basically, the problem is that with the air foil shape the trailing edge always gets to thin for them. If you attach the stl or blender files, I can attempt a print on the TOM. The Replicator software is much more forgiving with thin walls.
Yeah, that's beautiful. I submitted a wing tip that was just a mesh converted from the beziers and they didnt have a problem with it. I saw the price and started boring holes in it by removing faces. When I submitted that, they rejected it. I then went back and used the solify modifier and they liked it. The price dropped 90%.
On Shapeways, hollow objects are cheaper, of course. Also, the larger the object the lower per volume price is, up to a point.
I called their bluff to see if they will actually print my design. My plan at this point is use it to make a mold since I expect it would be too fragile to fly. I'll fill it and then give it an epoxy skin for molding. Molds arent cheap either, but I need it to complete my design and go with the pod mold I already have.
Oops, maybe this will help. I attached the background image in case you need it. Also, it's actually 2 nurbs curves, one for the top and one for the bottom of the foil.