How to slice this wing so it has a smooth infill like perimeters I have this wing design that I want to print:



You can notice that its walls have a thickness, which is 1.0&nbsp;mm.
I want to print it so that the perimeters are inside that thickness.
Here is the wing sliced with 1 perimeter and 0% infill:



You can notice a gap between the perimeters. That gap is what I want filled and not the perimeters in the image. With 0 perimeters and 100% infill I got this zig-zagged line:



I want the gap to be filled; but, I don't want it to be zig-zagged like in the image. I want it to be smooth like the perimeters in the other image.

Basically I want a smooth infill that goes around the curves just like the perimeters. The reason why I don't want to print both the perimeters and the infill is because I want to save as much weight a possible as this is a wing of a model plane that must fly, so the lighter it is the more efficient it will be.

Any ideas how I can slice this?

The images are screenshots in Slic3r, but I can use Cura as well.
This is just a test slice. The wing model is not finished yet.
I found a great solution!

In Cura, there is a setting under Shell called Horizontal Expansion. What this does is it controls the distance between the two perimeters. A negative value in this field will make them come closer together, thus removing the gap between them.



I found that -0.1 is the perfect value for 1 mm thick walls like the ones in my design. So I set it to -0.1, then set the infill to 100% because in some spots the thickness is a little bit more than 1 mm, so the infill closes the gaps in those places. Here is the result:



You can see the perimeters are now sticking to each other and there is no gap between them. The result estimated weight is 71 g, which is a quite good reduction from the estimated 92 g when not using horizontal expansion.