Adding a long strand of Filament in z direction is what the Author of this article tried. By injecting molten filament into a long channel in the infill.
What i meant that the z-direction does not need to be MORE stable than the other directions.
Adding a long strand of filament in the z-direction in the infill (close to the geometric center of the print) might make the print more resistant to stretching but not necessarily bending.
Carbon rods don't bend but filament does. The wing would break apart at the seams event if it had channels of filament along side its z-axis. It would still be more stable, but not as much as one might think.
Walls give a print most of its strength by a huge margin. And interlocking the walls in z-direction would have a proprietorially larger impact.
What i meant that the z-direction does not need to be MORE stable than the other directions.
Adding a long strand of filament in the z-direction in the infill (close to the geometric center of the print) might make the print more resistant to stretching but not necessarily bending.
Carbon rods don't bend but filament does. The wing would break apart at the seams event if it had channels of filament along side its z-axis. It would still be more stable, but not as much as one might think.
Walls give a print most of its strength by a huge margin. And interlocking the walls in z-direction would have a proprietorially larger impact.