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I’m really fascinated of this plane and started to print one myself.

But I have some issues with the infill. Some of the vertical bars in the wing parts aren’t printed properly and break when you squeeze the finished wing slightly.
I hope you understand what I mean.

I’m using Cura and a Anet A8.
The settings are:

Layer: 0.2mm
Infill: 3%
Speed wall/infill: 25m/s
Material: PLA
Heatbed Temp: 60°C
Hotend Temp: 215°C

I thought about printing even slower and with higher hotend temperature.
Do you think that’s a proper way to get more stable infills?