It’s primarily intended for straight wings with a continuous profile, but it should be adaptable to tapered/swept wings too. These steps might seem simple, but it took about 3 weeks of experimentation to find a process that works. When these quadrants combine with the outer shell, it allows the slicer to treat the entire print as a continuous external perimeter line using “ vase mode“.
The ribs are first treated as a separate body in CAD and split into four quadrants. A cylinder runs along the core of the wing to fit a carbon fiber wing spar. After importing the profile into Fusion 360, he created internal ribs in a diagonal grid pattern, with lightening holes running along the length of the wing. He wanted a wing that would allow a smooth transition from hover to forward flight, and used the Airfoil Tools website to find and download the appropriate airfoil profile. To get around this, he designed the wings and their internal ribs to be printed in one continuously extruded line. It was printed with lightweight PLA, which can ooze badly when it stops extruding. used the process demonstrated in the video after the break to create the wing for his latest VTOL RC aircraft. If you’re moving beyond foam board wings, 3D printing is an excellent way to create an accurate airfoil, and provides us with an excellent guide to modeling wing sections for easy printing. The exact airfoil shape of a wing has a massive effect on the performance and efficiency of an aircraft and will be selected based on the intended flight envelope.
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