Customizable RC Wing Rib-and-Spar Structure (NACA 4415)

A built-up RC wing skeleton you can resize in one edit: 13 laser-style NACA 4415 ribs on two spar tubes, root and tip caps, a servo box, and an optional translucent skin - all generated with native TrueGeometry Playground commands, no booleans, no unions.

**Customize it:** the full recipe (wing_recipe.txt, in Other files) is variable-first. Change the station array and you change the span and rib count. Swap the profile coordinates and it becomes any NACA 4-digit section. Presets in the recipe and in the guide PDF: park flyer 600 mm (default), trainer 900 mm, micro 400 mm. Paste the recipe into the Playground Script panel, click Run (never "Clean & Run"), export STL.

**Blog article (full recipe, technique, presets):** https://blog.truegeometry.com/0_0_0_0/blogs/post-c1393e0d.html

**Playground:** https://www.truegeometry.com/CoreWebGLTG/KBEAgentHTTP.html

**Honest notes:** fresh design, not yet test-printed - please post a Make if you print it. Original generic sport/trainer wing, not a replica of any aircraft. SkinWing is a visualization solid; for a real build, cover the skeleton with film. The assembly STL is separate overlapping shells by design (fit check) - slice the parts individually for a buildable wing. Designed slip fits: main spar 0.2 mm, rear spar 0.18 mm. Main spar protrudes 25 mm past the tip as a joiner for a second panel. Verified: a fresh run of the recipe produces an 8,172-triangle assembly with identical bounds every time.

**Printing:** ribs LW-PLA or PLA, 0.2 mm, lying flat. Spars: print standing, or use 10 mm / 6 mm carbon tube. Caps PLA.

AI-assisted design. CC BY-NC 4.0.