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Airframes · 5 min read

Foam, balsa, composite or printed?

Every way of building an RC airframe trades weight, strength, cost and time. The physics is the same for all of them, so every LayerWings tool works with any build.

BuildTypical wing loadingStrengthCostRepair
EPO / EPP foam30–55 g/dm²Soft, bends in crashesLowGlue and tape, easy
Balsa + film covering25–50 g/dm²Light and stiff, cracksMediumPatch and re-cover
Built-up, fabric covered35–70 g/dm²Strong, scale lookMedium–highRe-cover a bay
3D-printed (LW-PLA)40–60 g/dm²Stiff shells, brittle in coldLow: files + filamentReprint the part
Fiberglass composite50–90 g/dm²Very toughHigh, needs mouldsGlass cloth + epoxy
Carbon composite40–95 g/dm²Stiffest per gramHighestSpecialist work

Typical ranges for sport, FPV and UAV airframes. Gliders run lighter, payload UAVs heavier.

Which one for you?

Foam is the best way to learn: it survives bad landings. Balsa and fabric give the lightest wings for slow, scale and vintage flying. 3D printing lets you build a complex shape at home with no moulds. Fiberglass and carbon are for long-range UAVs, fast planes and gliders where stiffness and payload matter most.

Same tools for every build

The CG, wing loading, flight time and battery tools only need sizes and weights. Enter your numbers whatever your plane is made of. The wing loading tool also tells you whether your weight is normal for your build type.

Check your wing loading