Airfoil Data
SC20406

The NASA SC(2)-0406 AIRFOIL is a thin 3.0% chord-thickness airfoil with a maximum camber of 1.5% at 41% chord, suited to high-speed UAVs, sailplane tip sections, and propeller blade design. At zero angle of attack the cambered geometry generates positive lift, giving an estimated zero-lift angle of -1.5°.

Thin airfoil theory predicts a stall angle near 12.0° and a peak lift-to-drag ratio around 44 at typical UAV and light-aircraft Reynolds numbers — useful benchmarks before running a full XFOIL or NeuralFoil polar. The slim profile minimises pressure drag at higher speeds but leaves limited spar depth for structural integration.

Designers evaluating the SC20406 typically compare it against profiles of similar thickness: S1010 HPV airfoil, NACA 0006, NASA SC(2)-0706 AIRFOIL, NASA SC(2)-0606 AIRFOIL, NASA SC(2)-1006 AIRFOIL. The GOE 422 AIRFOIL is another reference profile frequently considered alongside it.