Airfoil Data
SG6040

The SG6040 is a 10.4% chord-thickness airfoil with a maximum camber of 5.2% at 35% chord, suited to general-aviation and UAV wing design. At zero angle of attack the cambered geometry generates positive lift, giving an estimated zero-lift angle of -5.2°.

Thin airfoil theory predicts a stall angle near 11.7° and a peak lift-to-drag ratio around 64 at typical UAV and light-aircraft Reynolds numbers — useful benchmarks before running a full XFOIL or NeuralFoil polar. The 10% thickness provides structural depth for main-spar placement without excessive drag penalty at moderate speeds.

Designers evaluating the SG6040 typically compare it against profiles of similar thickness: RAF-48 AIRFOIL, GOE 298 AIRFOIL, EPPLER 543 AIRFOIL, EPPLER 338 AIRFOIL, NACA6409 9%. The GOE 456 AIRFOIL is another reference profile frequently considered alongside it.