Airfoil Data
GOE679

The GOE 679 AIRFOIL is a 13.5% chord-thickness airfoil with a maximum camber of 6.7% at 29% chord, suited to high-lift UAV wings, RC sailplanes, and low-Reynolds-number slow-flyers. At zero angle of attack the cambered geometry generates positive lift, giving an estimated zero-lift angle of -6.7°.

Thin airfoil theory predicts a stall angle near 11.1° and a peak lift-to-drag ratio around 71 at typical UAV and light-aircraft Reynolds numbers — useful benchmarks before running a full XFOIL or NeuralFoil polar. The 13% thickness provides structural depth for main-spar placement without excessive drag penalty at moderate speeds.

Designers evaluating the GOE679 typically compare it against profiles of similar thickness: NACA 65(4)-421 a=0.5, FX 76-MP-120, AH 95-160, GOE 628 AIRFOIL, FX S 02-196 AIRFOIL. The EPPLER 398 AIRFOIL is another reference profile frequently considered alongside it.