Airfoil Data
FX79W660A

The FX 79-W-660A is a thick 34.6% chord-thickness airfoil with a maximum camber of 17.3% at 43% 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 -17.3°.

Thin airfoil theory predicts a stall angle near 8.0° and a peak lift-to-drag ratio around 96 at typical UAV and light-aircraft Reynolds numbers — useful benchmarks before running a full XFOIL or NeuralFoil polar. The 35% thickness provides structural depth for main-spar placement without excessive drag penalty at moderate speeds.

Designers evaluating the FX79W660A typically compare it against profiles of similar thickness: AH 93-W-480B, GOE 570 AIRFOIL, FX 79-W-470A, Marsden, GOE 561 AIRFOIL. The FX 79-L-100 is another reference profile frequently considered alongside it.