Airfoil Data
FX049915

The WORTMANN FX 049-915 AIRFOIL is a 13.2% chord-thickness airfoil with a maximum camber of 6.6% at 37% 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 -6.6°.

Thin airfoil theory predicts a stall angle near 11.2° and a peak lift-to-drag ratio around 70 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 FX049915 typically compare it against profiles of similar thickness: AH 93-W-257, GOE 16K AIRFOIL, GOE 624 AIRFOIL, DOUGLAS LA203A AIRFOIL, WORTMANN FX 057-816. The St. CYR 24 (Bartel 35-IIIC) is another reference profile frequently considered alongside it.