Airfoil Data
FX77W153

The WORTMANN FX 77-W-153 AIRFOIL is a 12.1% chord-thickness airfoil with a maximum camber of 6.1% at 28% 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 -6.1°.

Thin airfoil theory predicts a stall angle near 11.6° and a peak lift-to-drag ratio around 69 at typical UAV and light-aircraft Reynolds numbers — useful benchmarks before running a full XFOIL or NeuralFoil polar. The 12% thickness provides structural depth for main-spar placement without excessive drag penalty at moderate speeds.

Designers evaluating the FX77W153 typically compare it against profiles of similar thickness: GOE 621 AIRFOIL, GOE 612 AIRFOIL, GOE 332 (PFALZ 61) AIRFOIL, EPPLER 399 AIRFOIL, S1210 12%. The FX 77-W-121 is another reference profile frequently considered alongside it.