Airfoil Data
E748

The EPPLER 748 AIRFOIL is a 13.5% chord-thickness airfoil with a maximum camber of 6.8% at 32% 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 -6.8°.

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 14% thickness provides structural depth for main-spar placement without excessive drag penalty at moderate speeds.

Designers evaluating the E748 typically compare it against profiles of similar thickness: NACA 23024, St. CYR 24 (Bartel 35-IIIC), GOE 8K AIRFOIL, GOE 573 AIRFOIL, GOE 423 AIRFOIL. The GOE 456 AIRFOIL is another reference profile frequently considered alongside it.