Airfoil Data
E226

The E226 (10.19%) is a thin 6.0% chord-thickness airfoil with a maximum camber of 3.0% at 33% chord, suited to high-speed UAVs, sailplane tip sections, and propeller blade design. At zero angle of attack the cambered geometry generates positive lift, giving an estimated zero-lift angle of -3.0°.

Thin airfoil theory predicts a stall angle near 11.9° and a peak lift-to-drag ratio around 52 at typical UAV and light-aircraft Reynolds numbers — useful benchmarks before running a full XFOIL or NeuralFoil polar. The slim profile minimises pressure drag at higher speeds but leaves limited spar depth for structural integration.

Designers evaluating the E226 typically compare it against profiles of similar thickness: AS6091 | Ananda-Selig | AIAA Paper 2018-0310, RG-12, NASA SC(2)-0612 AIRFOIL, S1012, NASA SC(2)-0412 AIRFOIL. The GOE 424 AIRFOIL is another reference profile frequently considered alongside it.