Airfoil Data
E330
EPPLER 330 AIRFOIL
Wing Geometry Simulator
The EPPLER 330 AIRFOIL is a thin 7.5% chord-thickness airfoil with a maximum camber of 3.8% at 26% 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 -3.8°.
Thin airfoil theory predicts a stall angle near 11.8° and a peak lift-to-drag ratio around 56 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 E330 typically compare it against profiles of similar thickness: GOE 121 (MVA H.1) AIRFOIL, MH 106 13.07%, LWK 80-150/K25, WASP (smoothed), GOE 403 AIRFOIL. The HQ 2.5/12 AIRFOIL is another reference profile frequently considered alongside it.
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Related Airfoils
Engineers evaluating the E330 frequently compare it against profiles with comparable geometric constraints. Below are the closest matches based on maximum thickness (7.5%) and max camber (3.8%).
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