Airfoil Data
E625
EPPLER 625 AIRFOIL
Wing Geometry Simulator
The EPPLER 625 AIRFOIL is a 9.3% chord-thickness airfoil with a maximum camber of 4.7% at 25% chord, suited to general-aviation and UAV wing design. At zero angle of attack the cambered geometry generates positive lift, giving an estimated zero-lift angle of -4.7°.
Thin airfoil theory predicts a stall angle near 11.7° and a peak lift-to-drag ratio around 61 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 E625 typically compare it against profiles of similar thickness: GOE 610-B MOD. AIRFOIL, TRAINER60, CLARK-Y 11.7% smoothed, EPPLER 340 AIRFOIL, EPPLER 502 AIRFOIL. The SIKORSKY SC1095R8 AIRFOIL is another reference profile frequently considered alongside it.
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Engineers evaluating the E625 frequently compare it against profiles with comparable geometric constraints. Below are the closest matches based on maximum thickness (9.3%) and max camber (4.7%).
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