Airfoil Data
GOE426

The GOE 426 AIRFOIL is a 11.2% chord-thickness airfoil with a maximum camber of 5.6% at 30% 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 -5.6°.

Thin airfoil theory predicts a stall angle near 11.6° and a peak lift-to-drag ratio around 67 at typical UAV and light-aircraft Reynolds numbers — useful benchmarks before running a full XFOIL or NeuralFoil polar. The 11% thickness provides structural depth for main-spar placement without excessive drag penalty at moderate speeds.

The GOE426 appears in the wing design of at least 7 documented aircraft, including designs from Slingsby and Kirby. Its proven track record across conventional and rotorcraft designs makes it one of the more field-validated profiles in the UIUC database.

Designers evaluating the GOE426 typically compare it against profiles of similar thickness: EPPLER E1212MOD AIRFOIL, EPPLER 343 AIRFOIL, AH 82-150 F, EPPLER 549 AIRFOIL, DEFIANT CANARD BL110 AIRFOIL. The EPPLER 331 AIRFOIL is another reference profile frequently considered alongside it.