Airfoil Data
GOE256

The GOE 256 (JUNKERS E) AIRFOIL is a 12.6% chord-thickness airfoil with a maximum camber of 6.3% at 40% 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 -6.3°.

Thin airfoil theory predicts a stall angle near 11.4° and a peak lift-to-drag ratio around 70 at typical UAV and light-aircraft Reynolds numbers — useful benchmarks before running a full XFOIL or NeuralFoil polar. The 13% thickness provides structural depth for main-spar placement without excessive drag penalty at moderate speeds.

The GOE256 appears in the wing design of at least 7 documented aircraft, including designs from Junkers and Mitsubishi. 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 GOE256 typically compare it against profiles of similar thickness: ONERA HOR20 AIRFOIL, AH 93-W-174, GOE 505 AIRFOIL, GOE 776 AIRFOIL, GOE 681 AIRFOIL. The E214 (11.1%) is another reference profile frequently considered alongside it.