Airfoil Data
MUE139

The MUE 139 is a 11.5% chord-thickness airfoil with a maximum camber of 5.7% 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 -5.7°.

Thin airfoil theory predicts a stall angle near 11.6° and a peak lift-to-drag ratio around 68 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.

Designers evaluating the MUE139 typically compare it against profiles of similar thickness: FX 62-K-153/20 AIRFOIL, AH 94-156, EPPLER 793 AIRFOIL, EPPLER 551 AIRFOIL, UNIVERSITY OF ILLINOIS UI-1720 AIRFOIL. The GOE 375 AIRFOIL is another reference profile frequently considered alongside it.