Airfoil Data
AH81K144

The AH 81-K-144/17 is a 11.4% chord-thickness airfoil with a maximum camber of 5.7% at 43% 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 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 AH81K144 appears in the wing design of at least 1 documented aircraft — notably by Akaflieg. Its proven track record across canard designs makes it one of the more field-validated profiles in the UIUC database.

Designers evaluating the AH81K144 typically compare it against profiles of similar thickness: GOE 553 AIRFOIL, EPPLER 553 AIRFOIL, GOE 549 AIRFOIL, GOE 758 AIRFOIL, EPPLER 49 AIRFOIL. The GOE 417A (GEW. PLATTE) AIRFOIL is another reference profile frequently considered alongside it.