Airfoil Data
N64015A

The NACA 642-015A AIRFOIL is a thin 7.5% chord-thickness airfoil with a maximum camber of 3.7% at 40% chord, suited to high-speed UAVs, sailplane tip sections, and propeller blade design. At zero angle of attack the cambered geometry generates positive lift, giving an estimated zero-lift angle of -3.7°.

Thin airfoil theory predicts a stall angle near 11.8° and a peak lift-to-drag ratio around 56 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 N64015A typically compare it against profiles of similar thickness: MRC15, NACA 642-015 AIRFOIL, MH 27 11.99%, NACA 63-015A AIRFOIL, GOE 143 (MVA H.20) AIRFOIL. The NACA 64(4)-421 is another reference profile frequently considered alongside it.