Airfoil Data
PSU-90-125WL

The PSU-90-125WL is a 8.6% chord-thickness airfoil with a maximum camber of 4.3% at 35% 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 -4.3°.

Thin airfoil theory predicts a stall angle near 11.8° and a peak lift-to-drag ratio around 59 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 PSU-90-125WL typically compare it against profiles of similar thickness: NACA 66(2)-215, NACA 67,1-215, NACA 63(2)-215 MOD B, E193 (10.22%), LOCKHEED L-188 TIP AIRFOIL. The MH 106 13.07% is another reference profile frequently considered alongside it.