Airfoil Data
FX84W175

The FX 84-W-175 is a 13.1% chord-thickness airfoil with a maximum camber of 6.6% at 37% 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 -6.6°.

Thin airfoil theory predicts a stall angle near 11.2° 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.

Designers evaluating the FX84W175 typically compare it against profiles of similar thickness: GOE 420 AIRFOIL, FX 75-193, GOE 16K AIRFOIL, WORTMANN FX 66-17AII-182 AIRFOIL (AS TESTED AT NASA), GOE 225 (MVA H.35) AIRFOIL. The FX 84-W-150 is another reference profile frequently considered alongside it.