Airfoil Data
FX66S196
FX 66-S-196 AIRFOIL
Wing Geometry Simulator
The FX 66-S-196 AIRFOIL is a 13.6% chord-thickness airfoil with a maximum camber of 6.8% at 40% 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 -6.8°.
Thin airfoil theory predicts a stall angle near 11.1° and a peak lift-to-drag ratio around 71 at typical UAV and light-aircraft Reynolds numbers — useful benchmarks before running a full XFOIL or NeuralFoil polar. The 14% thickness provides structural depth for main-spar placement without excessive drag penalty at moderate speeds.
The FX66S196 appears in the wing design of at least 5 documented aircraft, including designs from Akaflieg and Rolladen. Its proven track record across conventional and rotorcraft designs makes it one of the more field-validated profiles in the UIUC database.
Designers evaluating the FX66S196 typically compare it against profiles of similar thickness: FX 67-K-170/17 AIRFOIL, GOE 8K AIRFOIL, St. CYR 24 (Bartel 35-IIIC), NACA 23024, EPPLER 748 AIRFOIL. The FX 66-H-80 is another reference profile frequently considered alongside it.
Aircraft Using the FX66S196 Airfoil
Akaflieg Darmstadt D-37 | Akaflieg | Wortmann FX 66-S-196 | Constant |
Akaflieg Stuttgart FS-25 Cuervo | Akaflieg | Wortmann FX 66-S-196/184/168 | Wortmann FX 66-S-147/60-126 |
Kortenbach & Rauh Kora I | Kortenbach | Wortmann FX 66-S-196 | Wortmann FX 66-S-161 |
Rolladen Schneider LS-1c | Rolladen | Wortmann FX 66-S-196 mod | Constant |
Rolladen Schneider LSD-Omith | Rolladen | Wortmann FX 66-S-196 | Constant |
Wing lofting: 2 of these aircraft taper from FX66S196 at the root to a different tip section. Use the Tapered filter to isolate them, then click any tip airfoil link to compare geometries.
Related Airfoils
Engineers evaluating the FX66S196 frequently compare it against profiles with comparable geometric constraints. Below are the closest matches based on maximum thickness (13.6%) and max camber (6.8%).