Airfoil Data
STCYR234

The St. CYR 234 (Bartel 17-IC) is a thick 16.6% chord-thickness airfoil with a maximum camber of 8.3% at 30% 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 -8.3°.

Thin airfoil theory predicts a stall angle near 10.0° and a peak lift-to-drag ratio around 74 at typical UAV and light-aircraft Reynolds numbers — useful benchmarks before running a full XFOIL or NeuralFoil polar. The 17% thickness provides structural depth for main-spar placement without excessive drag penalty at moderate speeds.

Designers evaluating the STCYR234 typically compare it against profiles of similar thickness: GOE 384 AIRFOIL, MI-STRUT1, GOE 482 AIRFOIL, GOE 243 (MVA PR.3) AIRFOIL, GOE 435 AIRFOIL. The NACA 65(3)-218 is another reference profile frequently considered alongside it.