Airfoil Data
EIFFEL371

The Eiffel 371 (Monge) is a 14.5% chord-thickness airfoil with a maximum camber of 7.2% 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 -7.2°.

Thin airfoil theory predicts a stall angle near 10.7° and a peak lift-to-drag ratio around 72 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 EIFFEL371 appears in the wing design of at least 1 documented aircraft — notably by Bugatti. Its proven track record across canard designs makes it one of the more field-validated profiles in the UIUC database.

Designers evaluating the EIFFEL371 typically compare it against profiles of similar thickness: AH 94-W-301, WORTMANN FX 08-S-176 AIRFOIL, GOE 514 AIRFOIL, GOE 735 AIRFOIL, GOE 503 AIRFOIL. The NACA 63(3)-218 is another reference profile frequently considered alongside it.