Airfoil Data
RG15A111

The RG 15A-1.8/11.0 AIRFOIL is a thin 7.3% chord-thickness airfoil with a maximum camber of 3.6% at 35% chord, suited to high-speed UAVs, sailplane tip sections, and propeller blade design. At zero angle of attack the cambered geometry generates positive lift, giving an estimated zero-lift angle of -3.6°.

Thin airfoil theory predicts a stall angle near 11.8° and a peak lift-to-drag ratio around 56 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 RG15A111 typically compare it against profiles of similar thickness: RAE(NPL) 5212 AIRFOIL, S4095 (designed for the E-flite UMX ASK-21 scale RC sailplane), GOE 372 AIRFOIL, GOE 585 AIRFOIL, SD2083 (9.0%). The Apex 16 (normalized using XFOIL date021206) is another reference profile frequently considered alongside it.