Airfoil Data
RG149

The RG 14 9% AIRFOIL is a thin 6.1% chord-thickness airfoil with a maximum camber of 3.0% at 31% 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 -3.0°.

Thin airfoil theory predicts a stall angle near 11.9° and a peak lift-to-drag ratio around 52 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 RG149 typically compare it against profiles of similar thickness: AH 85-L-120/17, NACA 64-210, EPPLER 426 AIRFOIL, RAE(NPL) 5213 AIRFOIL, EPPLER 472 AIRFOIL. The GOE 780 AIRFOIL is another reference profile frequently considered alongside it.