Airfoil Data
GIIIL
GIII BL387 AIRFOIL
Wing Geometry Simulator
The GIII BL387 AIRFOIL is a thin 5.8% chord-thickness airfoil with a maximum camber of 2.9% at 30% 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 -2.9°.
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 GIIIL typically compare it against profiles of similar thickness: GIII BL86 AIRFOIL, N-14, RAE 5215 AIRFOIL, RAE 5214 AIRFOIL, AG53. The AH 93-W-174 is another reference profile frequently considered alongside it.
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Engineers evaluating the GIIIL frequently compare it against profiles with comparable geometric constraints. Below are the closest matches based on maximum thickness (5.8%) and max camber (2.9%).
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