Airfoil Data
AG27
AG27 Bubble Dancer DLG by Mark Drela | The AG2x airfoils are intended to be used on composite versions of the Bubble Dancer and the Allegro-Lite.
Wing Geometry Simulator
The AG27 Bubble Dancer DLG by Mark Drela | The AG2x airfoils are intended to be used on composite versions of the Bubble Dancer and the Allegro-Lite. is a thin 5.5% chord-thickness airfoil with a maximum camber of 2.7% at 32% 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 -2.7°.
Thin airfoil theory predicts a stall angle near 11.9° and a peak lift-to-drag ratio around 51 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 AG27 typically compare it against profiles of similar thickness: GIII BL288 AIRFOIL, EH 2.0/7.0, NACA/LANGLEY SYMMETRICAL, SUPERCRITICAL AIRFOIL, EH 1.0/9.0, SIKORSKY SC1095R8 AIRFOIL. The AG46ct -02f rot. is another reference profile frequently considered alongside it.
Related Airfoils
Engineers evaluating the AG27 frequently compare it against profiles with comparable geometric constraints. Below are the closest matches based on maximum thickness (5.5%) and max camber (2.7%).