Airfoil Data
CAL1215J

The CAL1215j is a 8.0% chord-thickness airfoil with a maximum camber of 4.0% at 34% chord, suited to general-aviation and UAV wing design. At zero angle of attack the cambered geometry generates positive lift, giving an estimated zero-lift angle of -4.0°.

Thin airfoil theory predicts a stall angle near 11.8° and a peak lift-to-drag ratio around 58 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 CAL1215J typically compare it against profiles of similar thickness: GOE 442 AIRFOIL, GOE 396 AIRFOIL, GOE 408 AIRFOIL, GOE 432 AIRFOIL, I.S.A. 571. The GOE 652 AIRFOIL is another reference profile frequently considered alongside it.