Airfoil Data
GOE281

The GOE 281 (DAIMLER XII) AIRFOIL is a 8.5% chord-thickness airfoil with a maximum camber of 4.3% at 30% 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 -4.3°.

Thin airfoil theory predicts a stall angle near 11.8° and a peak lift-to-drag ratio around 59 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 GOE281 typically compare it against profiles of similar thickness: GOE 546 AIRFOIL, GOE 280 (DAIMLER XI) AIRFOIL, NASA/LANGLEY LS(1)-0413MOD AIRFOIL, SD7032-099-88, AS5045 (15%) | Ref: http://www.krnet.org/as504x/ [original link: http://amber.aae.uiuc.edu/~ashok/kr2/airfoils/tests/]. The GOE 518 AIRFOIL is another reference profile frequently considered alongside it.