Airfoil Data
MRC20-846

The MRC20-846 is a 9.5% chord-thickness airfoil with a maximum camber of 4.8% at 38% 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 -4.8°.

Thin airfoil theory predicts a stall angle near 11.7° and a peak lift-to-drag ratio around 62 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 MRC20-846 typically compare it against profiles of similar thickness: TsAGI R-3a (12%), NACA 6-H-10 AIRFOIL, S4310, GOE 407 AIRFOIL, Eiffel 428 (Bleriot). The MH 106 13.07% is another reference profile frequently considered alongside it.