The KFm Vikings goes to Kjekallen 

Have three wings now one uses 2205 the other 2206 and the third 2306 motor 2+00kV with (Gemfan 6042 6x4.2 Flash 2 blade propeller black 6 inch) For "heavy" and stable flight i use Battery 4S 2200mAh Lipo or 4S 3000 mAh liIon. For lither and fun flights in use 4S 1550mAh Lipo. The reason for my setup has not much to do withe efficiency and more to do with using the same setup on my 4S quad :D

Ah, ok, thank you very much