For 2x6S or 12S LiPo with about 10,000mAh Total reduction of the mechanics 344/22 (Baby Lama) with motor set 3340: 1st stage (Ord.No. 344/100:640/23): 93:23 = 4.04 2nd stage (Ord.No. 344/55 and metal bevel gear): 55:11 = 5 Overall reduction from motor to main rotor: 4.04*5=20.21