ArduCopter basic motor, this motor is used by most ArduCopter developers and it is very reliable. Even though it's smaller motor than its counterpart, it still creates a nice thrust with the 10x45 propellers. Motor features: •Size: 28 x 30 mm •Shaft: 3.17mm •RPM/V: 850 Kv •Prop: 10x45 •Batt: 2-4 S LiPo •Weight: 62gr •Cables: 35cm/18 AWG with bullets