DT520E Helicopter specification:
Length: 1045mm
Height: 305mm
Main rotor length: 520mm
Tail rotor length: 85mm
Main rotor diameter: 1160mm
Tail rotor diameter: 249mm
Motor drive gear: (16T /17T)/1100KV (19T /20T)/910KV
Main drive gear: 143T
Autorotation tail drive gear: 121T
Tail drive gear: 30t
Drive gear ratio: 1: 4: 8.9
Weight (without battery): 1900g
Radio transmitter and electronic equipment required for assembly:
Motor: 4020 (910kv / 1100kv)
Transmitter: (7-channel or more, helicopter system)
Receiver: (7-channel or more)
3G flybarless system x 1
Battery: 6s li-po 3500~4500mAh