Отсюда
http://www.rjxhobby.com/rjxvector-vectron/rjxvectronkits/rjxvectron520gNew 500mm blade size 3D Helicopter with full carbon frames and all Aluminium parts.
Very lightweight system and high performance head geometry for powerfull flight caracteristics
Main Rotor Diameter ca. 1117mm (500mm Blades)
Tail Rotor Diameter : ca. 204 - 224mm (70-80mm Tail Blades)
Gear Ratio : 5.9/11 (30T/16T Motor Pinion)
Tail Gear Ratio : 1 : 4.69
Total RTF Weight : 2600g - 2800g (depending Setup)
Lipos : 6S 3300mAh - 5300mAh
Max. Motor Size : 51.5mm (0/) x 50mm (h)