https://www.youtube.com/watch?v=535k8HqPQz0
Z-2 Bi Rotor, is the best Dual Copter, RC GPS bi copter, V Copter out there.
GPS Bi copter: http://tiny.cc/sv3ysz
GPS RC Helicopter FW450 V2: http://tiny.cc/ley6tz
Night Flight video: https://youtu.be/v-FB9wzVbRo
Watch my DIY Builds: http://tiny.cc/3iyxtz
Support our work: http://tiny.cc/bmcsm
Download my 3D models: http://bit.ly/2H3pxDH
Follow my Social Media: https://direct.me/alishanmao
Electric Power Systems For Surfboards, Boats and Paramotor: http://tiny.cc/prolawps