The AvibirdV2 is a new bird, a new invention, not an improvement of my older models and has many advantage more. Simple single wing spar drive, profiled flexible wings. Low flapping rate and no internal wing friction. An unique control system that works during flapping and gliding. This model is a goose type of bird with a span of 1.4m and 850 gram weight. It flies about 15 minutes on a 1600mAh battery. She flies very stable.