Butterfly20-5-2 : Third Flight Test: Very Good Beautiful Flight

Butterfly20-5-2 : Third Flight Test: Very Good Beautiful Flight This ornithopter has four wings and all wing are flapping.(New Flapping Wing System) Because Rear wing long carbon rod is weak, ornithopter is suddenly down. I reinforced by carbon rod. Flight was improved. All Flight done by two180mAh 2cell Battery. width 94 cm length 53 cm weight 132 g battery Lipo 2cell 180mAh 12 g Total flight weight 144g Receiver: OrangeRx R410 Spektrum DSM2 Compatible 4Ch Receiver Servo: Elevon