"hello my son is learnng to fly the trex 450 v2 in Hong Kong we are interested in the arducopter flight control can you pl advise? tck101@yahoo.com cheers"

"http://youtu.be/pDcoh-uH83M this is the vid before crash"

"I will give it one last chance. The new carbon frame is coming, hope everything goes well. If it crashes again, I go for a DJI."

"My hexa before crash and after crash"

"would it be the radio problem? or would you check the ESC and motor individually and see if vibration is the cause? If the result still comes negative, will you use ACM? insist or give-up?"

"I had a similar experience as you. My hexacopter flipped over to the right and the arms hit the ground. The result was a total loss. I crashed all motor shafts, aluminum arms, the centre frame and an Xbee 900 pro. I wondered the crash was due to the…"