This is what happens when the yaw tilt mechanism of the tricopter fails, or at least this is what I think that happened...
I don't know how but the linkage rod of the yaw tilt mechanism came off from the servo arm. I need pliers to do that! I can't do it with my bare hands. The servo noise is from the camera tilt.
Firmware: ArduCopter 2.0.55
More likely servo failure. I think the control arm popped off when the prop/tail hit the ground.
It's strange... I've tested the servo and it's ok.
Did you test it under load? But, like you said, it takes a lot of force to get the servo arm to just pop out.
No, but I have a 3A UBEC (max 5A) and it usually consumes less than 1A.
Wow, those Go Pros are rock solid aren't they!
Yes! They are. After a lot of crashes I've broken only one GoPro and it still works partially :)
I noticed after all that it did manage to correct itself somehow and land on its belly. Really amazing crash.