This video shows the accuracy of the IMU, is the demonstration that the ArduCopter code has achieved a great stability.
The bottles simulate huge variations in weight and trim, quad always tries to maintain his seat during the flight but also in changes in weight when cut with scissors each bottle (at the end).
I had already tried before with four bottles in one of my quad and I was quite sure what I was doing, but it's always interesting to add items to these challenges.
The specifications of this quad are in the video description.
Please note that these experiments can be many dangerous, multicopter is not a toy, i know i'm crazy (in a good way), anyway don't try to emulate me!
-= AC Dev Team =-