Hi,

i don't know how to say... my arducopter fly very well but sometimes it spin up motors for 1/2 seconds when hovering and i don't know why. I made a video, check the sound and the movement at 49 seconds. I check all connection between motors esc and so on.

What i can do or check?

(i use firmware 2.7 but it does the problem with 2.6 also)

http://www.youtube.com/watch?v=1XfARq98-jk