From BEASTX Wiki
During slow hovering pirouettes the helicopter is rolling out.
The pirouette optimization setting may be wrong:
- MICROBEAST/AR7x00BX: Adjust the pirouette optimization at Setup menu point N correctly.
- MICROBEAST PLUS: Check if mounting orientation is setup correctly at Setup menu point A. Note that mounting orientation is setup differently compared to older devices!
Apart from this also make sure the helicopter is well balanced (center of gravity setup correctly?) and servos are trimmed properly.