Because if FC alignment is wrong and the quad tilts left, gyro might think it's tilting right and corrects left. So FC is instructing to counter this by tilting more left and the quad goes bonkers. This stuff happens in miliseconds.FC alignment - Can you tell me why?
Thanks you memlak with your greatful comment and guide, with proper propellar must lead out for prop out style, setting yaw degree to 90 under configuration tab of betaflight.Because if FC alignment is wrong and the quad tilts left, gyro might think it's tilting right and corrects left. So FC is instructing to counter this by tilting more left and the quad goes bonkers. This stuff happens in miliseconds.
Any other faulty alignment is possible (left, right, front, back, 90°, upside down)...