Reely 450 ARF Notice D'emploi page 60

Should you not set the neutral position , the quadrotor helicopter will use either the factory settings or the last saved
value!
It is very important that you set the neutral position of the quadrotor helicopter as precisely as possible. For
this, it in necessary to set the neutral position on a completely horizontal base. Ideally, this should be
measured using a spirit level.
It is therefore extremely recommended that you set the neutral position before first flight. Due to different environmen-
tal conditions than in the factory and/or at the actual place of flight operation, the factory setting may not be ideal!
Should the quadrotor helicopter still swerve towards one direction despite the relevant trims to the transmitter, the
neutral position must be saved again, in that the quadrotor helicopter is lifted up slightly on the side in which it swerves.
In this way, the (manipulated) position is saved as the new centre position.
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