Geebax
Captain
Australia
Offline
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'I'm looking more an official answer on how often motors should be maintained, etc.'
I think you have been answered several times. The motors only have one component that wears, and that is the ball race(s) inside the motors. And they are not accessible, so you cannot lubricate them. However they should last for a very long time, and if the bearings begin to fail, you will get a 'Motor Obstructed' waring.
Other rthan that, it is only the props you need be concerned about. Nothing else on the aircraft is going to wear.
During WW2, there were no schedules for repairing the engines on most aircraft either, the simple reason being, if it acted up, throw it out and put a new one in. But more importantly, neither the aircraft or the pilot was expected to last long enough for anything to wear out.
Unfortunately, the same principle applies today to drones.
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