we know this. But for our purpose 1600 is still too fast. For example when we publish
rostopic pub /mavros/rc/override mavrosmsgs/OverrideRCIn '[0, 0, 1540, 0, 0, 0, 0, 0]'
the rover does not move, but you can hear that the engine is working. Only with values above or equal to 1600 the rover moves.