Some misunderstanding in calculation climb rate

[and-sh]

I don't really understand why there is an iddle here, because this will lead to the maximum speed down being greater than the speed up?
https://github.com/iNavFlight/inav/blob/8.0.0-RC3/src/main/navigation/navigation_multicopter.c#L153

[MrD-RC]

Looks to me like it's scalling here.

[and-sh]

It seems to me that the idle is added in the mixer and not in the receiver and it has nothing to do with the position of the sticks

[and-sh]

This is what it looks like. The descent speed is much greater than ascend.