Figured it out seems have to be above 200 kns to 0 rotor tilt.
Not quite correct ...
First, since you operate the Nacelles with a Spoiler Axis:
See Part VIII, item-4 in the FlightManual.
The SpoilerAxis needs to be properly calibrated.
Meaning:
It reaches full range between 0 and 100%.
- Calibrate the axis first in Windows.
- In the FSX/P3D menu (Options-Controls) set the Sensitivity of the axis to MAX, and add a small Nullzone if needed.
To test if it's properly calibrated:
- Shut down the engines on the ground, and wait until the proprotors have stopped rotating.
- Observe the value of the nacelles indicator in an MFD (PFD screen, top/left).
- When moving your SPoilerAxis lever over the full range, the nacelles angle should go from 0 to 97 v.v.
- If not: the axis is NOT calibrated properly !!
As to the min. airspeed needed to rotate the nacelles to 0 (APLN mode) in the air:
That depends if the AutoNacelles button is On or Not (Default: ON)
See section 6.1.3.1.14 of the FlightManual.
- When OFF: you can freely set the nacelles to 0 (or any other value) at ANY airspeed (when in the air).
- When ON ("ACT"): the nacelles are limited within the range specified in the fig. at page 26 of the FM.
Meaning that:
oo below 100 Knots airspeed, you cannot command the nacelles to 0 degrees.
oo above 200 Knots airspeed, the nacelles are forced to 0 degrees (APLN mode)
These actual limits are also visualised in the nacelles indicator ; see section 6.1.1.1, bullet "nacelles indicator".
Just another example how detailed this aircraft is modelled according to real-world specs.
And if you allow me to add (again)

: why it's so important to properly read and understand the FlightManual, before flying this MV22B simulation and fully enjoy flying it.
Rob