Autorotation: Setup Page Important Info Tracker

[MattKear]

This is a tracker to capture important information that we need to convey to users, ensuring that it gets captured in the Wiki:

• Downward facing LiDaR filter must be 0 Hz cut off.
• Recommendations for reliable LiDaR units known to work well for auto's?
• Vehicle mass estimation checks in glide phase.
• Collective behaviour when on ground after touchdown (waits 3 sec to confirm on ground and then lowers collective to zero thrust col)
• Height above ground measurement. Inertially interpolated rangefinder measurement if healthy and enabled, otherwise height above terrain, if enabled, otherwise height above home.
• Bail out logic and case whereby we will not revert back to auto we revert back to alt_hold.
• Default roll/yaw control is "loiter style". Stabilise control can be done via first bit of AROT_OPTIONS.
• Bad RPM sensor case drives collective to -2 deg
• It is important to have a good H_COL_HOVER value as this is used in the calculation of the flare height estimates.
• Related to the point above, it is advisable to have the heli configured to use a head speed governor of some sort. If the throttle-collective curve is used the H_COL_HOVER param will be learned based on battery voltage as head speed can vary based on battery voltage.