MSFS2020 - Boeing 747 Autopilot Tuning Fix - V.1.0


This file contains new Asobo default 747 autopilot tuning parameters.  This eliminates the roll channel instability at high altitude.

Adjustments in this first version include:

1. Roll channel (between the flight director roll command and ailerons)..default had way too much gain and derivative for the flight dynamics.

2. Heading mode (loop between heading setpoint and FD roll command), had way too much derivative and was showing derivative kick).

3. Nav_ex1. This is the mode for following a nav line, way too sensitive, resulting in continuous rolling

That's all that's modified for now.  I tested at 40,000 from max IAS down to 210.  Stable.  Loop tuning is all about compromise..fast response to changes, but more gain than the system can handle and you introduce instability.

To install:

Put this file (ai.cfg) into your asobo-aircraft-b7478i directory, replacing the one that's there. There's also the original file in there names original 747-ai.cfg, if you ever want to go back to the default tuning.

For STEAM: C:\Users\[your username]\AppData\Roaming\Microsoft Flight Simulator\Packages\Official\Steam\asobo-aircraft-b7478i\SimObjects\Airplanes\Asobo_B747_8i.  

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