For the fuel tank selectors, have a look here:
http://forum.1cpublishing.eu/showpos...&postcount=179
For the autopilot, Blaster is mostly correct and as with all gyroscope operate instruments, the gyrocompass needs adjustment every 15 minutes or so, or after violent maneuvers.
I only have two other observations to add. First, the big red "disengage AP" button seems to be a temporary switch: the AP is disengaged when you hold it down, but as soon as you release it the AP snaps back into action. This is probably only for minor corrections to the tune of "oops, i'm slowly drifting into the 88s i'm supposed to be escorting, let's temporarily disengage the AP and maneuver wide of them".
I use keys that i mapped to the "course autopilot next/previous" functions to really turn it off for good.
Second, there's an offset of between 5 to 7 degrees between the master gyrocompass and the desired/commanded heading compass card.
For example, let's say i'm flying a heading of 100 degrees back to base and i want to engage the AP and stretch my legs a bit to relax. I look at the magnetic compass, place the mouse cursor over it and it reads 100 degrees. I then turn the master gyrocompass to 100 degrees.
To make sure the aircraft won't drift once i engage the AP, i also turn the desired/commanded heading compass card (what i want the AP to maintain) to 100 degrees.
The AP works on a correlation between these two, it completely ignores both the magnetic compass (right hand side of the cockpit) and the magnetic repeater compass and its course finder (the compass rose with the airplane silhouette in the middle disc).
So, the way to do it is:
1) Read magnetic heading (add the magnetic deviation if you want to be really precise).
2) Input magnetic heading into master gyrocompass
3) Input the same heading into the desired heading compass
4) Engage the AP.
At this point the aircraft should maybe drift left and right a bit until the gyroscopes stabilize, but it should for the most part stabilize with all relevant instruments (magnetic compass and repeater, master gyrocompass and desired/commanded heading compass card) indicating 100 degrees.
Well, it doesn't. It actually banks the aircraft until it's 5-7 degrees off each and every time. Not a big deal because it's always the same amount roughly so you can account for it when setting it (i just give it a wrong desired heading by 5-7 degrees the opposite way so it evens out), i just don't know if this is realistic behaviour or a bug.
In the end, if for example i want to go north the instrument face looks like this:
------N--
----N----
When it should look like this:
----N----
----N----
I don't know if this can be zeroed out by maneuvering "against" the AP, as it's perfectly possible to use the controls while the AP it's doing its thing.