IRL FE tasks

[x] After takeoff, pilot surrenders throttle control and the engineer keeps the engines under their manifold pressure limit.
[x] FE manages fuel mix to manage BMEP parameter and operates supercharger speed select to keep manifold pressure up while above 9k ft
[x] FE operates power and pitch selectors to manage forward speed
[ ] FE cuts fuel valves in and out to keep centre of gravity in range and prevents engine starvation using crossfeed line
[ ] FE preempts engine fire using cowl flaps or power setting to keep temp down; if however an engine does catch, the FE cuts power and fuel, then feathers the prop
[ ] FE reads magnetic compass and sets heading gyro accordingly
Sourcing and implementing those features
engineer automation has been done before on the Tu-144
generic AP has an autothrottle PID and so does Lockheed1049h-autopilot.xml; see implementation options below
Autostart already implemented by someone; replace it and/or move it into a bigger Flight Engineer menu window
A fair bit will have to be written from scratch, though. Try to reverse engineer the FDM/instrument rules for engine fire and for BMEP
Implementation options for autothrottle
1. Disable when auto engineer is turned off
2. Cause speed commands passed to engineer to simply trigger the autothrottle rule outside the engineer system

mtkft / Lockheed1049h