If you have an aircraft not updated in say a year and now you decide to update it. Using AE2 will mess up the flight_model.cfg and engine.cfg without any manual changes made.
To reproduce. use an aircraft not updated for a while and missing any new cfg parameters. backup cfg files for future comparison.
Notice that upon opening the AE that flight_model and engines already have a dot next to them as if they have been modified. For fun click on Save and resync. Notice that the two tabs still have a white dot. Open the cfg files and compare them to your backup. Notice the numerous things have been tagged with ;[REMOVED]
Now do a save and resync, again without any changes. And compare your back up the current state.
Notice now that your entire Fuel section has been tagged removed and you have this
[FUEL] ;[REMOVED]LeftMain = -0.4,-2.1,-1,44.400002,0 ;[REMOVED]RightMain = -0.4,2.1,-1,44.400002,0 ;[REMOVED]Center1 = -6,0,0,0,0 ;[REMOVED]Center2 = 0,0,0,0,0 ;[REMOVED]Center3 = 0,0,0,0,0 ;[REMOVED]LeftAux = 0,0,0,0,0 ;[REMOVED]LeftTip = 0,0,0,0,0 ;[REMOVED]RightAux = 0,0,0,0,0 ;[REMOVED]RightTip = 0,0,0,0,0 ;[REMOVED]External1 = 0,0,0,0,0 ;[REMOVED]External2 = 0,0,0,0,0 fuel_type =1 ;[REMOVED]number_of_tank_selectors =1 ;[REMOVED]electric_pump =1 ;[REMOVED]engine_driven_pump =1 ;[REMOVED]manual_transfer_pump =0 ;[REMOVED]manual_pump =0 ;[REMOVED]anemometer_pump =0 ;[REMOVED]fuel_dump_rate =0 ;[REMOVED]default_fuel_tank_selector = 1 ; Default fuel selector used in case of autostart, default is ALL. ;[REMOVED]default_fuel_tank_selector.1=1 ;[REMOVED]default_fuel_tank_selector.2=1 ;[REMOVED]default_fuel_tank_selector.3=1 ;[REMOVED]default_fuel_tank_selector.4=1 ;[REMOVED]default_fuel_tank_selector.5=1 ;[REMOVED]default_fuel_tank_selector.6=1 ;[REMOVED]default_fuel_tank_selector.7=1 ;[REMOVED]default_fuel_tank_selector.8=1
and you have this added.
[FUEL_SYSTEM] Version = 3 [HELICOPTER] collective_to_throttle_correlator = 0
Now some new parameters for engine have been added to the SDK for mixture. I see these new parameters and what can be assumed to be default table setups. However they don’t get saved to the engine.cfg. The three Mixture tables are added to the AE engine tab, however they are NOT added to the engine.cfg file. They only get added if you make a change to those tables, like add a fake table line.
this is added to a piston engine, which gives a red error (Duplicate Key found) on in sim build.
[TURBINEENGINEDATA] rated_N2_rpm = 0 n1_and_mach_on_thrust_table = ,,,,,,,,,,,,,,,,,,,, corrected_airflow_table = ,,,,,,,,,,,,,,,,,,,, n1_and_mach_on_thrust_table = ,,,,,,,,,,,,,,,,,,,, corrected_airflow_table = ,,,,,,,,,,,,,,,,,,,,
power_absorbed_cf=1.3 was reset to power_absorbed_cf=1
2000 gal of fuel in simvar, but not in AE??
it also added this due to fake adding of Fuel System section
this is missing or difficult to find