This is a dumb question but i just can't answer it ext/apu in the config panel what is it? Am i right its the apu on the plane thats running and its got GPU connected to it? If am right why? Is the EXT/AC not the same thing? And why the GPU on the ext/apu if the apu can provide its on power? Just not sure when to use this

Pls take a look at this:

 

http://www.support.fs2crew.com/help/manuals/#pageid=using_external_air_power_

 

And this:

 

http://www.support.fs2crew.com/help/manuals/#pageid=configuration_panel

 

 

APU is in the plane.  It can provide air and power.

 

The ground cart can provide power and/or air.

 

Cheers,

I'll keep reading man