Minimal runway length is around 460 to 500 mts, full flaps, full throttle. This depends on the surface as dirt, tarmac and dry-lake change the length of the space required to reached minimal take off speed (around 155 km/h).
Some airfields (like the airfield near Aristi) are not suited to match this plane's requirements, although autoland is functional in nearly all runways, it should be noted that the AI cannot take off on it's own, they can land, however they cannot take off once grounded.