Board Thread:Game Updates/@comment-26091666-20151008040542/@comment-26574811-20151021100405

Prototype Keiun can only be equipped by Armored Carriers.

Keiun: 8100kg (combat load)

Ryuusei Model 11: 5700kg (combat load)

so the threshold of "heavy aircraft" is somewhere between 6000 and 8000 kg combat load?