Just heard following somewhere:
It is easy to distinguish four-engine passenger jetliner type, because there are only three of them:
- if it has "hump" upper deck then it is Boeing 747,
- if it has two decks then it is Airbus A380,
- otherwise it is Airbus A340.
Is this statement true?
I'm asking about commercial passenger jetliners only. So no cargo, no military etc.