While covered in-depth in another article, the origins of the famous Boeing 747 hump are from its humble beginnings as a cargo aircraft. That’s right, the Boeing 747, while flexible enough platform for both passengers and freight, was primarily made for cargo carriers.

This is because at the time, the Concorde was all the range, and Boeing (with its own supersonic project) thought that the future was in faster and faster travel. Engineers didn’t want to work on the Boeing 747 project as they believed that it would be a simple slower-than-sound freighter.