Super jumbo planes have long since been the subject of many fantasies and probably many bar and engineering class arguments.

The A380, the biggest airplane ever made, has been flying passengers for years. But what's really intriguing is that an even bigger super plane was in the works, and neither Airbus nor Boeing were behind it.

This is the story of the monster plane that dwarfed every other plane in passenger size and length but never came into existence.