De Havilland Comet
While the De Havilland Comet did have a lot of great features, its negative ones sorely outweighed the good ones. In fact, at one point the De Havilland Comet was the face of horribly-designed aircrafts. The engineers tried their best to rework the design, but unfortunately, none of the fatal events could be avoided.
The Devil’s Hoverbike
Did you know that hoverboards, which are quite popular today, were designed from a 1950s U.S. military aircraft design? They designed a one-man chopper plane in order for the U.S. Infantry to be able to hover into battle. This might sound awesome until you think about the fact that these very powerful blades that were propelling you into the air were located a mere four inches from your feet and you had to balance yourself above them!