mar 25, 1957 - Hovercraft
Description:
The idea of the modern hovercraft is most often associated with a British mechanical engineer Sir Christopher Cockerell. ... Cockerell built several models of his hovercraft design in the early 1950s, featuring an engine mounted to blow from the front of the craft into a space below it, combining both lift and propulsion.https://en.wikipedia.org/wiki/HovercraftAdded to timeline:
Date:
mar 25, 1957
Now
~ 68 years ago