The Dassault Balzac V
This is another one of those ideas that sound promising on theory but are terrible in practice. The French-designed a plane based on the Mirage III. They wanted to create a plane that would take off vertically. Two pilots died during their test runs, but that didn’t stop them from trying again. Although the plane crashed again, thankfully the pilot was able to eject from the plane and survived.

The Dassault Balzac V