Harrier fighter
Jacques 14 1
F35B
It should be an anti-gravity aircraft, and Tesla also proposed that it can be realized according to Einstein's theory of relativity. It is said that Nazi Germany also did it, but there was no concept of physical objects.
1928, Tesla registered a patent with patent number 1 655, 144, which is about an aircraft between a helicopter and an airplane. Before his death, he had completed the design blueprint of the whole plane and called it a space driver and an anti-electromagnetic field propulsion system. But unfortunately, due to the lack of resources in Tesla era, he failed to turn this design into reality; It was not until 1950 that the American government discovered this design in the sealed Tesla manuscript, and then launched the "1794 project" to try to turn this design into reality. Although the Tesla flying saucer was finally made, it was still in the experimental stage because it consumed too much manpower and material resources, so the "Project 1794" was completed.