"First, the main problem is one of energy. In the same way that a car needs gasoline, a time machine needs to have fabulous amounts of energy. One either has to harness the power of a star, or to find something called “exotic” matter (which falls up, rather than down) or find a source of negative energy. (Physicists once thought that negative energy was impossible. But tiny amounts of negative energy have been experimentally verified for something called the Casimir effect, i.e. the energy created by two parallel plates). All of these are exceedingly difficult to obtain in large quantities, at least for several more centuries!"
https://mkaku.org/home/articles/the-physics-of-time-travel/
"Tesla’s “Flying Saucer”
In 1928, Nikola Tesla registered a controversial patent. The patent claimed itself to be the “World’s First Flying Saucer”. This was groundbreaking for Tesla. This is because he had utilised the prowess of Electromagnetic force instead of Gravitational. Among the two, Electromagnetic force is said to be powerful. Hence if this Flying Saucer was to be a reality, then it might as well be the fastest aircraft. Scientifically, the Electromagnetic force is (2.2 x 10^39) stronger than the Gravitational. To put it into perspective, if the energy required for mechanically lifting a block at a distance of one-quarter of a millimetre is, say X. If the same energy given to the block using Electromagnetic force, it could lift the block (5.6 x 10^24) km. That is how powerful the aircraft propelled using Electromagnetic force would be!"
https://advancetec.co.uk/a-look-into-nikola-teslas-research-and-patenting-of-a-ufo/
"German Disc Aircraft Propulsion Theory Based on the KT-P2 Celestial Navigator
- The discs were electrically propelled.
- The propulsion system created an electric field around the discs which necessitated the development of an inertial guidance system and compass, since a magnetic compass would be useless due to the "Faraday Cage" effect".
- The discs used a horizontally oriented gyro master compass (Meisterkreiselkompass) calibrated prior to take-off to true north, as the frame of reference with which to navigate the disc using an electromagnetic slave compass, which was interconnected to stepping switches which also actuated the disc's bi-polar propulsion electrodes.
- The system cancelled the normal effects of gravity, inertia, and momentum, and instantly synthesized momentum in the chosen direction without disturbing the operation of the master gyro, which continued to maintain its heading during flights, apparently because of an "internal' inertia/momentum within the disc's outer hull.
- The instant turns showed an incompressible ether which is integrally locked with mass in the phenomena of inertia, momentum, and gravity."
http://discaircraft.greyfalcon.us/lyne.html
"To create, by claims (1 a, 1 b, 1 c), an intense vertical line charge at the corners (1 b) and a horizontal electric field that that is parallel to the sides of the hull (1 a);
- To create, by claims (1 d,1 e), an electromagnetic wave with a vertically polarized electric field traveling outward from the side of the hull (1 a); and
- To create, by claims (2,3), an interaction of the electrostatic field (2) with the electromagnetic wave (3) such that a combined spacetime curvature pressure is generated on the hull in the upward and forward direction to produce lift and propulsion respectively."
https://patents.google.com/patent/US20060145019A1/en
"Marconi vortex dynamo [a spherical tank of mercury] to create powerful rotating electromagnetic fields that affected gravity and reduced mass."
http://discaircraft.greyfalcon.us/HAUNEBU.htm
"the mercury rotates anticlockwise at high speed under the action of electromagnetic force, and thrust in a direction deviating from the center of the shell is applied to the wall surface of the whole negative electrode due to centrifugal action. The direction of the total thrust is opposite to that of the gravitational pull, so that the influence of the gravitational pull is counteracted, and the device has the antigravity propelling capacity"
https://patents.google.com/patent/CN110857151A/en
"Called a magnetohydrodynamic (MHD) drive, the system has no moving parts at all - just magnets and an electric current.
It works by generating a magnetic field at a right angle to an electric current. That creates a force - called the Lorentz force - which acts on the sea water and propels the craft along"
https://www.bbc.com/news/business-65958967
UFO in Jerusalem