"a smooth, white oblong object resembling a large Tic Tac breath mint flying at high speed over the water."
https://www.reuters.com/lifestyle/science/normalizing-ufos-retired-us-navy-pilot-recalls-tic-tac-encounter-2021-06-25/
"The Raumschiff was to be called the Andromeda-Gerät (Andromeda Device). Work on two of these massive 139 meter long and 30 meter diameter “flying cigars” "
http://greyfalcon.us/restored/Secret%20flying%20discs%20of%20the%20Third%20Reich.htm
"The invention discloses a mercury sphere antigravity propelling device which comprises a shell, an insulating partition, a strip-shaped super-conductive magnet, a positive electrode wall, a negative electrode wall, a buffer layer, an annular insulating cambered surface, a first capacitor and a second capacitor. The positive electrode wall, the negative electrode wall, the insulating partition and the annular insulating cambered surface form a closed annular channel, and a certain amount of mercury is filled in the annular channel. After the power supply is switched on, 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. The invention can freely go in and out of the earth's atmosphere without depending on the propulsion of the acting force and the counterforce of the air, can also keep static in any space, gets rid of the dependence on conventional fuel and air, and can meet the aim of flying in the space for a long time."
https://patents.google.com/patent/CN110857151A/en
"An anti gravity system with a hallow metal sphere (7) placed inside a very strong hallow outer metal sphere (1) with a clearance in between the two and the outer sphere having a sump at bottom, the clearance (8) between the spheres filled with mercury or lead, the sump (2) having an electric resistance coil (3) connected to a generating unit (4) via a transformer generates high temperature in the matter in between the spheres and a force is applied on the inner face of the outer sphere by the inner hallow sphere and the system looses its weight depending on the temperature."
https://patents.google.com/patent/WO2001009509A2/en