American - TR-3B
"The TR-3B is Code named Astra. The tactical reconnaissance TR-3B first operational flight was in the early 90s. The triangular-shaped nuclear-powered aerospace platform was developed under the Top Secret, Aurora Program with SDI and black budget monies. At least 3 of the billion-dollar-plus TR-3Bs were flying by 1994. Aurora is the most classified aerospace development program in existence. The TR-3B is the most exotic vehicle created by the Aurora Program. It is funded and operationally tasked by the National Reconnaissance Office, the NSA, and the CIA. The TR-3B flying triangle is not fiction and was built with technology available in the mid-80s. Not every UFO spotted is one of theirs."
https://theeventchronicle.com/secret-plane-tr-3b-patent/
Triangular spacecraft
https://patents.google.com/patent/US20060145019A1/en
What Is Behind The U.S. Navy’s ‘UFO’ Fusion Energy Patent?
https://www.forbes.com/sites/arielcohen/2021/02/08/what-is-behind-the-us-navys-ufo-fusion-energy-patent/?sh=13ae01c04733
Chinese / French - Mercury Spheres / UFO
Ufo
"Inventor
陈久斌"
https://patents.google.com/patent/CN101797980A/en
Anti-gravity propelling device for mercury spheres
"Inventor
陈志强
张亮"
https://patents.google.com/patent/CN110857151A/en
Anti gravity system
"Inventor
Rao K. Nagarjuna"
https://patents.google.com/patent/WO2001009509A2/en
Nazi - HAUNEBU Discs / Andromeda Device
"Entwicklungsstelle 4], a development unit of the SS occult �Order of the Black Sun� was tasked with researching alternative energies to make the Third Reich independent of scarce fuel oil for war production. Their work included developing alternative energies and fuel sources through coal gasification, research into grain alcohol fuels, less complicated coal burning engines for vehicles and generators, as well as highly advanced liquid oxygen turbines, total reaction turbines, AIP [Air Independent Propulsion] motors and even EMG [Electro-Magnetic-Gravitic] engines.
This group developed by 1939 a revolutionary electro-magnetic-gravitic engine which improved Hans Coler�s free energy machine into an energy Konverter coupled to a Van De Graaf band generator and Marconi vortex dynamo [a spherical tank of mercury] to create powerful rotating electromagnetic fields that affected gravity and reduced mass. It was designated the Thule Triebwerk [Thrustwork, a.ka. Tachyonator-7 drive] and was to be installed into a Thule designed disc.
Since 1935 Thule had been scouting for a remote, inconspicuous, underdeveloped testing ground for such a craft."
http://discaircraft.greyfalcon.us/HAUNEBU.htm
"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” probably began with great effort in early 1943 in above ground heavily camouflaged shelters similar to that of the old Zeppelin hangars. These craft were designed to hold both a Haunebu II or IV disc in one large bay with two other smaller Vril 1 or 2 discs in a secondary bay - both accessed from the side of each craft. Each craft was to be crewed by 130 and were to be armored with a quadruple layered Victalen hull. The E-V unit nicknamed them as male and female “Freyr” and “Freya” after the old Norse God and Goddess.
The propulsion systems located at both the fore and aft sections of the Andromeda craft would be beyond the last Haunebu-type Thule Tachyonator 7c drive. These craft were to have four massive power units, two Tachyonator 11 at the front and two at the rear with four additional large SM-Levitator units located in pairs on the top and bottom of each craft which sat on a series of large underbody skids to support the massive weight. It is generally assumed that those engines were of the same EMG (Electro-Magnetic-Gravitic) type but other Allied Intelligence officers believe that they might have been photonic based on witness accounts of one large craft flying with a massive bright light source emitted from the rear."
http://greyfalcon.us/restored/Secret%20flying%20discs%20of%20the%20Third%20Reich.htm
"According to UFO fanatics, earlier in the month, NASA unintentionally spilled the beans about the U.S. government’s seven-decades-old top-secret space program when the agency’s LASCO C2 camera, on board the SOHO satellite, captured two images allegedly showing the latest advanced version of the Andromeda Spaceship, a UFO mothership that has allegedly been in the works since 1943."
https://www.inquisitr.com/3834575/nasa-accidentally-photographs-gigantic-andromeda-ufo-spaceship-orbiting-sun-proof-of-secret-u-s-space-program-dating-back-to-world-war-ii-conspiracy-theory
Nikola Tesla
"The hull can be made in a variety of shapes; sphere, football, disc, or streamlined rectangle or triangle, as long as these metal sheets, "are of considerable area and arranged along ideal enveloping surfaces of very large radii of curvature," p. 85. My Inventions, by Nikola Tesla.
The power plant for this machine can be a nuclear fission or fusion reactor [or any number of power generating devices] for long range and long-term use to run a steam engine which turns the generators.
A short range machine can use a hydrogen-oxygen fuel cell to run a low-voltage motor to turn the generators, occasionally recharging by hovering next to high voltage power lines and using antennas mounted on the outer hull to take in the electricity.
The short-range machine can also have electricity beamed to it from a generating plant on a long-range aircraft / spacecraft or on the ground."
"Nikola Tesla’s “flying stove”
’…You should not be at all surprised, if some day you see me fly from New York to Colorado Springs in a contrivance which will resemble a gas stove and weigh as much… and could, if necessary enter and depart through a window.’
Thus Nikola Tesla wrote to a Westinghouse Electric Company manager in 1912.
In some books about Tesla and his inventions, this description of his “box like” flying machine is told to be about his helicopter-like ‘flivver’.
Actually Tesla’s “flying stove” used an electro-propulsion system, which was to be powered by external power stations and Tesla’s ‘wireless transmission of energy-system’ or with a power generator inside the craft.
In a 1911 article from The Sun Tesla describes his flying machine:
“Dr. Nikola Tesla leaned back against his chair at the Waldorf last night and talked calmly of airships without planes, propellers or any of the other gear of the now familiar aeroplanes hurtling through space at tremendous speeds or driving more slowly carrying great loads, and in either case always as safely as the most prosaic of wheeled vehicles.”
“…How about aerial navigation?” Dr. Tesla was asked.
He considered for a moment or two and then replied with great deliberation:
“The application of this principle will give the world a flying machine unlike anything that has ever been suggested before. It will have no planes, no screw propellers or devices of any kind hitherto used.
“It will be small and compact, excessively swift, and, above all, perfectly safe in the greatest storm. It can be built of any size and can carry any weight that may be desired” – The Sun, New York – ‘Tesla Promises Big Things’
In a 1911 New York Herald article Tesla specifically explains that his flying machine is not a conventional airplane, nor a ‘lighter-than-air’- airship ( a Zeppelin-type).
He also tells us that his flying machine is not affected by winds or “holes in the air”, and that it can be held “...absolutely stationary in the air, even in a wind, for great length of time.” starting from section: Ten Horse Power to the Pound
Anyone familiar with the operation principles of the so called “conventional airplane” understands that Nikola Tesla’s flying machine described in these 1911 quotes has to be an ‘anti-gravity’ craft, so a real “flying saucer”."
https://nexusnewsfeed.com/article/science-futures/nikola-tesla-s-flying-saucer-electromagnetic-field-lift-experiments/
"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!
The design of Tesla’s Flying saucer aptly matches the descriptions of those who claimed to have seen a UFO from the inside. The basic design consists of a discoidal capacitor and a set of other small capacitors. The discoidal capacitor provides the thrust while remaining capacitors help in controlling the direction of the drive. His model also includes a gyroscopic stabilization system along with electric drive control."
https://advancetec.co.uk/science-now/a-look-into-nikola-teslas-research-and-patenting-of-a-ufo/