"electromagnetic fields that affected gravity and reduced mass."
http://discaircraft.greyfalcon.us/HAUNEBU.htm
"Professor Schumann had invented the SM-Levitator"
http://discaircraft.greyfalcon.us/RFZ.htm
"Outside the earth's magnetic field, another propulsion system must be used"
https://nexusnewsfeed.com/article/science-futures/nikola-tesla-s-flying-saucer-electromagnetic-field-lift-experiments/
"Magnetic levitation (maglev) or magnetic suspension is a method by which an object is suspended with no support other than magnetic fields. Magnetic force is used to counteract the effects of the gravitational force and any other forces."
https://en.wikipedia.org/wiki/Magnetic_levitation
"Electromagnetic suspension (EMS) is the magnetic levitation of an object achieved by constantly altering the strength of a magnetic field produced by electromagnets using a feedback loop. In most cases the levitation effect is mostly due to permanent magnets as they don't have any power dissipation, with electromagnets only used to stabilize the effect."
https://en.wikipedia.org/wiki/Electromagnetic_suspension
"a method for propelling vehicles using only electric and magnetic fields with no moving parts"
https://en.wikipedia.org/wiki/Magnetohydrodynamic_drive
"Electrogravitics is claimed to be an unconventional type of effect or anti-gravity force created by an electric field's effect on a mass. The name was coined in the 1920s by the discoverer of the effect, Thomas Townsend Brown, who spent most of his life trying to develop it and sell it as a propulsion system."
https://en.wikipedia.org/wiki/Electrogravitics
"Sound levitation happens when sound waves interact and form a standing wave with nodes that can ‘trap’ a particle."
https://scitechdaily.com/a-new-sound-levitation-breakthrough/
"In a typical setup, an upper cylinder will emit high-frequency sound waves that, when they hit the bottom, concave part of the device, are reflected back. The reflected waves interact with newly emitted waves, producing what are known as standing waves, which have minimum acoustic pressure points (or nodes), and if the acoustical pressure at these nodes is strong enough, it can counteract the force of gravity and allow an object to float."
https://www.aip.org/publishing/journal-highlights/acoustic-levitation-made-simple
"A propulsion concept was developed based on a proposed resonance between coherent, pulsed electromagnetic wave forms, and gravitational wave forms (or space-time metrics)."
https://ntrs.nasa.gov/citations/19800010907
"A high frequency gravitational wave generator including a gas filled shell with an outer shell surface, microwave emitters, sound generators, and acoustic vibration resonant gas-filled cavities. The outer shell surface is electrically charged and vibrated by the microwave emitters to generate a first electromagnetic field. The acoustic vibration resonant gas-filled cavities each have a cavity surface that can be electrically charged and vibrated by acoustic energy from the sound generators such that a second electromagnetic field is generated. The two acoustic vibration resonant gas-filled cavities are able to counter spin relative to each other to provide stability, and propagating gravitational field fluctuations are generated when the second electromagnetic field propagates through the first electromagnetic field."
https://patents.google.com/patent/US10322827B2/en
"Field propulsion is the concept of spacecraft propulsion where no propellant is necessary but instead momentum of the spacecraft is changed by an interaction of the spacecraft with external force fields, such as gravitational and magnetic fields from stars and planets. It is purely speculative and has not yet been demonstrated to be of practical use, or theoretically valid."
https://en.wikipedia.org/wiki/Field_propulsion
"These are gravimagnetic systems and field resonance systems. The first are multipurpose propulsion systems employing the 'gravitational' effects of coherent electromagnetic energy configurations. The second are deep-space propulsion systems which artificially generate an energy pattern that matches precisely, or resonates with, a virtual pattern associated with a distant space-time point."
https://ntrs.nasa.gov/citations/19800054809
"systems that use regular coherent patterns of magnetic and electric fields of very high strength to interact with the structure of space-time to effect a quick translation from one space-time point to another."
https://ntrs.nasa.gov/citations/19800052277
"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
How Does Acoustic Levitation Really Work?
"the electromagnetic force is 2.2 x 10^39 times stronger than gravitational. This meant that Tesla’s design would be leagues more powerful than other scientists of his time could have imagined."
https://seenfeed.site/nikola-teslas-ufo-design-was-made-with-the-help-of-extraterrestrial-intelligence/
https://imgv2-2-f.scribdassets.com/img/document/186477819/original/f6fda23645/1587198278?v=1