Inertial mass reduction
From the UAP Encyclopedia, the open encyclopedia of UFO and UAP history · 📖 Term
Contents 4
| Type | Term |
|---|---|
| Also known as | inertia reduction |
Inertial mass reduction is a hypothetical technology for reducing the inertia of a vehicle so that it could accelerate and manoeuvre in ways that would otherwise be impossible. It is best known from a 2018 U.S. Navy patent, "Craft Using an Inertial Mass Reduction Device", filed by Navy engineer Salvatore Pais, which drew wide attention for apparently describing a UFO-like craft.[1][2]
The Pais patent
Pais, an aerospace engineer at the Naval Air Warfare Center Aircraft Division (NAWCAD) in Maryland, filed the application in 2016 for a cone-shaped hybrid aerospace and undersea craft. It was at first rejected, but was granted on 4 December 2018 after James Sheehy, the Naval Aviation Enterprise's chief technology officer, wrote to the U.S. Patent and Trademark Office saying the invention was operable and warning that China was investing in similar technology. The patent expired in January 2023 when maintenance fees were not paid.[1][2]
The "Pais effect"
Pais's patents rest on what he calls the "Pais effect", in which electrically charged matter vibrated or spun at high speed would produce extremely intense electromagnetic fields, said to reduce inertia. Other related patents and applications claimed a gravitational wave generator, a compact fusion reactor and a room-temperature superconductor.[1]
Tests and criticism
NAWCAD tested the concept from October 2016 to September 2019 at a cost of about $508,000 and concluded that the effect could not be demonstrated; no further research was done. Physicists consulted by The War Zone over two years said the idea had no scientific basis. Some commentators have suggested the patents might be disinformation or linked to classified work, but no evidence for this has been produced.[1][3]
References
- Salvatore Pais — Wikipedia · en.wikipedia.org · archived copy
- "Docs Show Navy Got 'UFO' Patent Granted By Warning Of Similar Chinese Tech Advances", The War Zone · twz.com · archived copy
- "The Navy Finally Speaks Up About Its Bizarre UFO Patent Experiments", The War Zone (Feb 2021) · thedrive.com · archived copy
This page was last edited on 29 October 2026. Articles are written in our own words from the sources listed under References; disputed claims are attributed to the people who made them.
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