Anti-gravity is an idea of creating a place or object that is free from the force of gravity. It does not refer to the lack of weight under gravity experienced in free fall or orbit, or to balancing the force of gravity with some other force, such as electromagnetism or aerodynamic lift. Anti-gravity is a recurring concept in science fiction, particularly in the context of spacecraft propulsion.

Declassified Documents

 Gravity-Antigravity Mathematical Formulas, theories and calculations; Gravity Motor, dated 6 October 1988 [15 Pages, 2.2MB] – Unsolicited proposal from Wolfgang Palle, Kastelruth, Bozen, Italy. 1988 sent to the United States. 26 pages were withheld in their entirety on this request.

 A Postulated Mechanism that Leads to Materialization and Dematerialization of Matter and to Antigravity, 8 October 1975 [25 Pages, 1MB] – This document presents a discussion of the postulated mechanism that leads to the materialization and dematerialization of matter and to antigravity. The mechanism also explains why an orbital electron does not radiate energy, in contradiction to classical electromagnetic theory. One of the paradoxes of special relativity is explained. A new model of a photon is advanced. The relativistic increase of mass with velocity is explained.

 Antigravity, by W.K. Ergen, January 1958 [ 9 Pages, 0.7MB ] – Scientific study from the United States Air Force in 1958 that proposed the idea that anti-matter and matter may repel the gravity of each other, thus creating “antigravity”.