Defense Intelligence Reference Document Antigravity For Aerospace Applications

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ultradense ball could be placed near the surface of the Earth and its 1-g gravity field will
cancel the Earth's 1-g gravity field. All test objects placed in the broad region between
the small ultradense ball and the Earth will thus be in free fall. Another option Forward
(Reference 2-5) suggested would be to shape the compact ultradense matter into a disk
that is 45 cm in diameter and 10 cm thick, and having the same mass and density as
the small ultradense ball. Its gravitational acceleration is ag = 4Gp,, where p is the mass
density of the disk and , is its thickness. In this case, the disk will have a force of
gravitational attraction that is the same on both sides, and it will be uniform near the
center of the disk where the strength of the gravitational force will be 1-g. If this disk
were to be placed very close above the Earth's surface, then there will be a
gravitational force of 2-g above the disk(= 1-g due to the Earth's gravity field plus 1-g
due to the top-side gravity field of the disk) while underneath the disk near its center
there will be a gravity-free (or free fall) region because the Earth's gravity field
underneath is canceled by the gravity field of the disk's bottom-side. While these are
interesting antigravity machines, they are unfortunately not feasible from an
engineering standpoint since one does not yet have the technology or means to create
and handle ultradense compact matter.
ENERGY ESTIMATE FOR NEWTONIAN LEVITATION
An ideal propulsion breakthrough could take the form of the antigravity-based levitation
of an aerospace vehicle within the Earth's atmosphere. Rockets like the Air Force DC-XA
can hover above the ground for a time that is limited by the amount of rocket fuel
available (Reference 6). But an ideal antigravity propulsion device should allow for the
indefinite levitation of a vehicle above the Earth's surface. It is illustrative to estimate
the energy required to levitate a 1-kg test mass above the Earth's surface. This will
help quantify a potentially key engineering parameter for such a levitation system. A
generic estimate can be found by considering the amount of energy per unit mass
required to nullify the (magnitude) of the Earth's gravitational potential energy E1c, for a
test mass m hovering at height h above the Earth's surface:
E =GM+m J/k)
"' h ( g ( 3)
Equation (3) can also be derived by calculating how much energy is required to
completely remove a test mass from the Earth's surface to infinity. This calculation is
more in line with the analogy to nullify the effect of gravitational energy. And Equation
(3) also represents the energy required to stop a test mass at the levitation distance h
if it were falling in from infinity with zero initial velocity.
Setting h ==R<±1 and 111 = 1 kg in Equation (3), the result is fav = 62.5 MJ/kg. This is 2.05
times the kinetic energy required to put the test mass into low Earth orbit (LED).
However, this estimate will require some adjustment that depends upon the type of
theory and its technological implementation. That is because the operational energetics
of a putative antigravity propulsion system must be considered in conjunction with Ein,
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