Defense Intelligence Reference Document Antigravity For Aerospace Applications

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where V2 is the standard Laplace differential operator. The le~-hand-side of Equation
(8) is the gravitational potential. Integrating Equation (8) once over a region of space
exterior to a ball (or thin spherical shell) of rest-energy density to obtain
(9)
where the standard spherically symmetric spacetime (or Schwarzschild) coordinate
system (l.r,8,cp) in which time 1, radial space coordinate r, and angular space coordinates
(8,cp) have their usual meaning is used.
The second approach (case b) can be derived by recalling that in the exterior
Schwarzschild spacetime around a central mass M (a ball or thin spherical shell) is
(10)
Since the definition is given that x =lv.J-xi,i,(r)I, then perform the radial derivative of
Equation (10) and again arrive at Equation (9).
Since from special relativity M = E/c2 (for a given rest-energy E), a negative energy
state is identical to a negative mass state (Reference 50). Thus the mass Min Equation
(9) can be replaced with the negative energy density -pE* = -pc2 = -Mc2/V by using the
volume (V=4rrr'-i5r) of a thin spherical shell of radius rand thickness Or, and rearrange
quantities to solve for pc* to get the final result:
,
-?C-
i = 4rr,G0r
-(t.05x!O")
~ 8r (Jim'),
( 11)
where x is now the acceleration due to gravity near the Earth's surface. If one desires
to use other geometries (for example, torus, cylinder, prism, cone, and pyramid)
instead of a thin spherical shell, then Equation (11) will admit minor numerical
adjustments to accommodate the relevant geometrical factors associated with different
geometrical volumes. Equation ( 11) gives the negative energy density required to
generate a repulsive gravitational force that counteracts the Earth's gravity field from
the surface all the way up to LEO (since x in LEO is only a few percent smaller than on
the surface). Any realistic value that one chooses for the bubble wall thickness .Sr will
give a negative energy density that will always be on the order of the equivalent
negative energy density of a dwarf star or neutron star. The technical challenge to
implement this kind of antigravity, however, is daunting.
In the next section the case of a cosmological antigravity that is generated by a form of
matter having a positive energy density and negative pressure is discussed.
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