A few 'gotchas' for which any "AG" research must beware:
If your device touches the floor, or sits on a boat, then it can
produce a sideways thrust which may LOOK like gravity, but which is
nothing but a frictional "rachet" effect. To perform a proper test,
do a "Pendulum Test" by suspending your device from a long rope,
orienting it to produce sidways thrust, then enclosing it in a bag
to prevent any air motions from interfering. If your device can
constantly deflect itself as a pendulum, then you've got some solid
evidence for "anomalous thrust."
If high voltage is involved, everyone should realize that bare metal can
emit air jets which create forces. Even a small corona discharge can
eject a stream of "electric wind." Spinning gyroscopes can do the same,
an unshrouded flywheel can act as a propellor blade. If we surround our
antigravity device with a plastic bag, then any thrust from air jets is
eliminated. If doing so also eliminates the weight change, then perhaps
the weight change was really caused by air jets from moving parts or
from high-voltage all along.
If high temperatures are involved, then rising plumes of hot air can
create forces. If the AG force from your device is small, and if it
rises slowly with time and then decreases slowly when power is removed,
then suspect bouyancy forces and rising hot air. To eliminate this
problem, operate your device within a vacuum chamber. Or, if your
device is meant to create a directional thrust, then rotate your device
so that all of the expected force is sideways. Hot air should mostly
produce up/down forces, and should therefor be separate from any
sideways forces created by genuine AG effects.
Electrostatic forces caused by high voltage can masquerade as
small weight changes. If any part of your device becomes "frictionally"
charged, or if your device employs high voltage as part of its
operation, then electrostatic forces will be present. One way to
eliminate them: surround your device with a conductive bag (aluminum
foil or aluminized mylar), and use a fine wire to connect the
conductive bag to earth. This will eliminate any electrostatic forces
between the bag and the outside world.
Don't trust scales, especially if your device is vibrating. Some
scales are nonlinear, and will convert any vibrations into a false
reading of directional force. Better to suspend your device
from a pendulum, orient it so that it produces sideways thrust, then
measure any deflection from vertical. Or, if your device only produces
changes in weight, then build a balance beam, suspend your device from
one end of the beam, and attach a counterweight to the other end.
(And surround it in a conductive plastic bag to eliminate electrostatic
forces, AND perform the experiment in a vacuum chamber to eliminate
forces caused by rising hot air.)
And finally, beware of PSYCHOLOGICAL forces! :) Very often we will let
our experiments become entangled in our egos. This is bad, because in
order to shield against ego damage, we will stop looking for con-
ventional explanations for apparant success. If my antigravity device
seems to really work, my first thoughts should NOT be about how superior
I am when compared to other researchers, or about the riches and
accolades I soon will receive. Those thoughts will steer me away from
discovering even the most obvious sources of failure. Instead my first
thoughts should be "OK, so how am I fooling myself THIS time?"
Obviously all of the above warnings apply to SMALL forces. If your
device can lift itself off the table and fly around the room, then there
is little doubt that you have a genuine AG effect. Better put it in
a plastic bag anyway, just to convince the doubters that you have no
electric helicopters hidden somewhere inside it! :)