Originally posted by mbkennel
An established fact?
Yuppers that's what the man said...
last time I checked real world testing of anti-gravity has never been acknowledged as yielding positive results.
Perhaps its time you check again... but try something a little different... include the words "gravity shielding" in your search... anti gravity as
a term implies a physical force opposite gravity. Gravity shielding simply implies finding a way to overcome the effects of gravity, not coming up
with a whole new form of energy... and THAT does not go against Einstein...
Yet the end result is the same... you get a vehicle that does not need to be concerned about gravity.
There is as far as I know but one single experiment which has demonstrated any deviation from classical Einsteinian General Relativity.
As you say... as far as you know...
However Boyd Bushman a senior scientist at Lockheed Martin would tell you otherwise... take two neodymium magnets (around $5,000.00 a piece) force
them together like poles together and you generate a field that overcomes a portion of gravity around the object..
He is an interesting character... and is constrained by what he can actually say... but very interesting indeed. I will put links at the end of the
post...
That recent experiment was in a superconductor (where classical GR is expected to have some kind of modifiation, generally not known now) and showed
an extremely tiny effect, an amplification apparently due to quantum effects, of an effect predicted by general relativity.
There are other hypothetical (theoretical) papers dealing with solutions of GR equations which
assume the existence of some kind of "negative
energy" matter which can create warping of spacetime different from usual mass/energy. Let's be clear: those solutions are clever mathematical
manipulations, there is no physics yet connecting them as potentially real.
Let's also be clear: we have no "stuff" in our lab which is negative-gravitational energy. None of the things we engineer has any such property.
I actually think it is very unlikely any major company has any substantial research or accomplishment in that area. They are rather short-term money
focused
And you would be wrong... there are many companies with gov contracts working on just such projects, Even Stargate technology is being studied by
Government labs...
and something like this would take decades of first-principles study before it could accomplish anything useful for a product, if ever.
And we have had decades, ever since Nikola Tesla...
This is the province of a national laboratory and academic scientists, and there is no evidence at all of a sufficiently large and continuous
research program and test facilities, even secret, which would support even hypothetically secret anti-gravity aircraft.
NO EVIDENCE?? Have you even LOOKED
LANL (Los Alamos National Laboratory) Check their archives for "gravity sheilding and anti-gravity work and toss in "Warp drives" just for
kicks
AFRL (Air Force Research laboratory) Snoop around in there for a day or two.. Revolutionary Hypersonic Aerospace Vehicles With Plasma Actuators That
Require No Moving Parts ... notice anything unusual about the shape?
landoflegends.us...
MIT Levitated Dipole Fusion Reactor research... note the word LEVITATED
Helium 2 Fusion reactors with minimal shielding and almost zero waste...
landoflegends.us...
And I am just scratching the surface of whats PUBLCALLY available... I haven't even tossed in the DoD sources yet!
The leading frontiers of 'not yet really known physics' are in the "dark energy" seen cosmologically and maybe some we'll see some particle
anomalies if CERN can make the Higgs. The likelihood it's engineerable is very very small.
The likelihood of atomic energy begin engineerable a hundred years ago was also very very small
(yes i have read the guide too many times, but i DO know where my towel is) 
