I am going to presume UFOs he saw are real etc.
This startlingly swift acceleration is a maneuver that could not be duplicated by any ship now made on Earth. What makes it possible for UFO's? According to many scientists and engineers, there is only one possible answer. The answer is ANTIGRAVITY : artificial gravity fields and control of gravity power.
Ok, pop quiz - what's gravity got to do with it?
Mr Keyhoe needs to read his Newtonian physics. The key thing about accelerationg is the change of momentum they involve. The thing is suspension of the conservation of momentum, not creating "antigravity". Antigravity cannot be directional as the sort of things he requries shows, but only apply between massive objects.
For no jets and exhausts, look at the Stealth Bomber. For unconventional propulsion, like ion propulsion, look at the so-called "Lifter". No antigravity.
Robotic craft are certainly a possibility.
Several years ago, Glenn Martin's vice-president for advanced design, G.S. Trimble, predicted that by 1985 practically all airliners would be using artificial gravity, flying at almost unbelievable speeds.
Hmm...
Though no breakthrough has occurred (unless in highly secret projects) two significant facts have been established.
Ahha! Now the article has stopped giving pointless quotes that cannot be verified, we can really begin to dish the dirt.
1. The Earth's G field is relatively weak, compared with the pull of gravity between planets and the sun.
This is BS. First, there is no distance given. Secondly, this is easy to prove or disprove with a few statistics on the distance between here and the sun etc. Third, the force from the Earth's "weak field" on the sun, with Newton's universal gravitation is exactly equal to the force of the sun and the earth.
2. There is a connection between gravity and electromagnetic fields.
Holy $hit! Excuse me, but I would think I would be aware if the Unified Field Theory had been found. The author has most certainly been found with his pants down.
Some scientists still call the gravity shield idea a "lunatic fringe" notion. But many now refuse to say that such a thing is completely impossible.
It is foolish to call anything completely impossible. But this gives no-indication that this is possible.
The results, Heim stated, if applied to space fight, would be direct levitation, conversion of electricity into kinetic energy without any waste, and "immunizing the occupants and the structures of such vehicles against any effects from acceleration of the vehicle, however great and violent."
"His approach is not in conflict with known laws of nature, and it agrees with the quantum theory," A.R. Weyl said in an analysis for the British magazine, Aeronautics.
I dunno, but the second law of thermodynamics seems like a very large law of nature to be in conflict with.
Some scientists are already saying privately that Einstein's famous "general theory of relativity" may turn out to be totally fallacious.
Of course it is false. Nothing is completely true. But didn't Weyl just say that the theory is not in conflict with known laws? Might I note how utterly stupid and insane to be talking about GR being utterly false is when you are comparing the most tested theory of all time with one based on speculation about things that may or may not even exist, and is certainly untestable, and is based on postulates that have never been shown in any experiment.
But, as you will read, there are others who find Major Keyhoe's latest chapter in "The Great Flying Saucer Story" important and plausible.
These people are fools who have chosen to blind themselves to what real experiments tell us about the world.
Grr...