From the first post :
Secret of antigravity is held by the military secretly and Black ops. It was discovered long ago back in the 1800's. Read up on all the airship reports from back then and you will see why I say that. Who the inventor or inventors are is a mystery and what became of these airships as well is a mystery as well.

You are contradicting yourself. If no one knows who the inventors are, how would you know that they exist? This is equivalent to saying nothing.

What aircrafts were around during the 1800's? The only known working aircrafts during those time were balloons and gliders. Given that the science behind those are well known, I don't see any point at looking at them for proof of anti-gravity. If you have something specific in mind, say it. Don't make others do your own work for you.

This example is based on several example of propulsion system from "The Secrets of Antigravity Propulsion." Page 152.

The flying craft would be moved forward by creating a gravity well or "gravity gradient". The craft, along with it's occupant, fall into the gravity well together, i.e. move forward together. To the passenger inside the craft there is no sense of falling and no sense of direction changes, no "G-Forces with straning faces of grunting passengers struggling to remain conscious by tightening the lower muscles of the body to retain blood in the brain. The craft can change direction instantly in sharp zipping turns and the passengers would not feel the changes of direction relative to the craft.

The "Gravity Well" is created through gradient differences by a charged ion field generated in front of the craft shown by +(plus) signs. The "Gravity Hill" is the dense jet of charged -(negative) ions thrust out behind the craft.

A gravity gradient is created between the negative hill and the positive well drawing the craft and occupants in the direction of the Gravity Well.

The craft can change direction instantly in sharp zipping turns and the passengers would not feel the changes of direction relative to the craft.

- Many people are amazed how quiet the B-2 is during take-off.

- First the USAF said Chemicals are added to the exhaust to cool the exhaust, but later they admitted, it is to prevent the forming of contrials.

The craft can change direction instantly in sharp zipping turns and the passengers would not feel the changes of direction relative to the craft.

this is too tangent and your link too much wikipedia. I have no idea if  the answer all the way from wiki.

Ok now what i can see it is incompleteness, incompetence, or outright bias.

The Wikipedia page for this physician has been deleted.

http://en.wikipedia.org/wiki/Wikipedia:Art...Robert_Cathcart

Why? Because Dr. Cathcart "does not meet notability criteria per WP:BIO

http://en.wikipedia.org/wiki/Wikipedia:BIO

The TR-3B’s performance is limited only the stresses that the human pilots can endure. Which is a lot, really, considering along with the 89% reduction in mass, the G forces are also reduced by 89%.

TR-3B utilizes little known loophole to create it's antigravity effects.

The 3 multimode rocket engines mounted under each corner of the craft use hydrogen or methane and oxygen as a propellant. In a liquid oxygen/hydrogen rocket system, 85% of the propellant mass is oxygen. The nuclear thermal rocket engine uses a hydrogen propellant, augmented with oxygen for additional thrust. The reactor heats the liquid hydrogen and injects liquid oxygen in the supersonic nozzle, so that the hydrogen burns concurrently in the liquid oxygen afterburner.” From 1998.