posted on Sep, 21 2003 @ 10:01 PM
I think in part at least you answer your own question.
Check this thread:
Nikola Tesla began experimenting with various forms of electrogravitic propulsion as early as 1889, with some reported successes in the laboratory.
Thomas Townsend Brown began similarly experimenting with a bit more success as early as 1923, where he was part of the team that discovered the
Brown/Beifield effect, which is the basis of electrokinetic antigravity.
All through the late 1940s and early 1950s, T. Townsend Brown experimented with a number of MHD systems, all of which exhibitted classic "flying
saucer" flight characteristics. In 1952, all of this research was officially classified top secret by the USAF when Brown was brought in to head
Project Winterhaven, a USAF project with the goal of developing a single seat MHD powered fighter craft capable of transatmospheric flight, and
airspeeds in excess of Mach 3.
Project Winterhaven was later covered up with a transmogrification into Project SilverBug, which reportedly included the use of standard turbojets and
resulted in the infamous AVRO disc vehicle.
(Now, why would you want to go from a known high performance MHD system to conventional turbojets in a George Jetson setup, unless you wanted
plausible deniability for the former technology?)
I would point out that the vast majority of reported UFO sightings occurred in the 1950s, which just happens to be when Project Winterhaven was
hitting its stride.