Besides my own theory's on plasma fuel, for a photon engine on a flying saucer --- Zorgon.... might have posted a few diagram's that you posted in this thread.
edit on 29-1-2012 by Erno86 because: typo

The ARDA Mk4 "FairyStar" is the begining of a new serie of flying wings which uses the OAUGDP technology ( One Atmosphere Uniform Glow Discharge Plasma ). This is a first step towards a design of the full scale GDP Wing profile which will be used in a future ARDA Flying wing. In the ARDA "FairyStar" design the wing uses a OAUGDP panel as a thruster covered by a glow discharge plasma at high voltage and at high frequency. A kind of GDP panel has already been successfully tested by the NASA Langley Research Center by Roth and Wilkinson and a full report has been presented during the 36th Aerospace Sciences Meeting in Reno (January 1998) and also in my lab on December 21th, 1999 ( see the Glow discharge plasma skin tests ).

Originally posted by ZeskoWhirligan
As for UFOs utilizing "plasma technology," I'm not seeing that. I think that UFOs employ some sort of technology that might create plasma as a by-product — the way our internal combustion engines create heat and water vapor as by-products — but I don't see utilizing plasma as a propulsion technology in itself.
Originally posted by draknoir2
Popular Mechanics did a write up on external combustion propulsion.
Originally posted by Aliensun
Why is it so hard for people to latch onto that simple, seemingly correct theory manner of motion? Is it too difficult to envision a craft that creates a field around itself that cancels mass? Good lord, we see that function in about every science fiction film.