[freebeard]

demonstrated up to 30% drag force decrease and 40% lift force increase for airfoil

Bingo!

Instead of being an anti-gravity force, this effect has been found to be caused by ionized particles exerting a force between two asymmetrical electrodes that produces a type of ion drift or ionic wind that transfers its momentum to surrounding neutral particles, an electrokinetic phenomena or more widely referred to as electrohydrodynamics (EHD).
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There are claims that all major aerospace companies in the 1950s including Martin, Convair, Lear, Sperry, Raytheon were working on it, that the technology became highly classified in the early 1960s, that it is used to power the B-2 bomber, and that it can be used to generate "free energy".

https://en.wikipedia.org/wiki/Electrogravitics

more discussion at https://en.wikipedia.org/wiki/Biefel...93Brown_effect

The Biefeld–Brown effect is an electrical effect that produces an ionic wind that transfers its momentum to surrounding neutral particles. The effect was named by inventor Thomas Townsend Brown who claimed that he did a series of experiments with professor of astronomy Paul Alfred Biefeld, a former teacher of Brown who Brown claimed was his mentor and co-experimenter at Denison University in Ohio. The phenomenon was also given the name "electrogravitics" by Brown based on his belief this was an electricity/gravity phenomenon. The effect is more widely referred to as electrohydrodynamics (EHD) or sometimes electro-fluid-dynamics, a counterpart to the well-known magnetohydrodynamics.