If you want to know how electro-gravitic drone propulsion works, this is it

Original paper: https://www.scirp.org/journal/paperinformation?paperid=10298...

A lot of red flags, like

> It might be noted at this point that any such gravitational expression must propagate at superluminal speeds to maintain contact with celestial mechanics [9] [13].

The wikipedia page about the journal is not good https://en.wikipedia.org/wiki/Scientific_Research_Publishing

and [9] and [13] are self cites to dubious journals.