new propellantless drive company

[EPAIII]

I didn't see anything in that article that even gave the smallest hint of HOW it is supposed to work.

Like the EM drive,

https://thedebrief.org/nasa-veterans-propellantless-propulsion-drive-that-physics-says-shouldnt-work-just-produced-enough-thrust-to-defeat-earths-gravity/

this one uses a capacitor. Instead of piezo (not that a piezo is not a capacitor) , but it sounds similar. That is that there is some unequal force in a polarizing material which leads to thrust. Not a (weak) photon drive.