What is “gravitic propulsion” and could the US government hide it?Yes, by the observation of Gravitating Ball Lightning on earth and in space of TADPOLE Black holes..

          For Tadpole Black Hole propulsion by the self produced Plasma Tail pusjing the Black Hole.                  away from the plasma tail. see below.

Below:  Exploded massless Starspots seem to be tiny black holes creating Plasma tails pushing the central Neutron star into the direction of the positive charged former Starspot black holes configuration.