diametric drive

artist's concept of a diametric drive spacecraft

Artist's concept of a diametric drive spacecraft. Credit: Popular Science.

principle of the diametric drive

Principle of the diametric drive.
Credit: Popular Science.

A diametric drive is one of the seven types of hypothetical space drives suggested by Marc Millis of the Breakthrough Propulsion Physics Program at NASA's Glenn Research Center (see Millis drives).


A generic version of a 1957 negative mass propulsion concept, the diametric drive would somehow create an asymmetric field around itself. The interactions of the positive and negative field would then, it is conjectured, propel the spacecraft.