Plasma [propulsion works like a jet with ions for the gas or matter pushed out.

Roger Metcalf Myers has written:

'MPD thruster technology' -- subject(s): Electric propulsion systems, Space vehicles, Nuclear propulsion

'Applied-field MPD thruster geometry effects' -- subject(s): Plasma (Ionized gases), Electric propulsion systems, Space vehicles

'Evaluation of externally heated pulsed MPD thruster cathodes' -- subject(s): Electric propulsion systems, Plasma dynamics, Space vehicles

'Anode power deposition in applied-field MPD thrusters' -- subject(s): Plasma dynamics, Electric propulsion

Main propulsion is the function of the marine main engine.

Main engine is used for propulsion of ship.

The main source of propulsion.