A magnetohydrodynamic drive or MHD propulsor is a method for propelling seagoing vessels using only electric and magnetic fields with no moving parts, using magnetohydrodynamics. The working principle involves electrification of the propellant (gas or water) which can then be directed by a magnetic field, pushing the vehicle in the opposite direction. Although some working prototypes exist, MHD drives remain impractical.
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Famous quotes containing the word drive:
“Foolishness is bound in the heart of a child; but the rod of correction shall drive it far from him.”
—Bible: Hebrew Proverbs 22:15.