Field Propulsion Drive

A Reaction Drive is any drive system leveraging Newton's Third Law of Motion, namely that "For every action there is an equal and opposite reaction", and thus produces motion for a vessel along a given momentum vector by imparting to some other body, bodies, or total amount of matter/mass-energy an equal magnitude of momentum along a vector directly antiparallel to the vessel's acquired momentum vector.

"Propellantless" Reaction Drives such as Field Propulsion Drives which interact with and transfer momentum between masses and bodies via charge and force-field interactions are also engaging in action-reaction coupling, and are thus properly Reaction Drives, although many people erroneously refer to them as "Reactionless Drives", when in fact they are more properly merely "propellantless drives". The majority of the modern Gravitic Maneuver Drive systems fall into this category, as they interact with gravitic pseudo-gravity fields that couple to mass and matter: the gravitic-based drive gains momentum at the expense of one or more gravitating bodies' angular and linear momentum within a star system.

• Use the following list to determine a specific drive type:

The following Impulse Drive types are all Gravitics-based Propellantless "Field-Propulsion Drive" systems found in relatively common use:

1. Z-Drive (Lifter) or "Contragravity-Lifter"
2. G-Drive (Gravitic Drive) (Standard Gravitic-Thruster)
3. M-Drive (Gravitic "Maneuver Drive") (High-performance Intermediate-Range Gravitic-Thruster / Relativistic Interplanetary Drive)
4. N-Drive (Gravitic "NAFAL" Drive (= "Not As Fast As Light")) (Long-Range Gravito-Nuclear Thruster / Relativistic Interstellar Drive)