Source: wikibot/reactionless-drive
= Reactionless drive
{wiki=Reactionless_drive}
A reactionless drive is a hypothetical concept in physics and engineering that refers to a propulsion system that does not produce an equal and opposite reaction, as dictated by Newton's third law of motion. In traditional propulsion systems, such as rockets or jet engines, thrust is generated by expelling mass (fuel) in one direction, resulting in a reaction (movement) in the opposite direction.