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  2. Reactionless drive - Wikipedia

    en.wikipedia.org/wiki/Reactionless_drive

    A reactionless drive is a hypothetical device producing motion without the exhaust of a propellant.A propellantless drive is not necessarily reactionless when it constitutes an open system interacting with external fields; but a reactionless drive is a particular case of a propellantless drive that is a closed system, presumably in contradiction with the law of conservation of momentum.

  3. Field propulsion - Wikipedia

    en.wikipedia.org/wiki/Field_propulsion

    Conservation of momentum is a fundamental requirement of propulsion systems because in experiments momentum is always conserved. [11] This conservation law is implicit in the published work of Newton and Galileo, but arises on a fundamental level from the spatial translation symmetry of the laws of physics, as given by Noether's theorem. In ...

  4. EmDrive - Wikipedia

    en.wikipedia.org/wiki/EmDrive

    In 2001, Shawyer founded Satellite Propulsion Research Ltd, to work on the EmDrive, which he said used a resonant cavity to produce thrust without propellant.The company was backed by a SMART award grant from the UK Department of Trade and Industry.

  5. Spacecraft propulsion - Wikipedia

    en.wikipedia.org/wiki/Spacecraft_propulsion

    With a conventional chemical propulsion system, 2% of a rocket's total mass might make it to the destination, with the other 98% having been consumed as fuel. With an electric propulsion system, 70% of what's aboard in low Earth orbit can make it to a deep-space destination. [24] However, there is a trade-off.

  6. Ion thruster - Wikipedia

    en.wikipedia.org/wiki/Ion_thruster

    This was the first use of electric propulsion as the interplanetary propulsion system on a science mission. [25] Based on the NASA design criteria, Hughes Research Labs developed the Xenon Ion Propulsion System (XIPS) for performing station keeping on geosynchronous satellites. [99] Hughes (EDD) manufactured the NSTAR thruster used on the ...

  7. Laser propulsion - Wikipedia

    en.wikipedia.org/wiki/Laser_propulsion

    A laser-pushed lightsail is a thin reflective sail similar to a solar sail, in which the sail is being pushed by a laser, rather than the sun.The advantage of lightsail propulsion is that the vehicle does not carry either the energy source or the reaction mass for propulsion, and hence the limitations of the Tsiolkovsky rocket equation to achieving high velocities are avoided.

  8. Air-independent propulsion - Wikipedia

    en.wikipedia.org/wiki/Air-independent_propulsion

    Air-independent propulsion (AIP), or air-independent power, is any marine propulsion technology that allows a non-nuclear submarine to operate without access to atmospheric oxygen (by surfacing or using a snorkel). AIP can augment or replace the diesel-electric propulsion system of non-nuclear vessels.

  9. Advanced Electric Propulsion System - Wikipedia

    en.wikipedia.org/wiki/Advanced_Electric...

    The Advanced Electric Propulsion System qualification thruster inside one of the vacuum chambers at NASA Glenn’s Electric Propulsion and Power Laboratory. Advanced Electric Propulsion System ( AEPS ) is a solar electric propulsion system for spacecraft that is being designed, developed and tested by NASA and Aerojet Rocketdyne for large-scale ...