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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.
Claims that a drive is reactionless are generally considered by physicists to be pseudoscience. [13] The first design of a resonant cavity thruster claiming to be a reactionless drive was by Roger Shawyer in 2001. He called his conical design an "EmDrive", and claimed that it produced thrust in the direction of the base of the cone.
The Dean drive was a device created and promoted by inventor Norman Lorimer Dean (1902–1972) that he claimed to be a reactionless drive. [1] Dean claimed that his device was able to generate a uni-directional force in free space, in violation of Newton's third law of motion from classical physics.
In the general relativistic field propulsion system space is considered to be an elastic field similar to rubber which means that space itself can be treated as an infinite elastic body. If the space-time curves, a normal inwards surface stress is generated which serves as a pressure field. By creating a great number of those curve surfaces ...
The Helical engine is a proposed spacecraft propulsion drive that, like other reactionless drives, would violate the laws of physics. [1] [2] [3]The concept was proposed by David M. Burns, formerly a NASA engineer at the Marshall Space Flight Center in Alabama, in a non-peer-reviewed report published on a NASA server in 2019 describing it as "A new concept for in-space propulsion is proposed ...
Cognitively normal human brain samples collected at autopsy in early 2024 contained more tiny shards of plastic than samples collected eight years prior, according to a new study. Overall, cadaver ...
James F. Woodward (born 1941) [citation needed] is a professor emeritus of history and an adjunct professor of physics at California State University, Fullerton.He is best known for a physics hypothesis that he proposed in 1990, later expanded, that predicts several physical effects that he refers to as 'Mach effects'.
Indoor fetch or tug-of-war in a safe, open space. Short training sessions to reinforce commands and tricks. DIY obstacle courses using household items to encourage movement.