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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.
All designs for electromagnetic propulsion operate on the principle of reaction mass. A hypothetical drive which did not expel propellant in order to produce a reaction force, providing thrust while being a closed system with no external interaction, would be a reactionless drive, violating the conservation of momentum and Newton's third law. [17]
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.
Magnetic sail animation. A magnetic sail is a proposed method of spacecraft propulsion where an onboard magnetic field source interacts with a plasma wind (e.g., the solar wind) to form an artificial magnetosphere (similar to Earth's magnetosphere) that acts as a sail, transferring force from the wind to the spacecraft requiring little to no propellant as detailed for each proposed magnetic ...
The UK-based start-up NewOrbit Space has been developing an air-breathing electric propulsion system since 2021, achieving several milestones in the process. Notably, NewOrbit became the first in the industry to successfully operate and neutralize an ion engine entirely on atmospheric air in a vacuum chamber.
Smoothies are a fantastic way to get a powerful punch of nutrients. But, despite being packed with antioxidant-rich fruits and vegetables, many smoothies lack one key macronutrient that can help ...
The Casimir effect was investigated experimentally and analytically under the Breakthrough Propulsion Physics project. This included the construction of MicroElectroMechanical (MEM) rectangular Casimir cavities. [3] [15] Theoretical work showed that the effect could be used to create net forces, although the forces would be extremely small.
Yoko, a baby swell shark, swims in a tank at Shreveport Aquarium in Shreveport, Louisiana. The shark hatched from an egg on Jan. 3, 2025. Aquarium staff are unsure how the egg came to be, as ...