Asymmetries in electromagnetic interactions: A virtual-wire model for reactionless propulsion with preliminary experimental validation

For centuries, the most reliable rule in mechanics has been that every action has an equal and opposite reaction. If you push a cart, the cart pushes back; if a rocket expels gas to move forward, the gas pushes the rocket in the opposite direction. This principle, known as Newton's third law, suggests that to move something without pushing against anything else is impossible. In the realm of electricity and magnetism, however, the story is slightly more complex. While the total momentum of a system is always conserved, that momentum can be shared between solid objects and the invisible fields that surround them. Sometimes, the forces between electrical currents do not line up perfectly, or they arrive at different times, creating a subtle imbalance. For decades, scientists have wondered if these quirks could be harnessed to create a new kind of engine—one that moves without throwing away fuel or pushing against the air.

A recent study by researcher Yong Li explores this possibility by looking at a specific type of electrical coil that is not a complete circle. Imagine a wire loop that has a gap in it, like a letter "C" rather than a perfect ring. When electricity flows through such a shape, the forces inside the wire do not cancel out in the same way they do in a closed loop. The author proposes a new way to understand this phenomenon, suggesting that the missing part of the circle acts as a "virtual" connection that carries the balancing force in a way we cannot see. By building a model around this idea, the study attempts to explain how a net push, or thrust, could arise from an open circuit without violating the fundamental laws of physics. The research combines a fresh theoretical framework with a series of careful experiments to see if this push can actually be measured.

The core of the investigation rests on a concept called "carrier asymmetry." In a standard, closed electrical loop, the forces generated by the current cancel each other out perfectly, leaving the loop with no net movement. However, if you break the loop to create an open circuit, that perfect balance is disrupted. The researcher argues that the remaining physical wire experiences a net force because the reaction force, which would normally be felt by the missing segment of the wire, is instead carried by the electromagnetic field itself. To make sense of this without breaking the rules of physics, the study introduces a "virtual-wire" model. This is a mental tool where the gap in the coil is filled with an imaginary, massless wire for the sake of calculation. This imaginary wire absorbs the reaction force, allowing the physical coil to move in the opposite direction. The total momentum of the system remains conserved because the physical coil gains momentum while the electromagnetic field in the gap gains an equal amount in the opposite direction.

To test if this theory holds up in the real world, the researcher built two different experimental setups. The primary device used a C-shaped coil made of 12,000 turns of thin wire, with a gap opening of 70 degrees. This coil was driven by a high-frequency electrical signal at 100 million cycles per second, consuming about 5 watts of power. The entire assembly, weighing 270 grams, was suspended like a pendulum from a 1.3-meter string. The goal was to see if turning on the electricity would cause the pendulum to swing. To ensure that any movement was not caused by vibrations from the switch, air currents, or the Earth's magnetic field, the researcher performed several control tests. These included simulating the switch action without actually turning on the power and rotating the coil to face different directions: north, south, east, and west.

The results showed a consistent pattern that matched the theoretical prediction. When the power was turned on, the pendulum moved, but not immediately. There was a delay of about two to three seconds before the movement began, and after the power was cut, the movement did not stop instantly but faded away over a similar period. This lag suggests that the force is not a simple, instant push from radiation pressure, but rather something that builds up and dissipates over time, consistent with the idea of energy being stored in the electromagnetic field near the gap. Most importantly, the direction of the movement was always opposite to the direction the gap was facing. When the opening pointed east, the coil moved west; when it pointed north, the coil moved south. This directional relationship held true across twelve separate trials, and statistical analysis indicated that the chance of this happening by random luck was extremely low.

The study also compared this C-shaped coil with a U-shaped version to see if the shape mattered. Both designs produced movement in the direction opposite to their openings, with the estimated force being very small, on the order of one ten-thousandth of a newton. While the U-shaped coil showed slightly larger movement in some tests, the researcher notes that the difference likely comes from how the specific shapes resonate with the electrical frequency, rather than a fundamental flaw in the theory. The researcher explicitly ruled out common sources of error, such as thermal expansion or mechanical vibration, because the movement synchronized with the electrical timing rather than the slower processes of heating or cooling. The data suggests that the force is real and linked directly to the geometry of the open circuit.

Despite these promising signs, the researcher is careful not to claim that the mystery is fully solved or that a new engine is ready for use. The current experiments are described as preliminary and qualitative, meaning they show that the effect exists and behaves as predicted, but they do not yet provide a precise, high-accuracy measurement of the force. The author emphasizes that future work will require more sensitive equipment, such as a torsion balance in a vacuum, to measure the force with greater precision and to fully map out how the energy flows. The study does not claim to have broken the laws of physics; instead, it offers a new way to look at how momentum is shared between matter and fields in a specific, broken circuit.

The implications of this work, if confirmed by future rigorous testing, could be significant for space travel. A propulsion system that does not need to carry and expel fuel would allow spacecraft to travel for much longer periods and reach deeper into the solar system. The researcher suggests that if the design could be scaled up to handle much higher currents, the force could potentially increase to a level useful for practical applications. However, the paper stresses that these are theoretical projections. The immediate reality is that the effect has been observed in a small, controlled setting, and the next step is to prove it with the highest possible precision. The work stands as a proposal for a new mechanism of propulsion that fits within the known laws of classical physics, offering a path forward for exploring how electromagnetic fields can be used to generate motion without reaction mass.