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NASA's "Impossible" EmDrive motor tested - here are the results

EmDrive tested independently for the first time, suggesting that there is an everyday reason for the fiercely contested machine. This means unless you have an internal combustion motor that can produce propulsion without using propellant. The physically insensitive instrument, known as EmDrive, seems to produce thrusts by letting microwave waves bounce around in a conical hollow space without gas.

At the end of 2016, the instrument hit the news when a leaking trial report on the results of the last round of NASA tests was published. In Germany, now, independents have created their own EmDrive to test drive innovations and determine whether their apparent achievement is actual or an artefact.

"Rather than the EmDrive providing the impetus, it's an electromagnetical interaction," says the crew in a procedure for a recent spacecraft drive meeting. Scientists were able to monitor vibration, temperature variations, resonance and other possible thrusts, but were unable to screen the unit from the impact of the earth's own magnetism.

As they turned on the system, but damped the current to the propulsion itself so that basically no microwave waves buzzed around, EmDrive still succeeded in generating push - something it should not have done if it worked as the NASA crew states. For the time being, the scientists have come to the conclusion that the effect they measure is the outcome of the interaction of the earth's electromagnetic fields with electric wires in the chambers, a conclusion that other specialists concur.

"But in the case of EpDrive, the interaction with the Earth's gravitational pull seems to be the main reason for the small shocks," says Jim Woodward of California State University, Fullerton. Woodsward has developed its own propulsion unit named the Mach Effect Engine, which has also been tried and proven by the Dresdner Group.

However, to see what is going on with the EmDrive, the group must encase the unit in a Mu-metal sign that isolates it from the planet's magnetics. It is important to note that this type of sign was not part of the Eagleworks initial test equipment either, suggesting that the initial results could also be a result of leaky magnetism.

The EmDrive may sound like a slap in the face, but Woodward is not yet prepared to complete the case. Apart from the absence of mu-metal screening, the Dresden lab's testing was carried out at very low powers, which means that "any actual signals would probably be overshadowed by noise," he says.