Edit: Title has been changed, leaving this for posterity.
Apologies for formatting, but the title doesn’t match the conclusion of the paper.
“First measurement campaigns were carried out
with both thruster models reaching thrust/thrust-to-
power levels comparable to claimed values.
However, we found that e.g. magnetic interaction from twisted-pair cables and amplifiers with the
Earth’s magnetic field can be a significant error
source for EMDrives.”
There was no experimental validation of this, just speculation based on their observations. They propose a simple fix, run the experiment in a magnetically shielded environment. They suggest Mu metal for maximum shielding, which would be good, but I’m a little skeptical that the vacuum vessels used in previous tests would have allowed a substantial flux of earths magnetic field through the environment. Using my phone's basic magnetometer, I get an order of magnitude reduction in field strength by placing it ~8" inside my oven and leaving the door open.
In any event they are probably on to something here. Certainly a more plausible explanation than any of the alternatives.
Apologies for formatting, but the title doesn’t match the conclusion of the paper.
“First measurement campaigns were carried out with both thruster models reaching thrust/thrust-to- power levels comparable to claimed values. However, we found that e.g. magnetic interaction from twisted-pair cables and amplifiers with the Earth’s magnetic field can be a significant error source for EMDrives.”
There was no experimental validation of this, just speculation based on their observations. They propose a simple fix, run the experiment in a magnetically shielded environment. They suggest Mu metal for maximum shielding, which would be good, but I’m a little skeptical that the vacuum vessels used in previous tests would have allowed a substantial flux of earths magnetic field through the environment. Using my phone's basic magnetometer, I get an order of magnitude reduction in field strength by placing it ~8" inside my oven and leaving the door open.
In any event they are probably on to something here. Certainly a more plausible explanation than any of the alternatives.