Summer vacation has given me better things to do, like wandering the Finnish wilderness, so I have not had time to follow all weird and fringe lately.
EM-drive baloney keeps to be constantly propagated, this time by a group of physicists from Finland . Ah, what a treat from countrymen, again! The main contributor seems to be Arto Annila, a supporter of “Holistic Worldview“.
International Business Times writes :
“A new peer-reviewed paper on the EmDrive from Finland states that the controversial electromagnetic space propulsion technology does work due to microwaves fed into the device converting into photons that leak out of the closed cavity, producing an exhaust”
In the original paper , the authors deduct that:
“We infer that the EM drive expels photons in pairs where the two co-propagate with 180 degree phase difference”
Well, while I do not understand how pairs of photons like that are supposed carry out momentum and energy, let’s assume for amusement that they do. Would that save the fabulous Em-Drive from ridicule and get us to the stars?
Whilst I do acknowledge that the writers do not seem to agree with Shawyer’s own pseudo-scientific theory, they write:
“We believe that the proposed comprehension about the paired-photon exhaust will be helpful in optimizing power to thrust by engineering the cavity so that the photons will pair with opposite phases and exit from a preferred surface.”
If correct, all this would mean that Roger Shawyer’s bucket is a very, very inefficient photon rocket. How would that be interesting or useful as a space drive. The answer is, it would not.
It would be absolutely useless.
Bummer. Double bummer.
 EmDrive: Finnish physicist says controversial space propulsion device does have an exhaust
 On the exhaust of electromagnetic drive (Arto Annila et. al.)