But somehow, despite all of the reasons it shouldn’t work, it does.
Now in this question - it is strongly suggested that this doesn't work.
So at best, Shawyer has invented a very inefficient and expensive fan.
Even further - this answer states:
Shawyer's "analysis" is a mess, incoherent and deeply confused about fundamental aspects of relativity.
My question is: Has NASA confirmed that Roger Shawyer's EmDrive thruster works?
There may be an answer here. I just don't know what it means.
I don't believe this is a duplicate of the other question - as it is not clear how much to trust NASA's engineers - or what their comment actually means.