Last year China claimed that they had built an EM drive.
The Chinese Space Agency released a video (this one: https://www.youtube....eature=youtu.be), but they don't go into detail.
What do you think about it? Do you think they are just achieving insignificant amounts of thrust?
If the EM drive worked, as far as I'm concerned it could gradually achieve 9.4% the speed of light.
I recently made a video on the most plausible methods of interstellar travel (https://www.youtube....e_eKz1ge_CxQxjw) but didn't include the EM drive as I think it is still too controversial and, well, I wanted to choose just the 5 fastest methods.