IBTimes UK has posted an article claiming that the controversial "reactionless" EmDrive, conceived by British electrical engineer Roger Shawyer, is being tested on board the unmanned US X-37B military spaceplane, and on the Chinese Tiangong-2 space laboratory. The article by Mary-Ann Russon does not identify any sources for the claims.
Rocketeer comments: To say that I'm skeptical about this would be a considerable understatement. Testing for a novel acceleration effect which is... very weak, at best, would most easily be tested on as simple a platform as possible, not on a complex spacecraft with a poorly-constrained thermal and acceleration environment. Especially not on a manned platform with disturbances from the astronauts moving around.