Paul March, a senior staff scientist at NASA's Johnson Space Center, has posted an update on NASA's work to test the controversial EmDrive propulsion, which uses electromagnetic microwave cavities to directly convert electrical energy to thrust without the need to expel any propellant.
First proposed by Satellite Propulsion Research, a research company based in the UK founded by aerospace engineer Roger Shawyer, the EM Drive concept was predictably scorned by much of the mainstream research community for allegedly violating the laws of physics, including the conservation of momentum.
However, NASA Eagleworks - an advanced propulsion research group led by Dr. Harold G. “Sonny” White at the Johnson Space Center (JSC) - investigated the EM Drive and presented encouraging test results in 2014 at the 50th Joint Propulsion Conference.
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