NASA should send one of these drives up to the Space Station and see if it can provide the advertised thrust.  If it does, then we can try to figure out how it works. This is not the first claim of tapping the zero-point energy of the vacuum.  There's also Blacklight Power, which claims to extract energy from hydrogen atoms by making the electrons drop below the quantum mechanical ground state.  --Gene From: Stuart Anderson <stuart.errol.anderson@gmail.com> To: "math-fun@mailman.xmission.com" <math-fun@mailman.xmission.com> Sent: Tuesday, May 19, 2015 3:17 PM Subject: [math-fun] EM propulsion drive http://www.nasaspaceflight.com/2015/04/evaluating-nasas-futuristic-em-drive/ A group at NASA’s Johnson Space Center has successfully tested an electromagnetic (EM) propulsion drive in a vacuum – a major breakthrough for a multi-year international effort comprising several competing research teams. Thrust measurements of the EM Drive defy classical physics’ expectations that such a closed (microwave) cavity should be unusable for space propulsion because of the law of conservation of momentum.