SoylentNews is people
SoylentNews
The proposed radio frequency (RF) resonant cavity thruster is unlike conventional thrusters and uses no reaction mass and emits no directional radiation. Designed using principles that are not supported by prevailing scientific theories, it apparently violates the law of conservation of momentum. The EmDrive, has roiled the aerospace world for the several years now, ever since it was proposed by British aerospace engineer Robert Shawyer. The essence of the claim is that by bouncing microwaves in a truncated cone, thrust will be produced out the open end. Most scientists have snorted at the idea, noting correctly that such a thing would violate physical laws. However, prestigious organizations like NASA have replicated the results showing thrusts.
MIT Technology Review has some reasoning on the subject, (possibly pay-walled) with a picture of the device. It's supposedly the so called unruh effect at play. When NASA tested the device, they measured with input of 17 W an average thrust of 91 µN (5.4 µN/W). A Chinese team used 2500 W and measured a thrust of 720 mN (288 µN/W). The expected radiation pressure is closer to 0.003 µN/W.
(Score: 0) by Anonymous Coward on Saturday April 23 2016, @12:40AM
"Agreed but as the saying goes "extraordinary claims require extraordinary evidence""
That saying, popular as it is, is false.
The problem with this statement is that science does not require extraordinary evidence for its extraordinary claims. Big Bang theory may be the most extraordinary claim in the history of science. Here we have an idea that can be neatly encapsulated in eight words: "At first, there was nothing...then it exploded." But how can NOTHING explode? Big Bang theory "defies gravity" and violates innumerable laws of physics, it remains a HYPOTHETICAL mathematical model, yet it is promoted as truth by NASA and institutions of higher learning around the world.