From “warp bubbles” to a working EMDrive, could it actually be possible to create an engine which appears to violate the laws of physics and revolutionize spaceflight? Paul Kocyla, a professional hardware developer, coder and space enthusiast, has used 3D printing to take on the task of studying the effect, and he's built a version of Roger Shawyer's EMDrive, a closed microwave waveguide with a changed geometry, which, when RF is fed into the cavity and a resonance is achieved a thrust force will occur. You can read the whole story here: http://3dprint.com/91880/3d-print-emdrive-thruster/