... if there is any possibility of some propellantless drive, it cannot arise from combining existing physical effects in a new complicated way, as all of those physical effects are known to be subject to the local conservation rules. It can only arise from new physics.
Mach Effect Thruster Developmenthttp://aspw.jpl.nasa.gov/files/ASPW2014%20ABSTRACTS/WEDNESDAY/Fearn.pdfTheory & Experimental Work on Mach Effect Thrusters (MET)http://aspw.jpl.nasa.gov/files/ASPW2014%20PRESENTATIONS/WEDNESDAY/Breakthrough%20Prop/Fearn.pdfMach’s principle, Action at a Distance and Cosmologyhttp://arxiv.org/pdf/1412.5426v1
please cross post to the mach effect thread too