Hi folks, This is such a simple idea that I know I can't be the first to think of it so there has to be a "gotcha". Maybe an induced electric field working in the opposite sense??? Is there a kind soul out there who can spare a few moments to educate me after reading what follows? Thanks About 40 years ago I asked myself if one could take advantage of the light speed propagation delay and came up with this: http://andersson-design.s3.amazonaw...n the face of conservation of momentum. Bob.