Russell McMahon paradise.net.nz> writes: > The article on the "emdrive" - microwave powered reactionless drive > with no moving parts or external exhaust etc is available for reading > at This is actually a reaction drive because it is based on reaction (reactive) force, unless I missed something in the description. In the regular "jet" engine the reactive force is provided by expulsion of matter, in this case by expulsion of wave, somewhat similar to photonic drive (a-la startrek etc.). What they mean is the drive has no momentum because it has no moving parts. I wonder what the force an engine consisting of high-power laser will provide. Also, they have a picture of an aircraft using this type of engine to provide hoover capability. I bet amount of microwave radiation it will produce will wreak havoc on electronic equipment below the craft. Sergey Dryga http://beaglerobotics.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist