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General Technical Chat / Re: new propellantless drive company
« Last post by Infraviolet on Today at 10:37:35 pm »I haven't followed the recent news on the EM "drive", but when it first made headlines in 2015 or so, I swear I remember that the thrust it supposedly gave per watt of supplied power was actually worse than the thrust one gets from a "photon drive" (that is to say shining a bright light out of the back and using the conservation of momentum to get a forward thrust, a photon drive gets you 1 N per 300 Megawatts). It seems like the EM "drive" is an experimental error with performance worse than that which would be achieved if one end were removed to make it an ordinary microwave emitter.