EmDrive

Now you're starting to see the problem with the EMdrive!

Problem ???
That's one of the best features of the EMDrive.

>Here is a concrete contraption to get unlimited energy, and unlimited deltaV, given the hypothesis of constant "propellantless thrust" at constant power :
>Em drives mounted on a rotor turning at 2000m/s tangential velocity (not easy but this is the kind of tangential velocity attained in some energy storage flywheels...). Em drives consuming 1kW microwave, radiating some (all ?) of this power as heat and thrusting at 1N : 1N/kW is in the ballpark of what has been experimentally claimed already. This gives 2000m/s * 1N = 2kW mechanical power to the shaft of the rotor. 2kW mechanical power at the shaft are converted to 1800W DC current by a generator (and 200W radiated as heat). Of this 1800W DC electrical power, 250W are diverted for any use we like. To keep it in line with the topic I put it to good use to power another Em drive but really we are free to use those 250W for whatever (creating mass for instance). The power splitter is not 100% efficient, it radiates 50W of power. 1800-250-50 = 1500W to feed the RF amplifier. The RF amplifier wastes (radiates) 500W as heat and pumps 1000W of clean microwave back into the Em drives on the rotor.
>The process needs an initial investment in energy (to make rotor move at 2000m/s tangential velocity) but then this is a free energy generator for all practical purpose. If small variations in efficiency make the rotor lose a bit of velocity, just divert a little more power to the RF amplifier : this is just a regulation problem, there is ample margins to adjust and stabilize around the optimal operating point.

>If this consequence is a feature of the Em drive, great. If this is a problem then the problem rests in the initial hypothesis of "propellantless thrust magnitude at constant power". But we often see by proponents the contradictory position that "of course EM drive respects COE, and somehow at constant power input at some (ill defined) point thrust has to surrender" and that "with that technology we could reach Proxima in less than a century", that later hope being made possible only by breaking COE, that is considering "constant thrust at constant power".
>So either "constant thrust at constant power" is true and this is (apparently) breaking COE.
>Or either "constant thrust at constant power" is not true, COE might be preserved, then we would like to see a not so ill defined formula of thrust=function(power, other objective parameters ?), and short of that at least not be sold deep space mission profile that do presuppose constant thrust at constant power, undercover.

A photon rocket does not have this problem because even at its theoretical maximum thrust per power ratio (which is about 3.336 * 10^-9 N/W), the speed it would have to reach in order to start the violation is the speed of light in vacuum. So, even though it has a constant thrust per power input it will simply never reach the required speed no matter what you do.

But any increase in the thrust/power ratio will decrease the speed to something that can be reached and at 1N/kW that speed is only 1 km/s.

If you are gonna cut and paste from some other forum, please give your own detailed explanation, as to what the hell your point is please.

why would I rewrite something already explained succinctly by someone else? that's illogical.

If you think this GobbleyGook is going to convince anyone of something good luck user !

they directly address points raised in this thread. the EMdrive as described by its inventor allows the creation of a free energy machine. either the EMdrive doesn't work, it doesn't work as described as is nothing but a novelty, or all of physics is wrong.

I'm betting against that last one.

If the EM drive works, Military Industrial Complex black projects probably figured it out and more a long time ago ( where are all those trillions going? )
If it doesn't work then what the fuck is China doing by keep researching it? Somehow trick the US into wasting funds on it even though US doesn't believe it works anyways?