Is EM-drive joke or not?

Is the EM-drive some kind of weapon? That kind of electromagnetic loudspeaker can install on killer satellites. Which mission is to destroy communication or some other important support systems like positioning or recon satellites. The microwave can cause damages to the electronics of other satellites. 

The thing about EM drives is that they are all purely theoretical. And their thrust in sea level is less than one billionth of the regular rockets. They are all hypothetical systems if we are talking about wave-movement-based systems or so-called photon rockets. And their cousins microwave-based EM-drives. The photon rockets are researched from the 1970s and the idea is that only photons can reach the speed of light. 

The fact is that all engines that are introduced here are hypothetical or theoretical. And the photon or other  EM-drive would not ever operate in the atmosphere. The only operational area of those engines would be far away from the atmosphere. 

If we shoot photons in a WARP bubble. They would travel faster than other photons. Same way microwaves can cross the speed of light in WARP-bubble. 

The idea of the EM-drive like photon or microwave engines as the higher-than speed of light thrusters bases the idea of the shoot photons to the WARP bubble. In that case, the photons or microwaves that are traveling in WARP-bubble. Travel faster than the speed of light is outside the WARP bubble. 

A small WARP bubble might be created accidentally by researchers. There is the possibility create the electron-size WARP bubble. And then shooting photons through it. That thing makes it possible that photons travel short moments faster than light. 

The problem with photon rockets is a weak thrust and that system is useful only in the speed that is near the speed of light. The photon rockets are like the microwave engines systems that are planned to use in interstellar flights. So wave-movement-based EM-engines are not suitable even for interplanetary flight. There are three types of photon rockets planned in theoretical research. 

1) So-called non-coherent photon engine which uses the normal photons. That is the system that is normally called a photon rocket. The thrust for that engine can increase by using antimatter. In that case, the annihilation is creating the thrust and photons. That is needed in the last part of acceleration. 

2) The laser-beam or coherent photon engine. That engine uses laser rays. And it can give more thrust than a non-coherent photon engine. The lasers can also use to push things like solar sails. But in this text focus is on the laser engines, which laser is in the craft. 

That system would shoot laser rays. Through the rocket's reaction chamber. That system is planned to use with antimatter engines. The antimatter would react in the combustion chamber. 

That laser ray can use to increase the temperature in the combustion chamber. And it can use along with ion rockets. In that case, ions will travel through the ion accelerator and the laser will increase their energy level. 

And then the laser beam would give the last punch to craft. The laser beam can be used to vaporize some gas. And then it can use to travel between planets. But for interstellar flight, there is needed to use some other device like an antimatter engine. 

3) Microwave engines. Along with microwaves, the thrust of those systems is similar to some free photon engines. But microwaves can use to replace combustion in the combustion chamber. In that case, gas like liquid methane or hydrogen will give the thrust. The EM engine is normally useless. 

But if there is injected vaporizing material. The vaporized gas would give the thrust for that engine. The microwaves can also be used to vaporize silicon or some other solid material for use in ion engines. The ion engines would ionize that vapor and then it can be driven to the magnetic accelerator. 

Is EM engine some kind of microwave weapon? As I wrote at the beginning of this text? The microwave engine can also be a microwave weapon. If some killer satellite would be equipped with microwave cannon which is similar to the so-called EM-drive, that thing can damage the other satellites quite easily. 

https://bigthink.com/starts-with-a-bang/no-warp-bubble/

https://www.extremetech.com/extreme/329631-scientists-havent-created-a-warp-bubble-but-theyre-a-bit-closer-to-testing-one

https://me.ign.com/en/tech/192998/news/scientists-take-a-step-towards-building-a-real-life-warp-drive-by-accident

https://www.nasa.gov/centers/glenn/technology/warp/warp.html

https://www.space.com/can-emdrive-space-propulsion-concept-work

https://www.techtimes.com/articles/265295/20210912/nasa-warp-drive-explained.htm

https://www.techtimes.com/articles/269047/20211207/worlds-first-warp-bubble-discovered-serendipity-darpa-researchers-find-strange.htm

https://en.wikipedia.org/wiki/Alcubierre_drive

https://en.wikipedia.org/wiki/Antimatter

https://en.wikipedia.org/wiki/Antimatter_rocket

https://en.wikipedia.org/wiki/Beam-powered_propulsion

https://en.wikipedia.org/wiki/EmDrive

https://en.wikipedia.org/wiki/Laser_propulsion

https://en.wikipedia.org/wiki/Nuclear_photonic_rocket

https://en.wikipedia.org/wiki/Photon_rocket

The link to PDF files of photon engine:

Image: https://www.businessinsider.com/rocket-lab-launches-photon-satellite-2020-9?r=US&IR=T

Why somebody has drawn that figure to the ice? And the writing about the mysterious EM-drive of NASA.

Why somebody has drawn that figure to the ice? And the writing about the mysterious EM-drive of NASA.

Maybe this is one of the consequences, and that does mean anything, but the image, that is drawn in the ice does look like one of the concept aircraft, which is introduced on the Internet as some kind of study project. So, in my opinion, this image seems like some kind of aerial vehicle, and it is made in purpose.

Are the children made it, and what is the reason, why they have done that kind of thing? Maybe this is only a game, and there is nothing to hide in this case, but those kinds of things are really interesting. Those things are interesting for me, and that's why I took this image. But let's go to think another mysterious thing, what is called as "EM"-drive.

The EM-drive (1)

The idea of "EM-drive".  The idea is to connect the other propellant to the photon rocket. The photons of the photon rocket can be replaced by using some other electromagnetic radiation, like radio- or microwaves. That would allow using another propellant with the photon or some other radiological rocket motor. In this case, the system would boil the propellant and that thing will increase thrust at the lower speed.

Electromagnetic or EM-drive has the same idea with photon motor and the thing is that every kind of electromagnetic radiation has the thrust. But the power of thrust is so weak, that we should accelerate the spacecraft near the speed of light if we would want to use photons as the propellant. That means that the photons would accelerate the craft just in the last period when the craft would reach the speed of 90-99% of the speed of light by using an antimatter drive or something like that.

Only photons can have a specific impulse of the speed of light, but the thrust of the photon rocket is so weak, that the acceleration of the rocket to the near the speed of the light must be done by using some other method. And the photon rocket is an only known system, which can reach the speed, which is near the speed of the light because the rocket cannot cross the speed of the particles, which is going backward.

Of course, there are things like WARP, which are researched, but the thing is that those things are radical, and the only thing, that can send the particles backward by the speed of the light would be photon or radio wave-based rocket motor. And this is the thing, what makes EM-drive so radical.

If we would use microwaves in the EM-drive that thing could use also another propellant like water or hydrogen for giving extra thrust. That thing would make possible to accelerate the speed of the spacecraft also by using some other propellant, and then the craft would be pushed to the speed of light by using micro- or radio waves.

(1)
https://www.nationalgeographic.com/news/2018/05/nasa-emdrive-impossible-physics-independent-tests-magnetic-space-science/