Do you think this Idea is possible?
Thank you
It is simillar to EmDrive.
$\begingroup$$\endgroup$
5
- $\begingroup$It's hard to tell what exactly is the proposed mode of action. You'd have to explain your idea in a lot more detail, but if it does not involve ejecting any sort of reaction mass, it violates the conservation of momentum, so please explain how that problem is addressed.$\endgroup$– TooTeaCommentedApr 4 at 9:04
- 1$\begingroup$Please ensure all text in posted photos is readable, and also see the 'experimental errors' section of the linked page - if this design is 'similar' it would also have the same errors.$\endgroup$– GremlinWrangerCommentedApr 4 at 9:09
- $\begingroup$related: Why is the "impossible" space drive impossible? and Could the helical engine work?.$\endgroup$– uhohCommentedApr 4 at 11:56
- $\begingroup$I was enthusiastic about maybe saying it's great, but I can't read it.$\endgroup$– Miss UnderstandsCommentedApr 4 at 13:12
- $\begingroup$You say the force created by the solenoid's field on the plate will move the craft forward, but you forgot the force created by the plate's field on the solenoid, which is, of course, equal and opposite. One can imagine any number of space propulsion devices as long as one forgets the reaction force. If you can build one of these, though, I encourage you to build it and see what happens - don't let words on a screen get in the way of real experimental physics.$\endgroup$– Stack Exchange Broke The LawCommentedApr 4 at 21:45
Add a comment |
2 Answers
$\begingroup$
$\endgroup$
No
There will be forces between the two coils but if they are bolted to the rocket the forces just apply a tension/compression to the structure. If one of the coils is jettisoned it is possible to generate force via F=MA by repelling it, but then you have only one coil.
Using conventional physics you need to throw mass out the back to generate thrust.
You can skirt the edges withPhotons but otherwise if there is not mass going out the back you are not making thrust.
Note that one of the reasons the EM drive attracted attention is that for it to work there HAD to be some new physics involved. And further investigation appeared to indicate it was an electromagnet interacting with Earth's magnetic field in a conventional way producing the apparent thrust numbers.
answered Apr 4 at 9:03
$\begingroup$
1I think what you're indicating here in the drawing is that the magnets are "pushing" on the yellow plates to produce forward thrust while being separated far enough to have negligible effects on each other.
Unfortunately, whatever the source of the "push" is, you're recreating the famous Road Runner gag:
If the magnetic field puts a force on the yellow plate, it also causes and equal and opposite force on the magnetic coil itself, and since the coil is bolted to the frame of the vehicle, you're creating tension in the frame instead of forward thrust. You might as well try to lift yourself out of the mud by pulling up on your own boot-straps, or make a car go by having the driver push on the steering wheel really hard.
$\endgroup$
- 3$\begingroup$Technically with a curved sail, you actually can propel yourself forwards with a fan blowing in the direction of travel, it’s just going to be worse than turning the fan around to blow away from the direction of travel. Conceptually similar to thrust reversers on airplanes but in reverse. Not disagreeing with your answer, but a minor point of interest$\endgroup$CommentedApr 4 at 17:18
