The obvious solution is to engineer an EM drive that has enough force to make these effects small in comparison. 
Paging Mr Musk! Paging Mr Musk! It's time for the BF-EMdrive™!
I was informed earlier that Jakub Jedrezejewski's emdrive group from Poland has won the E(x)plory competition yesterday. In May next year they will go to Intel Isef in Pittsburgh. I'm not sure exactly of their results but he tells me he will be posting to NSF soon. I have been advising them on their RF equipment, so they are using the same amplifier, circulator, attenuator, and signal generator I use. Here is a picture of their experiment.
Oh yeah, Jakub Jędrzejewski and Michał Zwierz. Very talented young guys from Poland.
I was curious how they're going. Here's a quick video in which they're talking about their inventions (fluency in Polish's required). You can see the Em-drive in the background Glad they've won the competition and I guess they'll have an opportunity to share their findings at Poland 2.0 Summit at Imperial College London. Can't wait to see what they've got.
Oh yeah, Jakub Jędrzejewski and Michał Zwierz. Very talented young guys from Poland.
I was curious how they're going. Here's a quick video in which they're talking about their inventions (fluency in Polish's required). You can see the Em-drive in the background Glad they've won the competition and I guess they'll have an opportunity to share their findings at Poland 2.0 Summit at Imperial College London. Can't wait to see what they've got.
Definitely see the cavity right between them and behind them. Took a minute to spot. It's the same as the image two posts above but rotated. What the hell are they saying?
Got this much from the Google translation of the video description.
Microwave Resonant Cavity Thruster (MRCT), 18-year-old microwave engine, Technical College in Ostrow Wielkopolski Scientific Supervisor: Paweł Sobczak, PhD Our motto: "Motivation for our work together are dreams and fascinations with physics, mechanics and everything I associate with broadly understood By Paulo Coelho The construction of our microwave engine is similar to the construction of a motor. EmerRive's Roger Shawyer is an innovative motor that can operate in a vacuum, powered solely by electric power. Dimensions are designed to make a difference The engine will produce a string of hundreds of milliseconds (mN), which on Earth is not a significant value, but in space can be successfully used to correct the motion of the satellites. Who or what inspired you to implement an innovative project? We have created many amazing projects before, now we have decided to raise the bar. We have stopped working on our projects and have joined forces to build an engine whose principle of operation has been a mystery for scientists since 2000. We want to continue to develop our own passions and skills, it would be impossible if we did not start a project that is completely alien to us, with every project we make we want to know more and be better at what we do. Describe your plans for the future. Michał graduated with a degree in automatics and robotics at the University of Mining and Metallurgy in Cracow, and Jakub is in 3rd class of the Technical School in Ostrów Wielkopolski and thinks about studying abroad. On the occasion of this project we noticed that our cooperation is very well and we would like to continue it in the future, we think about our own company that would combine mechanical, automation and physics. We are fascinated by science and we want to combine our own passions with business. Why is the title of "Innovator of Tomorrow" right for you? Our projects are very high quality. Moreover, we create them from scratch themselves, of course we use the funding of various companies or engineers, but each of our projects was our idea and from the beginning to the end made according to our projects. Each of our projects has something new, innovative, we do not copy anyone else's solutions - we create better solutions. Our common dream is to shape the environment in which we live, so we want our projects to be applied in practice: from wheelchairs, through automation elements to microwave motors, we do everything in our own discretion, according to our own ideas. You can say that we are insolent because we face those who look at us say that what we do is impossible.
....What the hell are they saying?
I think it ends with "Let's go out for a few tankards of Żywiec Porter." Congratulations on the win!
Looks to be based on Roger's Demonstrator EmDrive.
Even has the short constant diameter section at the big end, which in the Demonstrator is 1/4 guide wave long. Not knowing the freq, it also seems the small end constant diameter section is 1/4 the guide wave length at that end. This tuned constant diameter section allows the use of flat end plates to form high Q cavities.
This technique was also used by Prof Yang.
I was informed earlier that Jakub Jedrezejewski's emdrive group from Poland has won the E(x)plory competition yesterday. In May next year they will go to Intel Isef in Pittsburgh. I'm not sure exactly of their results but he tells me he will be posting to NSF soon. I have been advising them on their RF equipment, so they are using the same amplifier, circulator, attenuator, and signal generator I use. Here is a picture of their experiment.
Nice and simply balance beam test rig, as Roger used in the Experimental EmDrive tests.
Battery powered plus the EmDrive appears to have the ability to be tuned to desired resonance freq via an adjuster at the small end. Which Roger did as well.
https://www.crazynauka.pl/explory-2017-znamy-juz-zwyciezcow-tego-konkursu-naukowego/
Jakub Jędrzejewski and Michał Zwierz , pupils from the Technical School Complex in Ostrów Wielkopolski, who built a microwave powered electric motor, won this year's E (x) competition.
This innovative machine can operate in a vacuum and is powered exclusively by electricity.
The engine is supposed to produce a string of hundreds of millinewtons mN), which on Earth is not a significant value, but in space can be successfully used to correct the motion of the satellites.
If the measured thrust was +100mN, this is going to be very interesting.
If the measured thrust was +100mN, this is going to be very interesting.
Definitely. If it is 100mN, it is not Lorentz Force. I will be interested in reading their report. I wish their force was not the slow type.
This article has an interesting derivation of a relativistic, constant acceleration rocket using SR. I didn't find any over-unity paradoxes, but I did find a typo on eq. (12b), "D should be C". It doesn't cause any issues.
http://www.jbis.org.uk/paper.php?p=2017.70.213Performance Predictions for Interstellar Missions Using the Special Theory of RelativityB. Cassenti et al. (2017), JBIS, 70, pp.213-218
Refcode: 2017.70.213
Keywords: Relativistic flight, velocity parameter
Abstract:
Interstellar missions that use exotic propulsion systems, including for example, antimatter propulsion, photon propulsion, and the interstellar ramjet can require the consideration of highly relativistic speeds. Obtaining estimates for performance requirements then becomes complex. There are though methods that can greatly simplify the mathematics. For example, replacing the velocity with an abstract parameter, the velocity parameter, can greatly simplify the calculations. This paper derives the appropriate equations directly from Special Relativity and shows that only Special Relativity is needed. The calculations are not difficult to preform and produce exact results. Examples examined include: constant acceleration rocket and variable thrust rocket.
I don't have a PDF to share, I have a hard copy journal.
Found 3 more images of Jakub's EmDrive, which originally used an end plate mounted magnetron, as Dave had done.
Doing that is hard hard on the magnetron as all the reflected Rf energy from a high Q cavity is feed back into the magnetron, resulting in overheating and a quick death.
Google translate error:
According to Google translate miliniutonów = miliseconds. However niutonów is Polish for Newtons, so miliniutonów = milinewtons and not miliseconds
Corrected translation:
The construction of our microwave engine is similar to Roger Shawyer's EmDrive engine.
It is an innovative engine that can operate in a vacuum.
Powered solely by electricity.
The main part of the engine is a fringed conical cavity made of aluminum sheet to which microwaves are fed.
It is characterized by high quality, its dimensions are designed to provide resonance.
The engine will produce a sequence of hundreds of milinewtons (mN), which on Earth is not a significant value, but in space can be successfully used to correct the motion of the satellites.
The last image also shows the interior of the EM drive. The internal alu surface doesn't look to be highly polished...
The last image also shows the interior of the EM drive. The internal alu surface doesn't look to be highly polished...
Claim is the cavity has a high quality or high Q. The measured Q, forward power and thrust will help to tell the tale.
Have emailed Jakub asking for more info.
Suggest what we can see of the inside is not the inside wall but the outside of some sort of adapter that is sitting in the end of the small end constant diameter wave guide.
The main body of their EM drive seems to be an existing , commercial available piece. The surface of the element looks smooth, but not polished.
So, it doesn't look like it is a "simple" sand molded casting, as then the surface would be more granulated.
It looks to be made as a high pressure injection mold piece, a typical high volume industrial process....
But I could be wrong ofc...
https://www.crazynauka.pl/explory-2017-znamy-juz-zwyciezcow-tego-konkursu-naukowego/
Jakub Jędrzejewski and Michał Zwierz , pupils from the Technical School Complex in Ostrów Wielkopolski, who built a microwave powered electric motor, won this year's E (x) competition.
This innovative machine can operate in a vacuum and is powered exclusively by electricity.
The engine is supposed to produce a string of hundreds of millinewtons mN), which on Earth is not a significant value, but in space can be successfully used to correct the motion of the satellites.
If the measured thrust was +100mN, this is going to be very interesting.
Unfortunately we don't even know whether they got any thrust or no thrust whatsoever. What the video description reads is "The thruster will generate a thrust of the order of hundreds of millinewtons" Maybe they got something, but that's not what description implies.
edit:
and BTW
18-year-old microwave engine
No, this is not about 18-year-old engine, it's actually about
18 y.o. GUYS, which is kind of amazing
The main body of their EM drive seems to be an existing , commercial available piece.
Link?
Hi TheTraveller. I think I recall someone or Roger himself saying Roger thinks that before the end of 2017 he expects to have a superconducting Emdrive to demonstrate. If that recollection was right, have you heard any news relating to it?
