Profil: @joncard :: Wykop.pl

Buduję w domu eksperymentalny napęd statków kosmicznych EmDrive – AMA!

Istnieje nowy typ kosmicznego silnika nazywany EmDrive, który skonsternował naukowców na całym świecie. Zbieram fundusze na stronie buildanemdrive.org, żeby wysłać taki silnik na orbitę ziemską, w celu zweryfikowania czy naprawdę będzie działał.

z dodany: 27.12.2016, 17:00:01

joncard 27.12.2016, 17:00:01

74

Istnieje nowy typ kosmicznego silnika nazywany EmDrive, który skonsternował naukowców na całym
świecie. Zbieram fundusze na stronie http://www.buildanemdrive.org, żeby wysłać taki silnik na orbitę, w
celu zweryfikowania czy naprawdę będzie działał.

FYI: istnieją śmieszne zasady dotyczące tego ile można powiedzieć o takich rzeczach dla obywateli spoza
USA. Dołożę wszelkich starań, aby powiedzieć najwięcej ile

joncard 27.12.2016, 17:04:35

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@WiadroPoSkrobance: China claims to have just done a test in space, but NASA's tests were in Houston, TX.

joncard 27.12.2016, 17:05:48

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@joncard: I think it's important to do the experiment in space itself to limit the possiblity that it is the testing equipment. One friend of mine in aerospace believes the thrust comes from magnetic interference in the wiring because the power levels are so high.

joncard 27.12.2016, 17:06:56

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@tomekamila: I don't make anything from this project, I can only contribute some from my paycheck from my day job. The only way I expect to make money from this is if I get a grant from someone like NASA; then I'd consider taking a salary from that.

joncard 27.12.2016, 17:11:47

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@Kulek1981: I saw that. I am very excited to see it. It will definitely cause people to want a verification; there are a lot of people that do not trust the Chinese space program as it is very secretive.

joncard 27.12.2016, 17:13:21

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@krzychu3: I am planning on a 3U CubeSat, though it is looking like it will go up to 6U because of the temperature management. It's not really clear yet; my current budget should cover either one, though if it goes up to 6U I will have to take a different, more difficult launch option.

joncard 27.12.2016, 17:19:59

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@Jossarian: I do not have a lot of experience with e & m, Which is why I am going slowly. I am building up a collection of sensors and safety equipment, like I recently finished building a Faraday cage is to the experiments in. I am also working with a lot of electrical engineers That also work in my makerspace where I am doing the work.

Lack of experience is

joncard 27.12.2016, 17:21:30

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@mirkometr: I would not be surprised. One of the things that I have struggled with is, when I try to go the public for funding, they say, "that can't work." When I talk to some seasoned professionals, they say, "Oh, I saw that work back in the 80's; of course it works."

joncard 27.12.2016, 17:23:23

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@krzychu3: Yes. The details of it are not fully worked out; I want to get a working frustum first, but my expectation is at least 2 reaction wheels to stop a tumble. Possibly a magnetorquer instead; the reaction time doesn't need to be fast. It just needs to stop a tumble before turning on the drive so that thrust can be detected.

joncard 27.12.2016, 17:24:13

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@Zashi: Fair point. :) I don't know how to do the verification, but here's the picture I took.

joncard - @Zashi: Fair point. :) I don't know how to do the verification, but here's ... — źródło: comment_DNLKRiD2Iwg54YKLxQOG7MdxyYZyBR0A.jpg
Pobierz

joncard 27.12.2016, 17:26:05

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And my Twitter profile. https://twitter.com/JonathanCard

joncard 27.12.2016, 17:34:22

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@Kontestator: There are several numerical models. Unfortunately, they don't agree with each other. :) Roger Shawyer, the inventor, published one here: http://emdrive.com/theory.html and a theorist named Dr. Michael McCulloch has another based on his idea of how inertia works: https://www.plymouth.ac.uk/staff/mike-mcculloch
The NASA team at Eagleworks hasn't put forward a numerical model, but they have proposed a physical explanation that isn't really compatible with either of those.

joncard 27.12.2016, 17:35:34

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@Zashi: :) I use the metric system when I can, but it's difficult to get parts in metric in the United States. Sites like mcmaster.com and mouser.com don't usually stock metric parts, so I'm constantly going back and forth because I hate working in fractions.

joncard 27.12.2016, 17:40:26

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@Zashi: Weird fact, Fahrenheit is based on the freezing point of salt water in the bay near the inventor's house, and the body temperature of a cow, taken rectally. Do with that as you will, but not entirely arbitrary.

joncard 27.12.2016, 17:48:46

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@dzikiknur: We're getting towards the kind of thing that I'm not sure about with regards to regulations for exporting arms. The US government considers anything space related to be a weapon, so I'm trying to stick to published stuff. There isn't much to see, anyway. I have one cavity that I have gotten a resonance in, and I am working on the tools and things I need to do a

joncard 27.12.2016, 17:50:32

0

@dzikiknur: How that plays into doing the project open-source on the Internet, I do not really know. But even if they would show me grace on my site, I am sure they would not be happy about doing too much on a Polish website.

joncard 27.12.2016, 18:03:25

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@dzikiknur: The second generation is very interesting, and I have looked into how much and how difficult YBCO is to machine, but I do not think I am up to it.

I have a degree in Computer Science and most of my career has been in computers, but I served for a while as Treasurer and then Executive Director of the Space Frontier Foundation, a group that advocates for space

joncard 27.12.2016, 18:05:46

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@6a6b6c: I am not aware that they have plans to do it. I have spoken with a former NASA center head and he said he was interested in launching one just to see if it would work and he couldn't get the science teams to agree to work on it. Eagleworks is a bit outside of normal NASA channels, and I don't know if they have plans to launch one

joncard 27.12.2016, 18:09:29

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@brylant_brylant: I disagree, obviously. There are lots of things that have been discovered or worked on by individuals, and the engineering and machining of an EMDrive is really pretty easy to do, relatively speaking. That's one of the reasons that I am working on it instead of something like the Woodward Effect, which looks really hard to make.

I think you will also be surprised at how human people are

joncard 27.12.2016, 18:15:01

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@schwanz: I do not have a lot of experience building satellites myself, but I have worked with people who do have that experience for years. I am making sure with them that what I am doing makes sense and can work.

I expect to put in accelerometers to detect spin or tumble, something to correct that (either reaction wheels or a magnetorquer) and a control board that I have not

joncard 27.12.2016, 18:15:32

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@grg79: Never been a big fan of the Prime Directive.

joncard 27.12.2016, 18:16:37

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@Norwag93: I actually did contact Burke Fort, the head of the SpaceX Foundation. I used to do some volunteer work for him a few years ago. He gave me some good advice. Maybe I will give him another call now that the Chinese have made it work in space.

joncard 27.12.2016, 18:19:09

1

@brylant_brylant: I think it is better than you would think, but then you said I was too optimistic. My biggest worry is being shaken apart during launch. I am sure I can test the electronics in high radiation before launching (somewhere around MIT there must be a nuclear reactor, right?) and keeping a little heat on doesn't seem to hard. And I have the benefit of knowing people at companies

joncard 27.12.2016, 18:31:30

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@Atexor: The question of "does it work?" and "how does it work?" are extremely different questions that a lot of people are getting confused right now. The recent Eagleworks paper suggests that it does work. It is impossible to be sure until the experiment is run in space with no testing equipment around to interfere with it.

The question of "how does it work?" is much more complicated. There are

joncard 27.12.2016, 18:36:06

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@dzikiknur: I expect, if everything goes well, about 10 mN of force, which is about the weight of a popcorn kernel in Earth gravity. The most reliable way of measuring it, to my mind, is to partner with a radio telescope or something like that and measure the doppler effect as it accelerates. This means the thrust has to be more than a certain amount (that I forget right now)

joncard 27.12.2016, 18:41:27

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@LukaszLamza: I think you are exactly right. I am not trying to get too involved with any particular theory. What I want to know is "does it work?" I suspect that even if I knew how it worked, I could not convince anyone because I do not have the right degrees and work place.

Yes, McCulloch is pretty fringe. There is just something nagging at me that this is such

joncard 27.12.2016, 18:43:50

1

@dzikiknur: No, I don't think it will be enough. Solar power in space is about 1.3 kW / sq. meter, which is a lot of solar panel for a satellite in the form factor I am intending to work with. I am planning on a LiPo battery, which should be able to deliver 800 W at maximum discharge rate. I "just" need to figure out how to make it AC

joncard 27.12.2016, 18:44:52

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@LGxxx: I am sorry. I only know English. A volunteer for the organization suggested there were people interested here, so I am doing my best with Chrome and Google Translate.

joncard 27.12.2016, 18:46:27

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@MagicznyHubert: The fundamental rule of science is "believe what you see more than what you think." At least, I think it is. It is fine to say, "it works here on Earth", but what about all the things you did not know were affecting it by being in Houston, TX? If we do not try it in space, we can never really know if it works in space.

joncard 27.12.2016, 18:49:04

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@kwanty: A company called NanoRacks has a list price of $80,000 / U to launch a CubeSat from the International Space Station. I would prefer this, because I would expect there is a lot more support for communicating and working with that orbit and nearby ones. However, there are other estimates that put the cost at $40,000 / U if you go as a secondary payload to another satellite. I

joncard 27.12.2016, 18:49:53

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@LGxxx: How much are you donating? :)

joncard 27.12.2016, 18:56:33

1

@LukaszLamza: I have no opinion on how it works. I am trying to consider all theories and checking each design against all of them. When I get to producing thrust, I will be able to compare what I am getting to what each thing predicted, and we will see.

1. The shape does seem to matter. I am not sure why the shape matters in the NASA Eagleworks theory, but

joncard 27.12.2016, 18:57:46

0

@osters: I am very interested to see it work. I am not sure I understand Mr. Shawyer's explanation of it, but it does seem as if it would work much better. Working with YBCO and liquid nitrogen is a bit more than I can take on for this version of the project, though.

joncard 27.12.2016, 18:58:30

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@kvvach: My goal is to ply the stars in a tramp steamer in space. I have no objection to a Polish crew.

joncard 27.12.2016, 19:02:42

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Hope I am not disappointing! I have some experience with it. Starting simple, I looked at Arduino first, and worked up (so far) to a Raspberry Pi. One thing that I am experimenting with is using a Hadoop cluster on multiple Raspberry Pis, combined into a single board, to try to provide some redundancy. One big problem in high radiation environments is that electronics will have segmentation faults regularly. A friend who

joncard 27.12.2016, 19:06:28

0

@guilmonn: There's always some water, and there's always some pressure. And if I leave a hole to ventilate it, then moisture and air can get in. It is a serious problem. My intention now is to leave it ventilated to the outside, and seal the electronics in plastic, like those cheap toys to come in vacuum formed packaging. I can't remember the name of it, but it can be done.

joncard 27.12.2016, 19:07:37

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@LGxxx: My current estimate is $300,000 will get the whole job finished and launched.

joncard 27.12.2016, 19:12:06

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@LukaszLamza: It is definitely easier than a rocket or experimenting with the Woodward effect. Right now, the most expensive thing is buying copper and steel (which I use for the forms to bend the copper around).

I don't THINK that the source needs to be tightly placed. I think the resonance characteristics of the chamber will fix most problems. But, yes, the walls need to be much smoother than I

joncard 27.12.2016, 19:15:50

-1

@dzikiknur: That's definitely the problem. The best I can do with any kind of attainable budget is this: the ride to the ISS has a pressurized compartment; I want to go in there. The ISS is room temperature. Once it is launched, My hope is to be able to run a small heater until it is ready to try activating it. Once it's on, there will be no problems with

joncard 27.12.2016, 19:16:20

2

@osters: I have no news, unfortunately. I am not in touch with Mr. Shawyer.

joncard 27.12.2016, 19:16:40

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Hmm, to ja może się przywitam.

@lukaslm: yes, you can.

joncard 27.12.2016, 19:18:27

1

@QBA__: I am looking at using a LiPo battery right now, like is used in drones. I'm not totally sure that will work; a friend of mine took one apart (strongly not recommended for people that want to keep all of their fingers) and I think there is a lot of liquid inside. I will need to see if it can survive vacuum and what its lowest temperature can be,

joncard 27.12.2016, 19:19:25

2

@donn_pedro: Right now, it's just me. I work in a makerspace called the Artisan's Asylum, which is like a communal machine shop. There are a lot of very good engineers here, since I'm in Boston, so when I have questions I can find answers. I could not do it otherwise.

joncard 27.12.2016, 19:21:46

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@PranieMuzgu: Not many formal qualifications in the field. A couple of articles on space-related, but not engineering, subjects. I have been volunteering and working in aerospace advocacy, and my background is in engineering (Computer Science), so I know a lot of the practical considerations of satellite building and have a pretty deep bench of resources to ask for help when I need it. I work in a place called the

joncard 27.12.2016, 19:23:29

3

@HHSbits: The introduction was written by a volunteer with the organization. Unfortunately, I was not able to arrange for a translator other than Google Translator today. I will try for more support if I do this again.

joncard 27.12.2016, 19:24:16

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@zyciejedo: A volunteer suggested you would be interested. I expect I will do a Reddit AMA soon, as well.

joncard 27.12.2016, 19:26:31

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@Phallusimpudicus: No, they aren't silly. I am not sure if I can make it better, but I do know some of the scientific organizations that have made them were not focused on getting the most possible thrust they could. I think I am going to have to, so maybe I will make it better.

I do want to do things with this engine. The first step, though, is to convince

joncard 27.12.2016, 19:28:32

3

@gleorn: I would absolutely welcome any volunteers. I am trying to get the code on Github.com and working with Autodesk Fusion 360 to make the hardware editable in collaboration. I am willing to use any funds I raise to fund other groups that are closer to launch than I am, and I am willing to bring on people that are interested. I am well aware that the project is moving

joncard 27.12.2016, 19:29:58

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@marcin_net: I am very excited about the Chinese test in orbit. I do not know how much that is going to convince people in the US; there are a lot of people that do not trust the Chinese space program. They think it is too secretive and suspect they may be lying. It does not seem likely to me, but that is the worry.

joncard 27.12.2016, 19:31:45

0

@dzikiknur: I am hoping it will be enough. Maybe I can put it on one of those paint stirring machines.

joncard 27.12.2016, 19:35:38

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@QBA__: You are definitely right about that.The biggest issue I have is that, in order to "tune" the chamber, there needs to be something capable of a Fourier transform, pretty fast and in real time. If I work with a Hadoop cluster of Raspberry Pis, then most will be on most of the time, and I will be able to distribute the work load. FFT has not been implemented as

joncard 27.12.2016, 19:37:45

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@guilmonn: Yes, I believe so. There are some forms of epoxy and other things that can do this.

joncard 27.12.2016, 19:44:37

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@lord_mln: I believe that I have seen this before, so I'm going to reply while it is still playing. I have no idea. One of the concerns people have is that the hot air in the chamber could be providing buoyancy (think worst hot air balloon ever). This is definitely happening, it just doesn't seem to be all of the thrust we have seen. So, is he seeing thermal buoyancy?

joncard 27.12.2016, 19:47:57

5

@ale_fuks: I do not know of any upper limit on the frequency. I do know that building the cavity in a frustum shape would be extremely difficult in the visible light range; it would possibly require building it into the crystal structure of a some mineral (the crystal that creates laser light is basically a resonance cavity that is made of a crystal instead of fabricated by hand). Dr. McCulloch

joncard 27.12.2016, 19:52:34

0

@kwanty: The thrust is in the range of 10 mN/kW, so substantial power would be required to produce enough acceleration to detect it from Earth, which is something I want to do. This would mean very large solar panels (the average solar flux is about 1.3 kW per square meter, less panel inefficiencies, etc) and also complex charging circuits that I did not think were worth spending time on. If

joncard 27.12.2016, 19:52:58

0

@ale_fuks: I hadn't heard that. Very interesting.

joncard 27.12.2016, 19:53:17

1

@Aryo: I will look at that for next time.

joncard 27.12.2016, 19:58:44

1

@scalony: 1. I am planning on using the amateur frequency bands for communication back and forth, and I would like to either contribute to or utilize SatNOGS (https://satnogs.org/), but I am not sure yet.

2. Just one, I think. There is not a lot of room for more.
3. Extensive redundancy in the control systems and electronics. Possibly too much. :) I am experimenting with a version of multiple

joncard 27.12.2016, 20:00:41

3

@lpkm: My goal is to use the amateur radio bands and either contribute or leverage SatNOGS (https://satnogs.org/) to handle communication. I want to have two-way communication to get telemetry out and to send commands in. I haven't looked up latency, but I don't think it's much. It's only 200 miles or so to the ISS, when it is overhead.

joncard 27.12.2016, 20:08:03

3

@ale_fuks: I do not think it is "dead" per se, but the Eagleworks team did a great deal of work with magentic suppression to try to rule this out. I will have to look again to see how much this explained or didn't explain, but in the end it will matter, but not much to me. One of the biggest things we can use it for in the next 5

joncard 27.12.2016, 20:17:26

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@lord_mln: Oh, this one I have not seen! That's really great.

joncard 27.12.2016, 20:28:09

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@Grzesiek_astronaut: Fairly easy, compared to most projects like this. Easier than a rocket, which is like plumbing which explodes, and the Woodward Effect stuff, which I imagine will require tuning specific LC circuits to individual resonating crystals. I'm learning metal spinning/spin forming/whatever you call it, and it ends up pretty straightforward to make new cavities. What's holding things up is just 1. Copper is expensive, and 2. I'm insisting on

joncard 27.12.2016, 20:32:44

2

@NoComments: It is just a matter of trying. There are a few models that are proposing how it works, and there is usually something in the model that indicates how to make it better. So far, they do not disagree what would make it better: make the big end bigger and the small end as small as you can without breaking it, and polish the sides as much as possible.

joncard 27.12.2016, 20:34:20

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@NoComments: So far, it is not believed in enough for any groups to make a commercial venture based on it. I am hoping that my project will help put that aside and we can see what happens next.

joncard 27.12.2016, 20:38:17

1

@Bergkamp: It will happen when it happens. Or it won't. I generally just say, let's take it one step at a time, and I think this is a good next step. Maybe not helpful.

joncard 27.12.2016, 20:45:40

2

@scalony: Absolutely true. My main concern for selecting a frequency was just that it was widely used in common devices, from Wi-Fi to microwave ovens. It makes it easier to work with the more standardized it is, and 6.1cm fit inside the CubeSat standard. The design moved out from there.

joncard 27.12.2016, 20:46:27

2

@Bergkamp: That could be true, but the drive technology is what I can work on. :)

joncard 27.12.2016, 20:55:55

1

@joncard: I don't really know where else to put this, but thank you all so much for your hospitality. I am going to log off now, but I will try to answer any further questions people post here later at a later date. Please consider donating the project at https://www.buildanemdrive.org.

joncard 28.12.2016, 20:49:36

1

@kwanty: I will check that out. Thanks.

joncard 28.12.2016, 20:52:28

2

@boltzmann: A volunteer with the project suggested it. Polish speaker, I believe. He said you all might be interested, so here we are.

joncard 28.12.2016, 20:55:06

0

@pierzak: I have been trying to get talks going to test it aboard the space station first; it's a matter of where I can get funding or grants. That sounds like a good setup to put on the station itself.

joncard 28.12.2016, 21:17:27

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@medevacs: I am not sure. The law is pretty vague, probably intentionally. Im sticking to published stuff in this AMA, and speculation or plans, but staying away from actual pictures of what I'm doing right now. Maybe it's not necessary, but that's what I'm trying to do.

joncard 28.12.2016, 21:23:23

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@Pikantny: :) I'm sure that's true, but it's best to check in with him and ask for things, then to wait for him to call me and offer it.

joncard 28.12.2016, 21:27:53

1

@wrecekrzepki: I've seen that one. I try not to rule anything out, but I have a few questions about it. The trouble is that the EMDrive performs better than shining a laser in a focused direction, so it seems unlikely that further filtering the photons so that only the ones that strike the plate in perfect opposite phases would perform even better than that. It's just a guess, but there's

joncard 28.12.2016, 21:28:38

0

@wrecekrzepki: I've seen that one. I try not to rule anything out, but I have a few questions about it. The trouble is that the EMDrive performs better than shining a laser in a focused direction, so it seems unlikely that further filtering the photons so that only the ones that strike the plate in perfect opposite phases would perform even better than that. It's just a guess, but there's

joncard 28.12.2016, 21:30:29

3

@harrible: Thanks. I was, indeed, that sort of student, but I'm trying to get better.

joncard 28.12.2016, 21:32:24

1

@Darkejas: Could be. I'm just tackling one problem at a time. I do not know much about that stuff.

joncard 28.12.2016, 21:34:46

2

@Wunderwafel: I have been at this for a while. So far, I haven't given the fundraising focus it deserves, so it hasn't raised much. A volunteer suggested this site had people interested in this, so I was happy to do this.

joncard 29.12.2016, 04:57:04

1

@joncard: A few people have suggested I post more information on how to donate, which would probably be useful. I added a donation link to the homepage, and you can donate here: https://www.buildanemdrive.org/donate

joncard 27.12.2016, 17:03:52

211

AMA z Amerykaninem, który chce wysłać rewolucyjny napęd EmDrive w kosmos.
AMA with an American who wants to send a revolutionary engine EmDrive into
space:

http://www.wykop.pl/link/3523043/buduje-w-domu-eksperymentalny-naped-statkow-kosmicznych-emdrive-ama/

#

27.12.2016, 21:08:52

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@joncard: Ja bym wolała przeczytać AMA z nim jak już ten napęd wyśle, najlepiej jak ten napęd już tam się znajdzie.

Psychopathy_Red

27.12.2016, 23:11:32

6

@joncard: Nice (sorry for my english)

Jonathan Card

I am the founder of www.buildanemdrive.org, an organization that wants to put an EM Drive device into space to see if it will work.
Boston, MA, USA
https://www.buildanemdrive.org
jcard@buildanemdrive.org
X (dawny Twitter)

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