Timeline for How to measure thrust of experimental ion engine
Current License: CC BY-SA 4.0
16 events
| when toggle format | what | by | license | comment | |
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| Jul 4, 2021 at 18:37 | history | edited | MyTwoCents | CC BY-SA 4.0 |
Link down, changed!
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| Jul 4, 2021 at 18:36 | comment | added | MyTwoCents | arc.aiaa.org/doi/10.2514/1.B35564 researchgate.net/publication/… | |
| Jun 20, 2021 at 15:43 | comment | added | Ricardo Casimiro | the link is down, does anyone have the name of the paper? | |
| Mar 11, 2019 at 22:20 | comment | added | Vegeta sama | Thank you so much for your help. BUT I just want to let you know if you look closely to the shell's interior you would see two small metal pipes and my teacher told me that they transfer fluid and electricity but after he told me that that they can melt under high voltage (thing that I would like to know if it is alwalys true) I wonder (since they can't be replaced unless you use another vacuum chamber) if it is possible somehow to protect them from melting if it is not I would be thankful if you could give me the links for suitable gadget for the experience online and so sorry to be a pain. | |
| Mar 10, 2019 at 21:19 | comment | added | MyTwoCents | About Electric connections, YES they are lethal, so be careful, always use shielded cables and don't touch anything that's bare. Every cable has current rating of it's own, you can check it online, if it's not enough you can simply use different guage. Typical microwave transformer outputs anywhere from 1200~2000VAC, and less than 1 Amp. So as long as you have something that can carry 1200 Watts(2000V, 1Amp), it should be pretty safe setup. That should solve that problem. Without knowing the exact details I can't pinpoint exact wire gauge to use. | |
| Mar 10, 2019 at 21:12 | comment | added | MyTwoCents | So the vacuum chamber shell(my understanding≈thickness) is designed to hold the vacuum against the atmospheric pressure outside. If that one works fine with nothing in, it should work with something inside. But I doubt the size is enough, you need a bigger vacuum tank, you can still use that pump. You can make one easily with thick clear acrylic sheets, there are lot of videos on YouTube. | |
| Mar 10, 2019 at 11:01 | comment | added | Vegeta sama | So sorry here you go imgur.com/gallery/Ow3XYQm | |
| Mar 7, 2019 at 10:13 | comment | added | MyTwoCents | Can't access the photos, can you upload the photos on imgur.com or at least make files from your drive public? | |
| Mar 6, 2019 at 20:37 | comment | added | Vegeta sama | And drive.google.com/file/d/1bZ3ZBjkogQ2DmRCAsRI7E6vDBRbmqHmW/… | |
| Mar 6, 2019 at 20:36 | comment | added | Vegeta sama | Hi sorry To bother you but I really need your help.So while talking with my teacher about the things we need for the project. He thinks that we can't do it because the high voltage power supply first of all is lethal second (and this what matters for me) the vacuum chamber's shell is small and can't contain the engine and the pipes that transfers electricity would melt under the high voltage here are 2 pictures of the vacuum chamber and if there is a way to overcome those problems I would be very grateful drive.google.com/file/d/1e0ow8Nl1H70DWbsgcNDvQc3PQheBbq8t/… | |
| Feb 7, 2019 at 23:48 | comment | added | MyTwoCents | There is something called vacuum feedthroughs, you can buy it directly or make yourself, if you want to jingle jangle it you can make a hole pass the cable and pour silicon over the hole from both sides, sealing the vacuum inside!! Similar way you can pass the cables for sensor, make sure you make keep some distance between the power cables(put it through another hole) so as to avoid electronic interference with power cable. Try to get shielded cables. Don't hesitate to ask any more questions, I am here to help. | |
| Feb 7, 2019 at 16:25 | comment | added | Vegeta sama | Thank you but The bigger problem in this case is how to make measurement inside the tank. Because first of all the engine needs to be connected to the power supply and I can't imagine how can we connect the power supply to a power source and at the same time have our engine inside the tank. | |
| Feb 7, 2019 at 15:37 | comment | added | MyTwoCents | As already mentioned earlier, try reading that paper it lists the methods used to measure thrust. If you are only concerned about what sensor to use, you have to use S-type load sensor or LVDTs or baffle plates but they all generate only voltage signal which is meaningless, so you would need someway to calibrate that voltage into thrust with some known masses. Go through the paper once and if you have questions, I will be around. | |
| Feb 7, 2019 at 15:33 | comment | added | Vegeta sama | Thank you very much for your suggestion but I have one other question about the experiment with other gases. Other than obtaining the gases I don't know which measuring tool can be used to measure the thrust in the vacuum tank. | |
| Feb 7, 2019 at 15:29 | vote | accept | Vegeta sama | ||
| Feb 6, 2019 at 14:02 | history | answered | MyTwoCents | CC BY-SA 4.0 |