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Natural Science Forum / Physics / General Physics / July 2005Help building rail gun
Hi! I am a high school student trying to assemble parts for a physics project. I am posting for help in two areas. First, if anyone can augment my research by posting a link, I'd love it even if I've already read it. Second, I'm trying to assemble a power supply, so if anyone has any large capacitors that they would like to part with, I'd love to try to make a deal with you. If you've built a compulsator, I'd love to hear from you too as I know that although hard to build, you can build them. I live in the San Francisco Bay Area in California, so if you know of any places around here to find this sort of stuff that would be great. I was wondering if anyone had ever experimented with a liquid nitrogen cooled rail gun. It might not only reduce rail errosion by cooling down the rails, but would turn them into superconductors and more effeciently conduct electricity. Would the heat generated just cause the gas to expand and blow the whole thing up? Any thoughts? > Hi! I am a high school student trying to assemble parts for a physics > project. I am posting for help in two areas. First, if anyone can > augment my research by posting a link, I'd love it even if I've already > read it. Second, I'm trying to assemble a power supply, so if anyone > has any large capacitors that they would like to part with, I'd love to > try to make a deal with you. You could try ebay. Lots of capacitors on there.. http://search.ebay.com/troll_W0QQfkrZ1QQfromZR8 > > Hi! I am a high school student trying to assemble parts for a physics > > project. I am posting for help in two areas. First, if anyone can [quoted text clipped - 5 lines] > You could try ebay. Lots of capacitors on there.. > http://search.ebay.com/troll_W0QQfkrZ1QQfromZR8 Snapping together a whole bunch of 9V transistor batteries in series has its merits.  SignatureUncle Al http://www.mazepath.com/uncleal/ (Toxic URL! Unsafe for children and most mammals) http://www.mazepath.com/uncleal/qz.pdf A rail gun is no big deal. bee bee gun speeds should be easy . The bullet is the armeture and its coil is wound so as it makes contact between 2 barrel coils at a time as it slides down the barrel. The insulation around the coil wire in the bullet can help non SC coils work in slow bullets. President ragun 1000 points of light ... a 850 tesla superconducting bullet that will be fryied befor it gets out the gun but will be going 25000 mps. miles per second. And fire 2000 evry 60 seconds. > Snapping together a whole bunch of 9V transistor batteries in series > has its merits. Car batteries work better. >> Snapping together a whole bunch of 9V transistor batteries in series >> has its merits. > >Car batteries work better. Use lightning rod and wait.... >>> Snapping together a whole bunch of 9V transistor batteries in series >>> has its merits. >> >>Car batteries work better. > Use lightning rod and wait.... Then he'd need a castle with a tall tower and a hand cranked winch to lift the "subject" to the top of the tower in the throes of a raging electrical storm. "IT'S ALIVE!!! IT'S ALIVE!!!! AH HA HA HA HAHAHAHAHAHA!!!!" Liquid nitrogen is not cold enough to make most viable rail materials superconducting. PD > Hi! I am a high school student trying to assemble parts for a physics > project. I am posting for help in two areas. First, if anyone can [quoted text clipped - 11 lines] > effeciently conduct electricity. Would the heat generated just cause > the gas to expand and blow the whole thing up? Any thoughts? > Liquid nitrogen is not cold enough to make most viable rail materials > superconducting. > > PD yeah, but after playing C&C all day I kinda thought "WOW, what an experiment...<thoughts>..." let's not knock the lad down and help him maybe :) Does it need to be superconducting to make a good rail gun? I'd sacrifice a good bit of heat between shots to get a decent acceleration. The heat calculations are easy, how to dump that heat in the current flow are the object of the exercise I think :) As an undergrad it's a good experiment to conduct......over to the peanut galleries you nead no SC to make a slow rail gun. the coil in the bullet wount take much . > Hi! I am a high school student trying to assemble parts for a physics > project. I am posting for help in two areas. First, if anyone can [quoted text clipped - 9 lines] > cooled rail gun. It might not only reduce rail errosion by cooling > down the rails, http://www.fuckinggoogleit.com/ "rail gun" "liquid nitrogen" 270 hits "rail gun" "power supply" 758 hits > but would turn them into superconductors and more > effeciently conduct electricity. Would the heat generated just cause > the gas to expand and blow the whole thing up? Any thoughts? Hey chump, the big problem is inductance loading. Major pulsed power through a supercon - very droll. 77 K supercon rails - very droll. Mabye you should use a really big pulsed laser and a solar cell. SignatureUncle Al http://www.mazepath.com/uncleal/ (Toxic URL! Unsafe for children and most mammals) http://www.mazepath.com/uncleal/qz.pdf > Hi! I am a high school student trying to assemble parts for a physics > project. I am posting for help in two areas. First, > if anyone can augment my research by posting a link, > I'd love it even if I've already read it. http://www.powerlabs.org/railgun.htm Signaturepete I thought I had replyed to this earlier, but it looks like my reply didn't get through, so here it goes again. I did search on google for that stuff, but those results don't actually give you any meaningful results. They mostly are just coincidences as people like all that sort scientific stuff. There is only one mention of any merit that I read, and I think that was as a cooling system and it didn't saying anything more than that. I might have assembled a couple of kJ of power now, but the more the better so I am going to keep looking. Now I just need the IGBTs and the diodes. replied |
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