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28,8Kj ElectroThermal Gun! (Soon handheld)

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Unread postAuthor: jon_89 » Sat Mar 15, 2008 12:17 am

What size capacitor bank did you use on the smaller size one?
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Unread postAuthor: Gunner » Sat Mar 15, 2008 3:41 am

Larda, could you demonstrate with your bigger or smaller gun with 10kJ charge? And you could shoot to wood plank?
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Unread postAuthor: POLAND_SPUD » Sat Mar 15, 2008 4:26 am

wow..... :D amazing
I hope you are going to build your next gun with 2" barrel :shock:

when I asked how much gases are produced I basically ment that you could measure it somehow to find out whether lenghtening to barrel would increase muzzle velocity and how much longer barrel you can use
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Last edited by POLAND_SPUD on Sat Mar 22, 2008 6:25 am, edited 2 times in total.
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Unread postAuthor: jon_89 » Wed Mar 19, 2008 10:36 pm

Has anyone tried this?http://www.instructables.com/id/How-to-build-a-simple-Plasma-Rifle-aka-Electrother/. Do you think it would have ok power or horrible power. I am thinking of maybe adding an extra capacitor or two.
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Unread postAuthor: Gunner » Fri Mar 21, 2008 10:57 am

I could try that, looks very cool!
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Unread postAuthor: Gunner » Sat Mar 22, 2008 8:11 am

Could this schematic works?
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Unread postAuthor: Hotwired » Sat Mar 22, 2008 9:12 am

Yep thats the basic idea but the two terminals have to be insulated from the walls if they're made of metal.
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Unread postAuthor: Gunner » Sat Mar 22, 2008 9:24 am

But how close two terminals have to be if voltage is 800V?
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Unread postAuthor: DYI » Sat Mar 22, 2008 9:35 am

Very close, if you're jumping an air gap. This works by passing current through a conductor, so the voltage doesn't have to be absurdly high.
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Unread postAuthor: Hotwired » Sat Mar 22, 2008 9:38 am

Well 3,000,000V can jump 1m so 800V can jump 0.2666... mm
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Unread postAuthor: Gunner » Sat Mar 22, 2008 10:59 am

So is this gun based on it that the air between electrodes becomes to plasma and the so the pressure increases? And Larda uses aluminium powder that turn into plasma?Thanks!
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Unread postAuthor: Gunner » Sat Mar 22, 2008 3:39 pm

As jon_89 asked, what is your capasitor bank in smaller one? :D
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Unread postAuthor: Gunner » Sat Mar 29, 2008 10:01 am

Larda has forgot us... :oops: :lol:
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Unread postAuthor: Larda » Sun Apr 20, 2008 11:28 am

Sorry, forgot to mark "Notify me when a reply is posted" when i posted, so i missed all the new replays. :oops:
Not sure which capacitor-bank i used for the smaller one, i think bank was about 2.5-4Kj.

I have some thoughts of of building a "handheld" version of the ETG, but i am not sure if i am reckless enough to try using it . :lol:
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Push to test... Release to detonate.
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Unread postAuthor: sniper hero » Sun Apr 20, 2008 11:42 am

wow that is incredible !
the sound is so cool and the vids are awesome!
I love this gun so much :D
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coming: semi auto pellet sniper:D
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