I'm also planning to use a cartridge-based system so I can quickly and easily reload the system.

You think like me. http://www.spudfiles.com/forums/4mm-etg ... rt,15.html

245Tommy, "In my gun, the arc would extinguish even if there was a little water in the capillary tube at 660 and 1000v." What was the length of the arc material? Was the water in contact with the arc material before discharge? The strips of aluminum foil were 4x20-25mm and yeah sometimes the water ...

In my gun, the arc would extinguish even if there was a little water in the capillary tube at 660 and 1000v.

Has anyone tried to build a gun that safely harnesses the power of DDT? I've seen some research papers on PDE's that claim achieving DDT in 11 inches or less with a 1x mix of propane/oxygen. They use a schelkin spiral to increase turbulence for such a short distance. Any thoughts on whether this is...

Why did you make the capillary tube and insulator flush? Thats never a good idea. Extend the capillary tube to overlap the chamber some. You can poke a hole in the capillary tube to get the fuse wire out. It will also help with high voltage safety. You mean in the side of the tube? That would proba...

Silent is hardly the term for these.. LOL.. Think speaker coil and a massive shotgun shell going off next to it. The discharge time and thus the time things get moving is well into the audiable range. There is no exploding gunpowder, but with a blindfold, it will be hard to tell the difference. Did...

I'd at least double the amount of camera caps, even if it's efficient it probably wouldn't even go through a soda can on five caps. You can design the coil with this simulator. http://cool-science.tk/ For the projectile, just use a mild steel rod as close to the inside dia of coil as possible and ab...

The aim with this project is to generate a coilgun that can give an air rifle reasonable competition. I'm hoping for 30 Joules kinetic, 120 m/s, 10 shots a minute, 5 MOA grouping and perhaps 20% efficiency. I might better those goals, but those alone would be more than enough - if I met them, I'd h...

@245Tommy: I recently developed and tested a prototype design which should be very effective on the "holding together" front. I'll try to get around to posting it this week. Far simpler than my old design, and seemingly sturdier. At any significant energy, plasma will be very effective at leaking o...

Is anyone working on an ETG? They're probably the easiest high velocity gun for an amateur, here's the latest updates on mine. http://4hv.org/e107_plugins/forum/forum ... .php?87092 The barriers I found are having a fast enough discharge time and getting the chamber to stay together.

Translators are failing for me, but from looking at the pictures, it seems they used a high voltage pulse around the main work coil, to induce a a low rise time pulse in the main coil, for faster current ramp. That was something Ragnarok was talking about in reluctance based designs. Google "rapp i...

This is the only amateur tubular induction gun I've seen, is shoots just under supersonic, 1kj stored energy. http://www.rapp-instruments.de/index6.htm

Sam thinks his railgun is shooting at 1000 - 2000m/s.

Well, here is mine. Made by Ontario Kinetics, mostly brass and polycarbonate (also some aluminum, steel and SS where necessary). Shoots ~4200 fps with a .12 (with a little bit more recoil) and has no hop-up yet (nor will it ever, as it's entirely immobile when connected to the capacitor and takes a...

I made one out mild steel, the chamber started collapsing but it still works. I measured 3lbs of thrust.