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Registered Member #61406
Joined: Thu Jan 05 2017, 11:31PM
Location:
Posts: 268
I'm constructing a railing.
The power supply is a 15kv Nst, that goes throught a capacitive voltage divider, after the bridge rectifier it's around 9kv. The capacitor bank has 12 microwave capacitors, 4 in series, with 3 parallel.
The rails are kept short and replaced with a permanent magnetic under the plastic drum.
Registered Member #2099
Joined: Wed Apr 29 2009, 12:22AM
Location: Los Altos, California
Posts: 1714
Welcome back, Andrew. It's good to see you moving from ideas to real experiments with measured results.
Your picture shows a primitive electromagnetic motor, not a railgun (or railing, at least none obvious). That's assuming a horizontal electric current in projectile, perhaps connected to fixed electrodes by sparks.
If there's a vertical magnetic field from your permanent magnet, projectile will be forced sideways. I bet you can improve the outcome by making a better magnetic field. e.g. pole pieces, magnets on both top and bottom, permeable yoke connecting the far ends of magnets, etc.
How about the frame and ring-shaped magnets from a MWO magnetron, reassembled after you remove the electron tube and cooling fins?
Registered Member #61406
Joined: Thu Jan 05 2017, 11:31PM
Location:
Posts: 268
Thanks Kludgesmith, it made the most improvement, see another thread. I've finished the first layer, and plan to workout how to build the gun. At the moment I've got a hot ionized alkali metal to pass between the electrodes, when the bank is full charged.
Don't really have much to add, it's only being 4-5 week on this project and there's heap to go throughout.
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4059
Nice! How do you plan to avoid rail damage? Also I speak for a lot of others when I say please be VERY careful. With capacitors this big you won't survive even an indirect shock.
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Building a railgun
