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hi, i would like to know what is beter a coil gun or a rail gun (or if one is beter at low voltage and the other at hi voltage) also how do you make a multi coiled coil gun (and get it timed right) im new to this so plz explane it like in an idiot.
Registered Member #95
Joined: Thu Feb 09 2006, 04:57PM
Location: Norway
Posts: 1308
Better depends on what you want to achieve. A railgun will give a big noisy muzzle flash and send the projectile out with low efficiency, while a coil gun will shoot quietly and with somewhat higher efficiency. Voltage depends on component constraints, but given the nature of railguns I think high voltage would be preferable there. I've never built one though so it might not be necessary. For both coilguns and railguns voltages from 100 - 1000V are typically used. Successive coils in a multi-stage coilgun are trigger by sensing the projectile position or precise timing. An inductive sensor or photo-gate can be used for sensing.
Registered Member #90
Joined: Thu Feb 09 2006, 02:44PM
Location: Seattle, Washington
Posts: 301
Here's one factor in your choice between railgun and coilgun...
Railgun construction requires some good fabrication skills and equipment, since you'll be striving for a very low ohmic resistance connection AND low friction through a sliding armature. It seems to me that railguns are more of a mechanical engineering feat than electrical engineering.
Coilguns are mechanically as simple as you can get. Everything in a coilgun is low-tolerance construction. A piece of iron of any shape will slide down a barrel of almost any size, inside a coil that can be randomly wound. Of course some sizes and shapes will work better than others but its construction is simple.
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questions regarding coilguns and railguns
