Welcome
Username or Email:

Password:


Missing Code




[ ]
[ ]
Online
  • Guests: 100
  • Members: 0
  • Newest Member: omjtest
  • Most ever online: 396
    Guests: 396, Members: 0 on 12 Jan : 12:51
Members Birthdays:
No birthdays today

Next birthdays
09/29 Ultra7 (54)
09/29 uitvinderalex (36)
09/30 Terrorhertz (15)
Contact
If you need assistance, please send an email to forum at 4hv dot org. To ensure your email is not marked as spam, please include the phrase "4hv help" in the subject line. You can also find assistance via IRC, at irc.shadowworld.net, room #hvcomm.
Support 4hv.org!
Donate:
4hv.org is hosted on a dedicated server. Unfortunately, this server costs and we rely on the help of site members to keep 4hv.org running. Please consider donating. We will place your name on the thanks list and you'll be helping to keep 4hv.org alive and free for everyone. Members whose names appear in red bold have donated recently. Green bold denotes those who have recently donated to keep the server carbon neutral.


Special Thanks To:
  • Aaron Holmes
  • Aaron Wheeler
  • Adam Horden
  • Alan Scrimgeour
  • Andre
  • Andrew Haynes
  • Anonymous000
  • asabase
  • Austin Weil
  • barney
  • Barry
  • Bert Hickman
  • Bill Kukowski
  • Blitzorn
  • Brandon Paradelas
  • Bruce Bowling
  • BubeeMike
  • Byong Park
  • Cesiumsponge
  • Chris F.
  • Chris Hooper
  • Corey Worthington
  • Derek Woodroffe
  • Dalus
  • Dan Strother
  • Daniel Davis
  • Daniel Uhrenholt
  • datasheetarchive
  • Dave Billington
  • Dave Marshall
  • David F.
  • Dennis Rogers
  • drelectrix
  • Dr. John Gudenas
  • Dr. Spark
  • E.TexasTesla
  • eastvoltresearch
  • Eirik Taylor
  • Erik Dyakov
  • Erlend^SE
  • Finn Hammer
  • Firebug24k
  • GalliumMan
  • Gary Peterson
  • George Slade
  • GhostNull
  • Gordon Mcknight
  • Graham Armitage
  • Grant
  • GreySoul
  • Henry H
  • IamSmooth
  • In memory of Leo Powning
  • Jacob Cash
  • James Howells
  • James Pawson
  • Jeff Greenfield
  • Jeff Thomas
  • Jesse Frost
  • Jim Mitchell
  • jlr134
  • Joe Mastroianni
  • John Forcina
  • John Oberg
  • John Willcutt
  • Jon Newcomb
  • klugesmith
  • Leslie Wright
  • Lutz Hoffman
  • Mads Barnkob
  • Martin King
  • Mats Karlsson
  • Matt Gibson
  • Matthew Guidry
  • mbd
  • Michael D'Angelo
  • Mikkel
  • mileswaldron
  • mister_rf
  • Neil Foster
  • Nick de Smith
  • Nick Soroka
  • nicklenorp
  • Nik
  • Norman Stanley
  • Patrick Coleman
  • Paul Brodie
  • Paul Jordan
  • Paul Montgomery
  • Ped
  • Peter Krogen
  • Peter Terren
  • PhilGood
  • Richard Feldman
  • Robert Bush
  • Royce Bailey
  • Scott Fusare
  • Scott Newman
  • smiffy
  • Stella
  • Steven Busic
  • Steve Conner
  • Steve Jones
  • Steve Ward
  • Sulaiman
  • Thomas Coyle
  • Thomas A. Wallace
  • Thomas W
  • Timo
  • Torch
  • Ulf Jonsson
  • vasil
  • Vaxian
  • vladi mazzilli
  • wastehl
  • Weston
  • William Kim
  • William N.
  • William Stehl
  • Wesley Venis
The aforementioned have contributed financially to the continuing triumph of 4hv.org. They are deserving of my most heartfelt thanks.
Forums
4hv.org :: Forums :: Electromagnetic Projectile Accelerators
« Previous topic | Next topic »   

Some questions about plasma

1 2 
Move Thread LAN_403
ebp
Sat Jan 24 2009, 11:03PM Print
ebp Registered Member #1933 Joined: Sat Jan 24 2009, 10:53PM
Location:
Posts: 6
Hi i'm making a mini railgun for school project, something similar to this: http://64.233.187.104/search?q=cache:t7YO350tj_4J:www.geocities.com/physicsthings/microrailgu.htm+&hl=en&client=firefox-a. But there is something that got me wondering. Why is aluminum being used? What is the advantages to using aluminum that turns into plasma instead of some conducting material that stays solid? I hope that you can help me understand cheesey
Back to top
rp181
Sat Jan 24 2009, 11:16PM
rp181 Registered Member #1062 Joined: Tue Oct 16 2007, 02:01AM
Location:
Posts: 1529
your link is not working, seems you linked to a cached version on your computer. I think i know what your talking about though.
You want to keep the projectile intact. This one is so low power its not practical to use a actual projectile. Some railgun's use plasma armeture's. That means the material (usually foil) is vaporized, and the plasma provides the conduction path, which pushes the projectile. If you are going to do that small of a one stick with foil. You will get a ball of sparks going one direction. It's much more impressive looking though =p
Back to top
ebp
Sun Jan 25 2009, 12:07AM
ebp Registered Member #1933 Joined: Sat Jan 24 2009, 10:53PM
Location:
Posts: 6
If you copy this link to your it should work: Link2 it's from google cache. I still don't understand why it has to be vaporized instead of just using a conductive projectile. Is the plasma just for show? :)
Back to top
Camel
Sun Jan 25 2009, 01:33AM
Camel Registered Member #1694 Joined: Sat Sept 13 2008, 09:13AM
Location: Australia
Posts: 108
It doesn't have to be vaporised, anything conductive would work. I guess since he was firing a slither of al foil, the plasma was unavoidable.
I've never built or done much research on rail guns, but I think most rail gunners try to avoid the arcing and plasma because its corrodes the rails.
Back to top
ebp
Sun Jan 25 2009, 06:52PM
ebp Registered Member #1933 Joined: Sat Jan 24 2009, 10:53PM
Location:
Posts: 6
Camel wrote ...

It doesn't have to be vaporised, anything conductive would work. I guess since he was firing a slither of al foil, the plasma was unavoidable.
I've never built or done much research on rail guns, but I think most rail gunners try to avoid the arcing and plasma because its corrodes the rails.

Ok thanks :) I think i will avoid plasma then and just use a conductive projectile, since i'm going to do some experiments. Is there a specific material that would be suited for this?
Back to top
rp181
Sun Jan 25 2009, 07:22PM
rp181 Registered Member #1062 Joined: Tue Oct 16 2007, 02:01AM
Location:
Posts: 1529
any conductive non magnetic projectile. (copper and alu are the easiest)
Back to top
ebp
Sun Jan 25 2009, 07:50PM
ebp Registered Member #1933 Joined: Sat Jan 24 2009, 10:53PM
Location:
Posts: 6
rp181 wrote ...

any conductive non magnetic projectile. (copper and alu are the easiest)

Thanks, by using material that doesn't turn in to plasma, shouldn't it be easier go get consistent firing?
Back to top
big5824
Sun Jan 25 2009, 10:29PM
big5824 Registered Member #1687 Joined: Tue Sept 09 2008, 08:47PM
Location: UK, Darlington
Posts: 240
people have used hard plastics before i think

/edit yes with aluminium as the propelent, forgot to mention that
Back to top
Electroholic
Mon Jan 26 2009, 03:16AM
Electroholic Registered Member #191 Joined: Fri Feb 17 2006, 02:01AM
Location: Esbjerg Denmark
Posts: 720
big5824 wrote ...

people have used hard plastics before i think
with alu tape for plasma generation.
Back to top
ebp
Tue Jan 27 2009, 08:21PM
ebp Registered Member #1933 Joined: Sat Jan 24 2009, 10:53PM
Location:
Posts: 6
I think i'm try out some different thinks, but thanks for the replies :)
Back to top
1 2 

Moderator(s): Chris Russell, Noelle, Alex, Tesladownunder, Dave Marshall, Dave Billington, Bjørn, Steve Conner, Wolfram, Kizmo, Mads Barnkob

Go to:

Powered by e107 Forum System
 
Legal Information
This site is powered by e107, which is released under the GNU GPL License. All work on this site, except where otherwise noted, is licensed under a Creative Commons Attribution-ShareAlike 2.5 License. By submitting any information to this site, you agree that anything submitted will be so licensed. Please read our Disclaimer and Policies page for information on your rights and responsibilities regarding this site.