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.
Registered Member #679
Joined: Thu May 03 2007, 02:59PM
Location:
Posts: 3
Hi
I was wondering if anyone hs thought about using a magnetic bullet in a coil gun? I was thinking about it the other day and wondered if you could pulse the coils twice, the first pulse is the same as a normal non magnetic bullet coil gun pulse, cutting off before the fied reverses and you get suck back. The second would be when half of the bullet is out of the other end of the coil to give it another push?
Registered Member #179
Joined: Thu Feb 16 2006, 02:08AM
Location: Hagerstown, Maryland - Close to Prime Outlets
Posts: 287
I've never attempted to launch a magnetic projectile....if I can somehow shape one of my magnets into a round slug that'll fit my CG I'll give it a go.
Registered Member #679
Joined: Thu May 03 2007, 02:59PM
Location:
Posts: 3
i was thinking of more along the line of a slug shaped projectile. It would be relatively easy to turn one into a magnet by just stoking the slug with a hard magnet in on direction lots of times.
Registered Member #27
Joined: Fri Feb 03 2006, 02:20AM
Location: Hyperborea
Posts: 2058
If your projectile can be magnetized that easy, what do you think will happen when it is placed in a magnetic field that is 1000 times stronger in the coil gun?
Registered Member #191
Joined: Fri Feb 17 2006, 02:01AM
Location: Esbjerg Denmark
Posts: 720
if you can magnitize your projectile with a strong magnet, what makes you think that your coil won't demagnetize or magnetize it the other way when you fire the coil gun.
These would seem to be your best bet Ebay # 160109966236 Large but powerfull 160110001500 small but cheap 250109710446 still a little large 110120399493 this seems to be a good size
Neodymium resists demagnetization but its brittle and light compare to other balistic materials. Keep in mind if you want to try somthing like how many of the magnets will be available for sale. It would be very regretable if you were to break your last magnet and find that you can't find more the same size.
Registered Member #886
Joined: Sun Jul 08 2007, 06:10PM
Location:
Posts: 1
hi iam new..... any way ive been doing tests with some thing simlar but instead of a magnetic bullet ive been useing a steel bb and crushed ceramic magnets pack down in the base of the barral, the disanct the bb tavals has gone from (my frist coil gun) about a foot to about 10 - 15 feet with no other ajustments to the gun but not evry shot is relable some times it take a few pules for it to fire
Registered Member #639
Joined: Wed Apr 11 2007, 09:09PM
Location: The Netherlands, Herkenbosch
Posts: 512
plur wrote ...
hi iam new..... any way ive been doing tests with some thing simlar but instead of a magnetic bullet ive been useing a steel bb and crushed ceramic magnets pack down in the base of the barral, the disanct the bb tavals has gone from (my frist coil gun) about a foot to about 10 - 15 feet with no other ajustments to the gun but not evry shot is relable some times it take a few pules for it to fire
I used magnets from a old scsi hard drive on both sides of the coil and found that the efficiency increases. One explanation is that the field from the coil gets confined in the center of the coil by the external magnets.
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.