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 #608
Joined: Wed Mar 28 2007, 12:01AM
Location: Canada
Posts: 17
Would it be a good idea to connect the caps in series to increase the voltage, which would lower the amound of energy loss and then use a step-down transformer to lower the voltage and increase the current going through the rails?
Registered Member #608
Joined: Wed Mar 28 2007, 12:01AM
Location: Canada
Posts: 17
I have very limited resources, and can only get capacitance around 300v at 2400uf, is it still possible to fire a small projectile off, 10in Aluminum rails with a good connections to the rails?
Registered Member #191
Joined: Fri Feb 17 2006, 02:01AM
Location: Esbjerg Denmark
Posts: 720
2400uF at 300V is a hundred J, I hope you know what you are doing. expect long charge time if you are planning on using camera flash circuits.
as i said, Alu is bad as it has very high friction, especially Alu on Alu. Low melting point is also a problem, welds easily. Copper is ideal, brass works too. if you have a lot of time and are good with tools, you should be able to get two strips of brass out of a standard brass door hinge. grind it true and you will have a set of rails.
rails don't need to be long. unless, you want to cheat a bit and make a ETC gun that runs on alu foil.
just like ... said, make sure your barrel is air tight, and sealed at one end. then its just pressure and F = ma.
Registered Member #608
Joined: Wed Mar 28 2007, 12:01AM
Location: Canada
Posts: 17
So far, i have only been able to find flash circuits in a camera to charge up my capacitance but, thanks for info about using brass as rails, if i can't make it work than i will seal one end and use a plasma armature.
Registered Member #95
Joined: Thu Feb 09 2006, 04:57PM
Location: Norway
Posts: 1308
I recommend that you start with a coil gun, as this is obviously your first project. You can use all the materials you already have + some wire for the coil. Have you seen those photo-flash coil guns, there are hundreds of them on google and you are almost guaranteed a result. Use the various calculators at the magnetic gun club and you should be able to make a coil gun which can shoot at least 10 feet. Once you get that down, then work on a rail gun.
Registered Member #608
Joined: Wed Mar 28 2007, 12:01AM
Location: Canada
Posts: 17
I can't build a coilgun for this project but, can anyone give me an idea of an easy to build electromagnetic projectile accelerator so i can research it, and try to build it before attempting the railgun.
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.
railgun
