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.
WaveRunner: I should thank you for all the work you put into your code! Are you still working on it? There are two limitations that I would put at the top of my list:
1) Ability to have a coil longer than the projectile, and 2) Ability to simulate pulsing the coil when the projectile has already entered it.
I wrote some code to display a 2D map of delay times vs. pulse times which uses colors to show hotspots where the maximum velocity, energy, or whatever parameter you choose lies. It is interesting to look at, and I will release it soon.
TheMerovingian: I currently have the projectile material fixed at mild steel, so it is ok for reluctance gun only. The next release will allow you to pick projectile material and starting position, I think the same functions will simulate an inductance gun too.
Registered Member #29
Joined: Fri Feb 03 2006, 09:00AM
Location: Hasselt, Belgium
Posts: 500
Hi William, I occasionally play with my coilgun codes. However, I have not had a lot of time in the lasr few months.
I do have a code that simulates projectiles of any length (even any shape, if you want). It is based on a finite element method, so the geometry input is more complicated than the simple code.
I can make the FEM code available to you, if you like. Alternatively, I can change the simplified model code to fit your requirements. Let me know what oter specfic changes you want (other then the projectile length constraint)...
Registered Member #4259
Joined: Mon Dec 12 2011, 06:48PM
Location:
Posts: 10
that link is not working. I remember a coilgun simulator ages ago that was just a load of text boxes where you tweak the values in them in order to match coil size to voltage to capacitance, etc, but I cannot find it anywhere now. does anyone have a link, please?
Registered Member #2099
Joined: Wed Apr 29 2009, 12:22AM
Location: Los Altos, California
Posts: 1716
You might be thinking of "Barry's" coilgun site. Could start at
The javascript simulator seems to be in disrepair, or my Java installation is broken. Would anyone be interested in getting similar charts from a spreadsheet (Excel or open source), in which you type in values for R, L, and C? The inductance calculator was similar in style. Sliders & stuff for data entry. Handy calculation of turns per layer, number of turns, etc. Then trival application of Wheeler's formula.
Registered Member #90
Joined: Thu Feb 09 2006, 02:44PM
Location: Seattle, Washington
Posts: 301
The java simulators at Barry's coilgun site are sadly all broken. Sorry about that. The whole browser-side java platform suffered self-immolation by security issues and really can't/shouldn't be used at all. I need to rewrite them all in modern technology (html5?) to make them work again, but it's not a priority and it's a lot of work and I have no plans to do so. Bummer, I know. Barry
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.
Coil Gun Simulator
