Welcome
Username or Email:

Password:


Missing Code




[ ]
[ ]
Online
  • Guests: 116
  • 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 »   

first coilgun

Move Thread LAN_403
phinsil6
Tue Jan 13 2009, 09:11PM Print
phinsil6 Registered Member #1914 Joined: Wed Jan 07 2009, 06:50PM
Location:
Posts: 17
i am attempting to make my first coilgun. i have made successful low power solenoids in the past but never a coil gun. Here's the plan. I am going to make this boost converter
Link2
to get 24DVDC to 450VDC to charge up a bank of 500V 1500uF capacitors. I plan on using 14awg square magnet wire on a 4" pvc pipe. does all this sound right? please advise on any problems. also, some help on how this schematic works would be great as well. i have the general idea down, and all the parts on their way, but i have to admit, the actual schematic is quite daunting. thanks for all comments and advice
Back to top
rp181
Tue Jan 13 2009, 09:38PM
rp181 Registered Member #1062 Joined: Tue Oct 16 2007, 02:01AM
Location:
Posts: 1529
Every thing will for fine, excepts the 4" pipe. 4" pipe is way to big, use 1/2" or smaller.
Back to top
phinsil6
Tue Jan 13 2009, 09:45PM
phinsil6 Registered Member #1914 Joined: Wed Jan 07 2009, 06:50PM
Location:
Posts: 17
how many layers should i put on this 1/2" pipe, because that's not very long at all. in fact that seems really short, all of the other powerful guns i've seen have been longer coils than that
Back to top
rp181
Tue Jan 13 2009, 10:58PM
rp181 Registered Member #1062 Joined: Tue Oct 16 2007, 02:01AM
Location:
Posts: 1529
Oh sorry, i thought you meant 4" PVC, as in diameter. For length 4 inches is fine. What bore size are you doing? How long is your projectile?
Back to top
KLH
Wed Jan 14 2009, 06:15PM
KLH Registered Member #1819 Joined: Thu Nov 20 2008, 04:05PM
Location:
Posts: 137
What is your total energy storage? (Energy = 1/2 * Cap Voltage * Capacitance in Farads) In addition, how many urns / layers are you going to use for your coil? The reason why I ask is that 14AWG just may be too small, depending on its inductance and how much energy you dump into it. My 96-turn 10AWG (!!!) currently dissipates over 50% of the input energy, with a peak current of 6150A and an input energy of 1903.5J.
Back to top
Barry
Thu Jan 15 2009, 06:33PM
Barry Registered Member #90 Joined: Thu Feb 09 2006, 02:44PM
Location: Seattle, Washington
Posts: 301
Correction, use the voltage squared, as in:

Potential energy PE = 1/2 C V^2

where C is capacitance in Farads, V is voltage, and energy is Joules
Back to top

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.