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 #1062
Joined: Tue Oct 16 2007, 02:01AM
Location:
Posts: 1529
First off, this is not in m project thread because i did not want to quadruple post.... Second, I accidentally did it without running the program for the rogowski coil !!grr
Now the info:
The railgun was fired today, with one digital camera and a digital camcorder (unable to connect to computer ATM). The injection pressure was probably around 50 PSI.
As most of you know, the enclosure is a 2 piece set, with a half inch bore. The projectile was a aluminum block with a V tail, 1.25" long. The target was a cardboard box packed with paper (for reference, the injection alone barely broke the first layer of cardboard) with a metal plate on the back. The projectile went through all the way, and put a .5" dent in the metal plate.
Here is the interesting bit: I put a layer of kopr-shield corrosion inhibitor on the rails. When i opened it up, there was almost NO rail erosion. The only damage was a pit with aluminum in it at the very beginning, and a small deposit in the middle. Before i i washed it, there was still a film of the material left. Projectile corrosion was significant, so that will be main point of research from now on.
Im not very good at explanation's, so here are some picture's/video. If you have any questions, ask.
Video:
Notice two things: 1) the slow falling things. I think that is the plastic insulation on the rails. 2) The cable's. Those where zip-tied with 3 ties, and they still broke!
Pictures:
I have tons of pics, so if you want something in particular, ask.
Registered Member #1062
Joined: Tue Oct 16 2007, 02:01AM
Location:
Posts: 1529
Two pics I found. They where just put in a clamp, and pushed. I used a soft target because I had no thicker plate, and I wanted to recover the projectile.
Registered Member #1062
Joined: Tue Oct 16 2007, 02:01AM
Location:
Posts: 1529
Whats with the MEOW?
I will fire it again, but the copper rail broke, so i have to remachine it. Rail has to be shortened by 3" too. The copper rail that broke is stuck in the G-11, I have to figure out how to get it out.
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 fired!
