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 #179
Joined: Thu Feb 16 2006, 02:08AM
Location: Hagerstown, Maryland - Close to Prime Outlets
Posts: 287
That will happen out in a field somewhere....'cause when a sheet of metal goes up.....yeah......I'm already getting 1/4" thick 1footx1foot plates of aluminum across the garage on less than 500j.
I want to calculate the efficiencies when I send one up, and create charts and graphs like I did with my 3.5kj launchers last year, where I repeatedly reached 10%.
Registered Member #1550
Joined: Tue Jun 17 2008, 04:46PM
Location:
Posts: 8
Well, its awsome, I'm just wondering where he got those...and if he ordered them or got them for free. Yep, and all you gotta do is be careful, and hope that a blast won't happen.
Registered Member #1389
Joined: Thu Mar 13 2008, 12:50AM
Location: Pittsburgh, PA
Posts: 346
Doh. Sheesh, just because people can't see it, it seems a good deal of people can't understand Electromagnetism. Apparently Tesla's inventions are magical as well.
In any case, looking great. I can't wait to see a 6" diameter rocket being booted skyward by a 24kJ electromagnetic pulse. It looks like it might be a great way to launch larger rockets without a LEUP!
I've been toying with the idea of building some Alpha sized induction rocket launchers to toy around with in the back yard. I might try some air-started motors as well, for some extra fun, thanks for inspiration, FastMHz.
Registered Member #179
Joined: Thu Feb 16 2006, 02:08AM
Location: Hagerstown, Maryland - Close to Prime Outlets
Posts: 287
HI EVERYONE!! I'm still alive, and better than ever. Now that the weather has warmed up, I'm beginning to bring out the big launchers again.
As it stands, I have my large pancake coil (~ 11" diameter) ready to go. My "rockets" of the moment are 5gal buckets with a 1/4" thick slab of aluminum mounted to the bottom. A 12kj pulse the other day sent this >2kg projectile skyward, and it went so high it appeared about the size of the moon. After a few launches, the bucket was destroyed.
I now have a new one, with a better mounted plate, and somewhat of a cone shaped top. I will be launching this soon, and taking video of the action. I hope to get some rough calculations of efficiency going onward.
Registered Member #1497
Joined: Thu May 22 2008, 05:24AM
Location: Toronto, Ontario, Canada
Posts: 801
Damn, we haven't heard from you in so long didn't know if you were still alive...
Out of curiosity, have you ever tried launching stuff horizontally mounted on a rail or otherwise? Imagine a magnetically launched cart or something...
Registered Member #1497
Joined: Thu May 22 2008, 05:24AM
Location: Toronto, Ontario, Canada
Posts: 801
Thats why I meant more a reinforced metal plate mounted against a cart on wheels, with the coil solidly in place so all the energy goes into acceleration... would be an interesting thing to see something go from 0 to reallyreallyfast instantly....
Or it could be a bust and cause little momentum change, being anticlimactic.
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.
[moved] 24,000j Capacitor Bank (Now Complete)
Sheesh, just because people can't see it, it seems a good deal of people can't understand Electromagnetism. Apparently Tesla's inventions are magical as well.