Main Menu
bullet Home
bullet Forum
bullet Members
bullet Member Map
bullet HvWiki
bullet Chat Room
bullet Submit News
bullet Site Rules
bullet Archives
bullet Visits
bullet Forum
Welcome
Username or Email:

Password:


Missing Code




[ ]
[ ]
Online
  • Guests: 27
  • Members: 0
  • Newest Member: omjtest
  • Most ever online: 396
    Guests: 396, Members: 0 on 12 Jan : 12:51
Members Birthdays:
All today's birthdays', congrats!
Desmogod (48)
Alex Smith (31)


Next birthdays
04/26 Bead (41)
04/26 Fumeaux (25)
04/28 Steve Conner (46)
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 »   

A Little Help in an Ejecter Seat Project

1 2 
Move Thread LAN_403
The Electricuted
Sat Mar 25 2006, 09:46PM Print
The Electricuted Registered Member #309 Joined: Sun Mar 12 2006, 05:37PM
Location:
Posts: 3
 		Hey ,

I want 2 make an ejecter seat project using the coil gun

W6w 20060326120154dda33670

the SCR parts in this circuit werent found at all

could u recommend any spare parts that could do the job well ?

Further more , could a simpler circuit do the job as well with a toy car and a toy seat ?

Any suggestions and help would be appriciated

[Edit: Fixed oversize picture]
Back to top
...
Sat Mar 25 2006, 11:56PM
... Registered Member #56 Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
 		Do you need 3 stages?

You can eliminate almost all of the circuitry if you only need one...

For the scr, just about any mid sized one will work :)

btw, you might want to show your source before a mod deletes the post.
Back to top
Maz
Sun Mar 26 2006, 12:25AM
Maz Registered Member #111 Joined: Fri Feb 10 2006, 01:04AM
Location: Menasha,Wisconsin
Posts: 65
 		i say go with an induction design, then you dont hae to fillle around with all the mechanical stuff pluss it would be shorter to make.
just get a photoflash charging circuit, make it smaller if you want. then use it to charge caps(that you took off the board) and use those to propel your seat. no real circuit needed, and only one stage. cheesey
Back to top
Steve Conner
Sun Mar 26 2006, 12:45AM
Steve Conner Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
 		I think Maz is sort of right. Reluctance coilguns (the ordinary kind) fire the projectile by sucking it into the coil and then quickly turning the magnetic field off, so letting it shoot out the other side. It might be tricky to mate that to an ejector seat. An induction gun always repels the projectile.

By the way, you posted an oversized image sponged from someone else's site without crediting it. And spelt "electrocuted" wrong. Beware the clue stick!
Back to top
The Electricuted
Sun Mar 26 2006, 10:04AM
The Electricuted Registered Member #309 Joined: Sun Mar 12 2006, 05:37PM
Location:
Posts: 3
 		hey , if i didnt have a charging circuit , how can i design one and how would i connect it to the capacitors and the coil ?
Back to top
ragnar
Sun Mar 26 2006, 07:40PM
ragnar Registered Member #63 Joined: Thu Feb 09 2006, 06:18AM
Location:
Posts: 1425
 		Bzzzt! Cluesticked again, buddy. =P

Have you thought about a small boost converter with a 555/TL494 and an SCR?
Back to top
Madgyver
Sun Mar 26 2006, 08:43PM
Madgyver Registered Member #177 Joined: Wed Feb 15 2006, 02:16PM
Location: Munich, Germany
Posts: 214
 		Wait a second. You want to build an ejector seat? amazed

Sounds neat. Though I think a radio controlled relay, releasing a spring could do the job better.
Back to top
The Electricuted
Sun Mar 26 2006, 08:58PM
The Electricuted Registered Member #309 Joined: Sun Mar 12 2006, 05:37PM
Location:
Posts: 3
 		for an air craft , the spring wont be a good idea
Back to top
Madgyver
Sun Mar 26 2006, 09:03PM
Madgyver Registered Member #177 Joined: Wed Feb 15 2006, 02:16PM
Location: Munich, Germany
Posts: 214
 		Well what kind of aircraft? How strong do you guess should it be? Cause I doubt, that you could build a small lightweight coilgun which can deliver a greater punch then a spring of same wheight and size.
Back to top
Coyote Wilde
Sun Mar 26 2006, 09:41PM
Coyote Wilde Registered Member #175 Joined: Tue Feb 14 2006, 09:32PM
Location: Sudbury, ON
Posts: 111
 		Wait... do you mean an actual ejector seat?
As in, for use with a human being or yourself?
Any kind of electromagnetic launcher isn't going to work... spring loading neither. They use rockets on military seats for a reason... but this avenue of research is only going to get yourself killed.

If you mean for a model aircraft... then I agree with Madgyver, a spring is probably going to work out better for you., if only by the KISS principle.
Back to top
1 2 

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.