Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 52 users online :: 3 registered, 0 hidden and 49 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

Registered users: Google [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Magnetic Accelerater Gun: Original?

All non-spudgun related discussion goes here such as projects, theories, serious questions, etc. All "off-topic" posts (aka useless posting, determined by moderators) will be removed.
Sponsored 

Good Idea?

Yeah, persue it
2
25%
It could work, but needs some attention
5
63%
Shank, don't even try
1
13%
 
Total votes : 8
  • Author
    Message

Magnetic Accelerater Gun: Original?

Unread postAuthor: uberlad » Sat Jul 28, 2007 11:04 pm

I have been wanting to make a mini for a while now, at least a cannon that is easy to hold in one hand, but many seem to be hindered by:
a) Being difficult to get a fuel/air ratio correct.
b) Looking very ghetto, such as being taped together, and obviously a pen in a medication container, with a lighter on the side (or something similar).
c) Being awkward in general.
(No offence intended to anyone who is protective of their mini.)

This is why I have decided to go for something a bit different. I have decided to make a mini that uses magnetic fields to propel a bb rather than combustion or pneumatic, commomly known as a Coil Gun.

I have been unable to find any topics on this subject, and since I do not have enough smartness to understand some of the explainations on other sites, I was wondering if anyone has done this before or had any experience with this and can help me out. If i have missed a thread, please just point me in the right directon.
  • 0

AY, LADS, BEVS ON ME!!!
LADSY!!!
User avatar
uberlad
Specialist
Specialist
 
Posts: 40
Joined: Sat Mar 17, 2007 12:46 am
Location: australia (the place with all the kangaroos)
Reputation: 0

Unread postAuthor: TechnoMancer » Sat Jul 28, 2007 11:17 pm

go to http://www.anothercoilgunsite.com/nf-portable-construction.htm

that guy made some hand guns that fire metal slugs
  • 0


TechnoMancer
Corporal
Corporal
 
Posts: 64
Joined: Mon Jul 02, 2007 4:58 am
Location: Christchurch New Zealand
Reputation: 0

Unread postAuthor: hi » Sun Jul 29, 2007 12:18 am

it would take lots of tuning to ge right, but would be very cool.

here is an idea for a VERY simple one. (no, i have never built one and i am in no way a profesional)



take a peice of pvc (maybe 1/2'') and make a giant electro magnet about 1/2 way up the outside of the pipe and use that to shoot the medal darts. it would be cheap and it might work.

i like the idea though.
  • 0

"physics, gravity, and law enforcement are the only things that prevent me from operating at my full potential" - not sure, but i like the quote

you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
User avatar
hi
Major General
Major General
 
Posts: 1619
Joined: Thu Feb 01, 2007 9:28 pm
Reputation: 0

Unread postAuthor: uberlad » Sun Jul 29, 2007 12:25 am

Yeah, I might do that for another, larger, more rifle-like one, but the one I'm planning to make will be too small for darts, and probably have a straw-sized barrel. Good ideah though, thanks for your input.
  • 0

AY, LADS, BEVS ON ME!!!
LADSY!!!
User avatar
uberlad
Specialist
Specialist
 
Posts: 40
Joined: Sat Mar 17, 2007 12:46 am
Location: australia (the place with all the kangaroos)
Reputation: 0

Unread postAuthor: Mishkan » Sun Jul 29, 2007 12:30 am

The capacitors needed for a rail gun are huge. If you use more than one capacitor and acceleration point everything become much much harder. It's a challenge if you're up to it.
  • 0


Mishkan
Corporal
Corporal
 
Posts: 63
Joined: Tue Jul 17, 2007 11:31 pm
Reputation: 0

Unread postAuthor: hi » Sun Jul 29, 2007 12:39 am

i was looking around and this is accually very interesting, yet so simple.

some people made them using a camera flash curcuit, i was thinking maybe a stun gun would make it work well. would that work?


im just throwing out ideas.....
  • 0

"physics, gravity, and law enforcement are the only things that prevent me from operating at my full potential" - not sure, but i like the quote

you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
User avatar
hi
Major General
Major General
 
Posts: 1619
Joined: Thu Feb 01, 2007 9:28 pm
Reputation: 0

Unread postAuthor: TechnoMancer » Sun Jul 29, 2007 12:41 am

if you build a multi coil gun then you will need a timing system( a PIC or something) to make sure that the magnets are not left on too long and pull the slug backwards!
  • 0


TechnoMancer
Corporal
Corporal
 
Posts: 64
Joined: Mon Jul 02, 2007 4:58 am
Location: Christchurch New Zealand
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: Mishkan » Sun Jul 29, 2007 12:44 am

It is a lot more trouble than it is worth, I built a small one and it was rather unimpressive for the work that went into it.
  • 0


Mishkan
Corporal
Corporal
 
Posts: 63
Joined: Tue Jul 17, 2007 11:31 pm
Reputation: 0

Unread postAuthor: hi » Sun Jul 29, 2007 12:47 am

TechnoMancer wrote:if you build a multi coil gun then you will need a timing system( a PIC or something) to make sure that the magnets are not left on too long and pull the slug backwards!


that is why i suggested using only one coil, though that would be even more unimpressive.
  • 0

"physics, gravity, and law enforcement are the only things that prevent me from operating at my full potential" - not sure, but i like the quote

you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
User avatar
hi
Major General
Major General
 
Posts: 1619
Joined: Thu Feb 01, 2007 9:28 pm
Reputation: 0

Unread postAuthor: shud_b_rite » Sun Jul 29, 2007 1:11 am

I used to be into making them, I did a few experiments but never really put the money in to build a proper one.

There are a lot of things that can affect the performance of the gun, even a simple single coil gun needs to be timed correctly so that when the projectile is accelerated, the magnetic field is broken so it doesn't pull back the projectile. This can be done by either using some kind of sensor and timing circuit or decreasing the time taken for all the energy to be discharged.

That is why some people can make the most basic guns and some work really well and others don't, even though they all have the same basic components.

If you can make a good one it would be sweet as.
  • 0

Airbeds... so many different uses
User avatar
shud_b_rite
1st Lieutenant
1st Lieutenant
 
Posts: 290
Joined: Tue Jan 30, 2007 7:10 pm
Location: Auckland, New Zealand
Reputation: 0

Unread postAuthor: Pilgrimman » Sun Jul 29, 2007 1:30 am

If you want to build a coilgun, don't build it as a mini. It's very complex, and the gain is proportionately small. After you add the capacitor bank, it won't be a mini anymore! :D
  • 0

User avatar
Pilgrimman
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 481
Joined: Thu Jun 28, 2007 1:10 pm
Location: Grants Pass, OR
Reputation: 0

Unread postAuthor: jon_89 » Sun Jul 29, 2007 1:38 am

i dont think a stungun will work because you need amps and not volts.
  • 0


jon_89
Colonel
Colonel
 
Posts: 607
Joined: Wed Apr 11, 2007 9:50 pm
Reputation: 0

Unread postAuthor: Marco321 » Sun Jul 29, 2007 2:26 am

I built a small one out of a some plastic tube, some copper coils and a camera flash. Was easy to make and shot a nail across the room, but it wasn't that great. if you are good you can make a good one.
  • 0

User avatar
Marco321
Colonel
Colonel
 
Posts: 540
Joined: Tue May 15, 2007 2:56 am
Location: Sydney, Australia
Reputation: 0

Unread postAuthor: uberlad » Sun Jul 29, 2007 3:14 am

Pilgrimman wrote:If you want to build a coilgun, don't build it as a mini. It's very complex, and the gain is proportionately small. After you add the capacitor bank, it won't be a mini anymore! :D

In their most basic form, these are relatively smal and only need one capacitor, or a bank of small ones.

But i'l probably get stuck into this next weekend, because I'll be using this whole week for a 4000 word :shock: report for school: on combustion vs pneumatic spudcannons :wink:
  • 0

AY, LADS, BEVS ON ME!!!
LADSY!!!
User avatar
uberlad
Specialist
Specialist
 
Posts: 40
Joined: Sat Mar 17, 2007 12:46 am
Location: australia (the place with all the kangaroos)
Reputation: 0

Unread postAuthor: singularity » Sun Jul 29, 2007 11:17 am

i built one for the science fare last year shot assorted 1/4 metal slugs roughly 15ft at a 10 degree angle. it used a series of complicated homemade (and very fast charging) charging circuits at first but they kept on blowing my psu's so i eventually decided to use a camera flash. the capacitor bank contained two 1000uf 350v capacitors which took about 1minute to charge with the camera flash. i sharpened one of the projectiles and got it to shoot clear through a soda can. anyway if you plan on using like one camera flash/capacitor you might be able to shoot a metal bb or part of a nail 30ft at low velocity and a 45 degree angle of fire. i have made a few before but none of them were impressive enough to me to actually put ton this site. i think this winter im going to buy some Pic micro controller and build a decent multi stage gun.

through my experiments.... to get the best performance out of a coil gun you want maximum current. meaning low resistance wire (one of the most important parts) and a high voltage source (remember current is proportional to voltage... as a basic rule the more voltage you put in the more current you get out). if possible charge the capacitors in parallel and discharge them in series to get best result.
  • 0

be sure to check out my <a href="http://www.spudfiles.com/forums/ak-style-airsoft-vortex-gun-t10959.html">AK Styled Vortex Gun</a> and my <a href="http://www.spudfiles.com/forums/at-4-t9627.html">AT-4 Rocket</a>

upcoming projects... finalized clip fed BBMG and ball point pen sniper
User avatar
singularity
Brigadier General
Brigadier General
 
Posts: 982
Joined: Mon Jun 26, 2006 10:53 pm
Location: someplace
Reputation: 0

Next

Return to Non-Spudgun Related Discussion

Who is online

Registered users: Google [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'