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| jimmy101 |
 Posted: 10/17/2007 13:26 PM Post subject: |
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Major General
Joined: 28 Mar 2007
Posts: 1759
7452.36 Spud Bux
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So you are using a transformer on a 120V main as the power source?
A fuse or circuit breaker, or better yet a gound fault interuptor, would be a good idea. |
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| Panzerfaust |
| Posted: 10/23/2007 19:21 PM Post subject: |
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Staff Sergeant
Joined: 17 Apr 2007
Posts: 128
478.37 Spud Bux
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| Though i know little about electricity, i made a couple small coilguns and did alot of research on them. With those two big-ass capacitors, you definitely need a better launcher. That other guy (to lazy to quote) was entirely right when he said that your capacitors need to be discharged by the time your projectile is halfway through your coil, otherwise the magnetic field starts sucking your projectile backwards instead of forwards. During my research i looked up the formula for the magnetic field of a wire coil, and a short fat one is more powerful than a long skinny one. I actually tested this by making a 1.5" thin wire coil and a .75" fat wire coil and the fat one worked better. You will get much better performance i think if you make an overall bigger coil. Fatter to increase overall force, and longer so that your big capacitors have time to discharge before your projectile moves too far. |
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| spudling |
| Posted: 10/23/2007 19:43 PM Post subject: |
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Specialist
Joined: 27 Oct 2006
Posts: 48
0.36 Spud Bux
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| true i have 6 others coils and im making a final coil with inferred sensors at the rear the theory is the if the projectile is 2/3 the length of the coil and you have the sensors at the rear than by the time the projectile reaches the center it will no longer disrubt the inferred sensors thus "killing" the power to the coil. |
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| spudling |
| Posted: 10/23/2007 21:33 PM Post subject: |
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Specialist
Joined: 27 Oct 2006
Posts: 48
0.36 Spud Bux
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| Other than the capacitors witch i bought online at NEWWARK.COM,I have ether got at frys electrons,Marvac,or radio shack. Im planing on buying a S.C.R. online somewhere around 800v PM me for more questions |
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| ammosmoke |
| Posted: 10/23/2007 22:01 PM Post subject: |
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Brigadier General
Joined: 27 Sep 2006
Posts: 957
1717.32 Spud Bux
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Meh, how about a few of these...
The company is great, I have done some business with them, and my friend's dad has done extensive business with them with no problems.
EDIT: Or these....
here
EDITEDIT: The second one has the same voltage, but a lot more charge. |
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| that_guy |
| Posted: 05/29/2008 12:57 PM Post subject: |
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Private
Joined: 29 May 2008
Posts: 1
6.53 Spud Bux
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| IM 13 to iv made 5 coil guns i would like more impute on them im using 4 photo flash capacitors from a camera where did you get your capacitors |
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| Xerxys |
| Posted: 05/29/2008 13:10 PM Post subject: |
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Private
Joined: 18 May 2008
Posts: 20
56.48 Spud Bux
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Thirteen eh? I am of a similar age...
How many Spud guns have you built?
P.S. what's your I.Q. (or is that a personal question?) |
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