Boom! The classic potato gun harnesses the combustion of flammable vapor. Show us your combustion spud gun and discuss fuels, ratios, safety, ignition systems, tools, and more.
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rcman50166
- Corporal 2

- Posts: 697
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- Location: Bethel, CT
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Contact:
Thu Jan 14, 2010 2:04 am
Have you ever seen an ignition coil firing from a wall outlet. 120Hz cycle rate. I think it's more than sufficient. However it is obviously not very mobile. I can reccomend a battery fit solution, but it costs
$400+
Another solution is a
battery inverter with an AC ignition coil circuit. All together its around $200+. That's better

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Zeus
- Staff Sergeant

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- Location: 'Straya, C*nt
Fri Jan 15, 2010 12:12 am
Do you mean the triac phase shift circuit (light dimmer). I had one going
45uF cap, 4 inch sparks and it burnt plastic like a blowtorch.
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ramses
- Staff Sergeant 2


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Fri Jan 15, 2010 7:39 am
so you can spend $200 on a car battery, inverter, etc., or you could buy an electronic bbq ignition for ~$30 max. You choose.
POLAND_SPUD wrote:even if there was no link I'd know it's a bot because of female name

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ahabich
- Private

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rcman50166
- Corporal 2

- Posts: 697
- Joined: Sat Jan 19, 2008 7:11 pm
- Location: Bethel, CT
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Contact:
Fri Jan 15, 2010 1:49 pm
Zeus wrote:Do you mean the triac phase shift circuit (light dimmer). I had one going
45uF cap, 4 inch sparks and it burnt plastic like a blowtorch.
Yes that is what I meant. I use a microwave oven 1000uF cap.
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Zeus
- Staff Sergeant

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Mon Jan 18, 2010 9:28 pm
I hope you mean 1000nF otherwise I'd like to know what MO that came from.
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nibbler125
- Private 4

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Tue Jan 19, 2010 12:16 am
i have used a 9000 volt neon sign trantsformer before and it works great. but you need a spot to plug it in and it is very dangerous if it gets you
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Spudnyk
- Private 2

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- Joined: Mon Jan 04, 2010 2:28 pm
Wed Jan 27, 2010 3:52 pm
Electric BBQ lighters works great, very consistent good spark gap
runs off a AA battery you can buy them at Home Depot or Lowes 20.00 bucks. :sign4:
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McCoytheLesser
- Private 2

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Wed Jan 27, 2010 4:47 pm
If you have some RC batteries you might be able to try to make a
555 ignition circuit. I've built this exact circuit with great results and all the components are available at Radioshack, BUT it will drain small current sources in a heartbeat. Personally, for a spud gun, I'd just stick to the electric BBQ lighter or a stungun.