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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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MikeNice
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Sat Dec 08, 2007 4:25 pm

This is my most recently completed cannon. It's actually a Christmas Gift for my step brother back east. My Step mother asked me to build it for him and put a nice paint job on it. Hope ya'll dig it. This has become a pretty standard cannon for me, I've built a bunch of them, themed them in different paint jobs and either given them as gifts or sold them. Some of you may remember my Harley Davidson cannon. This was a gift to my uncle in Kansas.

http://www.spudfiles.com/forums/viewtop ... html#48198

Anyway, the cannon a 1.5:1 animal, 4"x18" chamber with a 2"x48" barrel with a barrel knife, dual spark BBQ igniter, internally wired, forward handle, and a threaded union. Very reliable and very powerful. This one is spray and pray with Static Guard because this is the recipient's first cannon.

Hope ya'll can dig it.
Attachments
This is looking down on the left hand side of the gun to show the forward handle, flames, and ignition screws in the chamber.
This is looking down on the left hand side of the gun to show the forward handle, flames, and ignition screws in the chamber.
This is the right side of the canon showing the flames and the igniter assembly.
This is the right side of the canon showing the flames and the igniter assembly.
Here is a close up of the igniter mounted in a t-coupling with 2 end caps. You can also see where the wiring breaches the chamber.
Here is a close up of the igniter mounted in a t-coupling with 2 end caps. You can also see where the wiring breaches the chamber.
Here's the dual-spark I'm getting in the chamber, pretty consistently.
Here's the dual-spark I'm getting in the chamber, pretty consistently.
Finally a pic of me with the cannon, I just put this here to show you scale of the gun. It's kind'a big.
Finally a pic of me with the cannon, I just put this here to show you scale of the gun. It's kind'a big.
Last edited by MikeNice on Sat Dec 08, 2007 4:42 pm, edited 1 time in total.
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SpudUke5
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Sat Dec 08, 2007 4:31 pm

Wow, beautiful :wav:

such a nice paint job for a "spray n pray" combustion. Very nice gift indeed.

wonder if you could send one my way :idea:
not really

EDIT: Why did you take the pics out?

Well its fixed now. But i do like your ignition also. Copper wire is a good idea. Man i gotta try that sometime. :D
Last edited by SpudUke5 on Sat Dec 08, 2007 4:46 pm, edited 1 time in total.
4SPC, My 4" piston 3" porting cannon
Memo:
Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
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MikeNice
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Sat Dec 08, 2007 4:43 pm

I was just changing the order and adding another one.
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Sat Dec 08, 2007 5:02 pm

You put some sweet paint jobs on your cannons! Somebodies getting lucky for christmas.
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Sat Dec 08, 2007 5:23 pm

love it man you always do good on your cannons this one looks so clean
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Sat Dec 08, 2007 5:53 pm

When i looked at the first pics i thought, KICK ASS! Thats one sweet medium sized cannon. Then comes the pic of you holding the beast, just a little larger than what my brain told me in the first instance :D I would be very proud indeed to own such a launcher.
Now for the proverbial "stick in the mud. Just one little thing that i would "modify" if i may say so is to cover those exposed ignition wires, it seems as though they could be accidently ripped off easily.
That however is a drop in the ocean compared to the rest of the construction.

Very nice indeed :P
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MikeNice
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Sat Dec 08, 2007 6:10 pm

The ignition wires would at worst get pulled off the screws on the outside of the chamber. No biggie, just put them back on. Behind the holes in the T coupling the wires are knotted, they're not getting pulled out of the igniter assembly. Glad you guys like it. I always hate letting them go. I love every cannon I build.
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gwoloshyn
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Sun Dec 09, 2007 12:39 am

Do you need a barrel support or is it pretty sturdy as it is? Nice cannon !
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Sun Dec 09, 2007 1:05 am

gwoloshyn wrote:Do you need a barrel support or is it pretty sturdy as it is? Nice cannon !
Good point, you would not be happy if that 90 degree snapped :(
I suggest using some kind of spacer in between the chamber and barrel, plus a red zip tie to hold everything together.
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When you fill your car with refined oil remember that it has been paid for with blood and guts, some from your own countrymen, most not.
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MikeNice
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Sun Dec 09, 2007 12:17 pm

Do you need a barrel support or is it pretty sturdy as it is?
I've never used a barrel support in there and it has never been a problem. None of the guns I've built have ever had one and you're actually the first to ever suggest it. It's really pretty durn sturdy as is. Granted if that elbow broke I'd be pretty screwed. (180 degree elbow) :wink:
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