Step back in time cannon.

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.
SpudBlaster15
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Thu Nov 30, 2006 2:07 am

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Last edited by SpudBlaster15 on Wed Jul 14, 2021 12:17 pm, edited 1 time in total.
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rna_duelers
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Thu Nov 30, 2006 4:35 am

Propane injection..Bahh I much rather this all I use is some butane from a portable stove and a spray nozle off a spray deodorant can,works a charm and its cheap aswell.

Well its a little to hot to grow spuds here,and humid aswell they would surely die this time of the year.But I do shoot home grown limes not to mention they are round so they fly better.

Spudblaster-Just do it,i forgot how much fun the simple spudders life was.
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joannaardway
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Thu Nov 30, 2006 4:57 am

<smartass>

It looks like you've got some un-rated parts in there. It's very nice for a basic spudgun, but those off-set bushings are a mark of unsafe parts.

</smartass>

Joking aside, I commend you. Most people (myself included) wouldn't actually have the courage to take the steps back to an old skool design(except if they were bored, and built a ghetto cannon from random crap they found)
Novacastrian: How about use whatever the heck you can get your hands on?
frankrede: Well then I guess it won't matter when you decide to drink bleach because your out of kool-aid.
...I'm sorry, but that made my year.
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rna_duelers
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Thu Nov 30, 2006 5:02 am

I will pretend you "smartass" didn't slip out of the bag.

But then again they do pose a bit of a danger sometimes they blow out but thats why its facing away from me,not towards me :wink: .
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flamerz14
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Fri Dec 01, 2006 12:15 am

how did you join the barrell to the chamber? just cut a hole or screw?
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rna_duelers
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Fri Dec 01, 2006 7:16 am

It is an Australia DWV fitting and thats how it was produced so that if it was to be used in a situation were the pipe was running down a wall it would sit flush against the wall when it was increased to the 100mm size instead of sitting 50mm away fromt the wall.

I think everybody should give this a go.Get the good old cheap parts and make and 'old school' combustion gun.And yes that includes you sgort,Sir combustalot.
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ballad of NJ
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Tue Feb 13, 2007 8:12 pm

I remember thoes days! When I didn't know the differance between NSF-PW and NSF-DWV...[/quote]

i still dont know the difference thats why im so confused.
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jrrdw
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Tue Feb 13, 2007 8:27 pm

I still think any made out of pvc is modern, i retyped this to be able to get rid of the notify me when a reply is posted, i have to submit something.
Matheusilla
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Tue Feb 13, 2007 9:11 pm

Reminds me of one of my very firs combustors... I made it out of ABS, but sealed the back and front with tin cans and silicone sealer. It had a 12" piece of 1.5"dia. tube for fuel inlet, I would just cover it with my hand to fire after filling it. Eventually (after about 20 shots or so) the silicone started to tear and come apart a little more after each shot. I was losing velocity shot after shot and didn't know why until I noticed that I was kinda' burning the hair on my hand and arm (lol). I probably shot it another 10 times more before I realized what was happening. That is my old school story (and I'm stickin' with it :D ).
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gotbass7
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Sun Mar 11, 2007 10:40 pm

ok im new to this site and new to making these. ive been working on one its basically pvc pipe attachted to a thing of purrel but how should i ignite it? i thought i could drop a match but i dont think that would be the best thing. i would appareicate any suggestions
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A-98
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Sun Mar 11, 2007 11:05 pm

my suggestion is to search the wiki.

ugh, i hate being mean to noobs. use a BBQ sparker.
There are rules, and then there are hundred dollar bills.
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gotbass7
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Sun Mar 11, 2007 11:35 pm

ok thanks. i thought a bbq sparker but like i was wondering if i could usesomething else
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A-98
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Mon Mar 12, 2007 12:58 am

ive sorta done the same thing recently. today i started on a mini cannon, which may not seem to amazing, but i havent built a mini cannon in ~2.5 years, so ive got some nostalgia coming up!
There are rules, and then there are hundred dollar bills.
AmYisroelChai
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Wed Apr 11, 2007 8:04 pm

Your still building a modern cannon, the true days of old is when you use 2 tennis ball cans, duct tape, zippo lighter fluid and a match. Any cannon made from pvc is modern.
LoL...I did this for my first gun I got a flame thrower instead. My dormate laughed for hours when my "Cannon" went up into flames...
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Bubba05
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Wed Apr 11, 2007 8:55 pm

Ahh reminded me of my first cannon. good for a bang didnt go far and ended up singeing my m8 eye brows off!! :lol: The good ole days!
Great job mate!

Bubba
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