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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inlimbo
- Private

- Posts: 5
- Joined: Tue Dec 19, 2006 7:12 pm
Tue Dec 19, 2006 7:39 pm

Here is my first spud gun.
It is made of 3 inch abs reduced down to 1.5 abs.
I see alot of pvc spud guns but trust me I work with abs and pvc everyday.I yet have seen abs break.If you do use pvc make sure its shedule 80 as shed 40 is too brittle.[/img]
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Insomniac
- Sergeant 3

- Posts: 1297
- Joined: Mon Dec 18, 2006 3:47 pm
- Location: Australia
Tue Dec 19, 2006 7:49 pm
Can anyone else see the picture????? I can't
Is it the way he uploaded the pic or is it just my pc????
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PVC Arsenal 17
- Staff Sergeant 3

- Posts: 1762
- Joined: Mon Mar 27, 2006 4:18 pm
- Location: United States
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Insomniac
- Sergeant 3

- Posts: 1297
- Joined: Mon Dec 18, 2006 3:47 pm
- Location: Australia
Tue Dec 19, 2006 8:17 pm
hehehe I see it now. Looks good, but are they DWV fittings?? Take some more pics, I love the paintjob
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noname
- First Sergeant 4

- Posts: 2698
- Joined: Mon Apr 10, 2006 9:19 pm
- Location: Bay Area, CA
Tue Dec 19, 2006 10:40 pm
Nice gun, I like the paintjob.
Sch 40 PVC is fine, Sch 80 is too expensive and hard to get.
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Insomniac
- Sergeant 3

- Posts: 1297
- Joined: Mon Dec 18, 2006 3:47 pm
- Location: Australia
Tue Dec 19, 2006 10:50 pm
I agree with noname, sch 40 is fine, the only problem is its more likely to go KABOOM if you drop it while pressurised....But then sch 80 shrapnel probably hurts more than sch 40..... but this is a combustion so it won't go off if you drop it.
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noname
- First Sergeant 4

- Posts: 2698
- Joined: Mon Apr 10, 2006 9:19 pm
- Location: Bay Area, CA
Tue Dec 19, 2006 11:07 pm
Dude, any shrapnel is going to hurt like hell anyway, Sch 40 or 80. Just don't drop it. Plus, a normal combustion can't produce enough pressure to blow the PVC apart.
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Insomniac
- Sergeant 3

- Posts: 1297
- Joined: Mon Dec 18, 2006 3:47 pm
- Location: Australia
Tue Dec 19, 2006 11:20 pm
Yeah I know I was joking. Still, sch 80 is heavier and I suppose it would cut you deeper.
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inlimbo
- Private

- Posts: 5
- Joined: Tue Dec 19, 2006 7:12 pm
Tue Dec 19, 2006 11:29 pm
The are dwv fittings what I have done though is used 3" couplings and glued them togerther at the combustion chamber,that way everything is double walled making it stronger. on the back i used a 3by 2 reducer and a 2"fitting clean out.Lose less propane filling and easier to use than a 3 in ch.The handle on the 3 by 1.5 has been filled to stop any combustion from entering it protecting the trigger.
As for pvc I use it when plumbing ground services and when i just moving pipe around It tends to break. Abs I can through around the job site with no worries.
Shed 80 is exspensive but is found at most irrigation shops.
Will add more pics soon.
Thanks for the comps
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SpudBlaster15
- First Sergeant 3


- Posts: 2400
- Joined: Wed Oct 18, 2006 11:12 pm
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Wed Dec 20, 2006 12:45 am
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Last edited by
SpudBlaster15 on Wed Jul 14, 2021 12:34 pm, edited 1 time in total.
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noname
- First Sergeant 4

- Posts: 2698
- Joined: Mon Apr 10, 2006 9:19 pm
- Location: Bay Area, CA
Wed Dec 20, 2006 5:42 pm
It's also a little cheaper, which is nice when you get into 3" and 4" pipe.
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spit_spud
- Private 3

- Posts: 48
- Joined: Mon Dec 18, 2006 11:48 pm
- Location: manila
Mon Dec 25, 2006 2:55 am
2"is enough, its a big boom already, abs can also be used for combustion, much cheaper....
