Need suggestions for top shelf combustion

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.
User avatar
Maniac
Specialist 4
Specialist 4
Posts: 496
Joined: Tue Oct 23, 2007 5:55 pm
Location: Right behind you

Fri Jun 13, 2008 7:53 pm

Amen!
I know what you mean. Foe inter changeable barrel try to use cam locks the serve as breech loading and a small burst disk holder. It maybe harder to find cam locks for a 4in barrel which are so much fun (friend just got one, been shooting softballs, I see why pitbull loves em so much) but I have seen them for 4in pipe before so they are out there.
Coodude26 wrote:
People who laugh really hard at stuff that pisses you off/you getting hurt, who then say "I'm sorry, I can't stop" but you know they easily could.

Mr.C: That's not as easy as you think. It's like me kicking you in the balls and telling you to stop crying.
User avatar
DYI
First Sergeant 5
First Sergeant 5
Antigua & Barbuda
Posts: 2862
Joined: Sat Jul 07, 2007 8:18 pm
Location: Here and there

Fri Jun 13, 2008 9:24 pm

Geez guys, where's your creativity?

You don't need to buy fittings! Why would you for a gun that won't even be generating over 90psi or so? Cast your own caps and reducers out of fiberglass.

Get the longest chunk of the biggest pipe you can find to use as the chamber, and then reduce down to 8" so that your ammo doesn't weigh hundreds of pounds.

Inline will make for more power, and it doesn't seem as though high portability is a priority here. It also means much less complex fiberglass castings.

As for ammo, cast ice or concrete always works, or shotgun type loads of vegetables with towels for wadding.
Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.
User avatar
starman
Sergeant Major
Sergeant Major
United States of America
Posts: 3027
Joined: Wed Dec 12, 2007 12:45 am
Location: Simpsonville, SC

Donating Members

Sun Jun 15, 2008 9:40 am

spudmatic wrote: And starman I realize that the bell reducer is a bad idea but it is very hard to find fitting for bigger pipes especially pressure rated. I looked into 6in and found the stuff I would need but, the 90 degree elbows would cost me about $30 a piece :cry: .
That bell reducer you linked to is a 5" to 4" model. 5" is a nonstandard size for pressure rated PVC. This part is useless for what you are looking to build.

6" is your next practical size up from 4" if you are really looking to go big. Are you sure you are ready to deal with the logistics and costs of building, transporting, mounting, and fueling such a beast?
User avatar
spudmatic
Private 2
Private 2
Posts: 32
Joined: Fri Apr 11, 2008 5:11 pm

Sun Jun 22, 2008 9:39 pm

Sorry I waited so long to reply guys my computer crashed :cry: . Flone and maniac I am going to take both those suggestions into consideration. And starman this is going to be a slow build not a buy everything at once. And finally DYI were you being sarcastic with that post?
The definition of spudcannon should include combustion, if I wanted to shoot a pneumatic I'd go get my paintball gun.
User avatar
DYI
First Sergeant 5
First Sergeant 5
Antigua & Barbuda
Posts: 2862
Joined: Sat Jul 07, 2007 8:18 pm
Location: Here and there

Mon Jun 23, 2008 3:33 pm

And finally DYI were you being sarcastic with that post?
No... Why would you think that? I generally use the "rolling eyes" smiley or something similar to indicate sarcasm over the internet.

My idea would be a lot cheaper, not to mention more powerful than most mentioned here. The fiberglass castings do work quite well, I've used them myself.
Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.
Post Reply