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My new combustion cannon

Built a combustion cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Unread postAuthor: Kufive » Thu Jul 12, 2007 5:55 pm

nsane-spuds wrote:it's a electric BBQ igniter with red electrical tape


Where did you get it?
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Unread postAuthor: brother361 » Mon Mar 03, 2008 7:21 pm

wow that preety awseome
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Unread postAuthor: starman » Tue Mar 04, 2008 11:55 am

nsane-spuds wrote:what do you mean i didn't modify it i just cut the top pat of the torch and pushed the pipe over it... hop this answers your question :?


This will work for a while but you'll eventually have trouble with the hose slipping off, even with tight hose clamps...I've been there and done that. Get yourself a Mr. Heater propane tank adapter or one from BCarms you see advertising here. That way you can fit a proper barb and ideally a regulator on there.
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Unread postAuthor: the cats in the bag » Tue Mar 04, 2008 9:58 pm

great looking gun :D

but seriously whats with the laser :?


i give it an 8 :wav:
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Unread postAuthor: Carlman » Tue Mar 04, 2008 11:23 pm

the cats in the bag wrote:great looking gun :D

but seriously whats with the laser :?


i give it an 8 :wav:


the laser adds cool points, if someone wants to put on on his/her cannon then they can, ok?
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Unread postAuthor: ghostman01 » Wed Mar 05, 2008 12:38 am

all i really have to say is NASTY in good way of course lol v nice looking cannon it must be really loud due to that extreme c:b ........ hahahaha just imagine." ok its ready 3...2...1 ....... BOOM!!!! reeeeoooorrrrreeeeeor cops pull up ok son what you up to now !

lmao
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Unread postAuthor: frankbirds » Tue Mar 11, 2008 6:04 am

Hey mate,

Looks like a mean piece. Would love to build one myself but i am mechanically retarded without plans to work from. do you have any that you are willing to share, would be great. let me know please. :twisted:
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Unread postAuthor: tpcaudill » Thu Apr 10, 2008 9:22 am

nuclearspud wrote:By the way, how did you modify the propane valve (the torch valve) to accept a fitting?
When i made mine i didn't have to mod the propane valve at all. The neck just unscrews from the valve. 1/8 fpt i believe. I'll post pictures some time
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Unread postAuthor: lockmanslammin » Fri Apr 11, 2008 2:14 am

nuclearspud wrote:
By the way, how did you modify the propane valve (the torch valve) to accept a fitting?
When i made mine i didn't have to mod the propane valve at all. The neck just unscrews from the valve. 1/8 fpt i believe. I'll post pictures some time


When I made mine, I just cut the curved part off, and used a pipe thread die to cut pipe threads into the brass. Worked good.

Lock
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Unread postAuthor: biggsauce » Fri Apr 11, 2008 10:49 am

tpcaudill wrote:
nuclearspud wrote:By the way, how did you modify the propane valve (the torch valve) to accept a fitting?
When i made mine i didn't have to mod the propane valve at all. The neck just unscrews from the valve. 1/8 fpt i believe. I'll post pictures some time


Are fpt threads compression fitting threads? I remember going to ACE and asking for a compression fitting to thread into a propane vavle, but all that did was confuse the poor guy that tied to help me.

Some pictures would be great
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Unread postAuthor: ThatsMasterToYou » Sat Apr 12, 2008 10:10 pm

Thats A Nice clean looking Gun nice job :wink:
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Unread postAuthor: tatermasher » Thu Apr 17, 2008 7:47 pm

So did you just buy that PVC or ABS or whatever it is at like a hardware store like home depot?
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Unread postAuthor: hansom72 » Tue Apr 22, 2008 3:45 pm

Nice Cannon!! I'm new to spudfiles and i'm building a propane injected cannon similar to this one. I'm curious to how you figured out the size of your metering pipe to your chamber size??? Does your cannon fire every time or do you experience mulitple misfires with it?? I have already built a few hairspray cannons, but i'm looking for more power and reliability. Is Propane going to be a better way to go??
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Unread postAuthor: nsane-spuds » Tue Apr 22, 2008 4:11 pm

Wow, its been a long time i haven't been on the combustion cannon of the forums...

Kufive wrote:Where did you get it?
Home Depot

frankbirds wrote:hahahaha just imagine." ok its ready 3...2...1 ....... BOOM!!!! reeeeoooorrrrreeeeeor cops pull up ok son what you up to now !
Lol, that already happened twice :shock:

tatermasher wrote:So did you just buy that PVC or ABS or whatever it is at like a hardware store like home depot?
Yes

hansom72 wrote:Nice Cannon!! I'm new to spudfiles and i'm building a propane injected cannon similar to this one. I'm curious to how you figured out the size of your metering pipe to your chamber size??? Does your cannon fire every time or do you experience mulitple misfires with it?? I have already built a few hairspray cannons, but i'm looking for more power and reliability. Is Propane going to be a better way to go??
I didn't do any calculations to find the right sized pipe for the propane petering system, I simply built it with what i had lying around in my basement and then did the calculations to find the right pressure i needed to use. And yes, propane is the way to go.

Btw, for finding the right pressure i used these tools: http://www.burntlatke.com/calc.html
And also, for everyone who asked for plans, go to this site, it has a lot of information on combustion spud guns: http://www.burntlatke.com/build.html

If you still have questions let me know...
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Unread postAuthor: starman » Tue Dec 02, 2008 10:35 am

that_guy wrote:what is the fan for venting the gun out after firing ?


that_guy, please don't kick up old subjects.

The fan is for ventilating before and after a shot, and mixing the fuel/air during a shot. As was recommended in the post above, go to BurntLatke and bone up on some advanced combustion principles.
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