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Advanced Combustion with Video

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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Advanced Combustion with Video

Unread postAuthor: Dornep » Sun Oct 14, 2007 8:05 pm

This is my third combustion and the second I've made which has a 4" chamber. I tried several new things on this cannon and I'm very happy with the results. There is still a lot of thing's to be done and touched up, but it fires and it fires HARD!

I haven't got a chronograph so I don't have any FPS numbers. I did however measure one shot with a measuring wheel at 683 feet. This shot was with a persimmon which sucks as a projectile as they spin and tumble downrange when they don't fly apart on muzzle exit. I'm positive I could get another 200-300ft with a better projectile and higher firing angle.

The barrel and chamber are both SDR-26 thinwall pipe. The Oatey brand 4oz primer and cement can's fit perfectly in the barrel. I have already shot my old primer can filled with water, and I plan to make a mold with the cement can.

I used a $1.67 personal/camping fan I found at WalMart as my venting and mixing fan.. I recommend that everyone try them at least once as you WON'T be disappointed. The fan moves a ton of air and you can hear it running inside the gun from several feet away. I plan to replace the end cap with a large ball valve and add some reducing tee handles some time next week.

32" Long 4" SDR-26 Chamber
86" Long 2" SDR-26 Barrel
Camping Fan for mixing/venting
BBQ Ignition with 1 Sparkgap... Will be replaced with sparkplug.

Future Upgrades.
HANDLES!
Different Sized Barrels
Sparkplug ignition gap
Possibly a Breech loading 2" Barrel
Bipod

I took a few quick pic's and recorded a couple shots I took at an old truck cab that belongs to my brother.

Video was originally fairly high res, after I uploaded it to youtube it looks like I took it with a cell phone..
[youtube]http://www.youtube.com/watch?v=QuizSV5XNzU[/youtube] :(
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Last edited by Dornep on Sun Oct 14, 2007 8:08 pm, edited 1 time in total.
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Unread postAuthor: TwitchTheAussie » Sun Oct 14, 2007 8:08 pm

This is a lovely combustion. Keep up the good work mate :thumbright:
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Unread postAuthor: HaiThar » Sun Oct 14, 2007 8:19 pm

Nice job. A paint job would do you some good. :P I have a question though...

Is the hose you are using for the propane injection pressure rated?

If so, where did you get it?

Again, nice cannon. Looks like it packs quite a bit of power.
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Kthx, BAI
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Unread postAuthor: Dornep » Sun Oct 14, 2007 8:38 pm

The section of hose that runs from tank to meter is fuel hose for cars so it should be good for quite a bit of pressure. I got it at Napa autoparts, I can't remember the exact price per foot but it was really cheap.

The section that runs from meter to chamber is LP gas line from a propane camping stove.

I'm glad you guy like the cannon, I might paint it once It's 100% complete. I feel like this cannon has more knock down power and range then any other cannon I have built so far. I love it!
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Unread postAuthor: LikimysCrotchus5 » Sun Oct 14, 2007 10:40 pm

Nice i plan on making a combustion like this pretty soon. I want to have a clear chamber and i see that these kinds of cannons, that you made, are pretty easy. :D
This will be my first combustion

P.S. What is that cannon next to the cannon in at 3.08 of the video. Looks like that cannon could do some damage 8)
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Unread postAuthor: Dornep » Sun Oct 14, 2007 10:53 pm

At 3:08, It's basically an 8ft long piece of 4" SDR-26, with a propane meter. Lobs propane bottles and small coffee cans between 200-300 feet. Has loads of energy point blank but not enough ass to really get anything flying.

Once I get everything tweaked out and get some more pic's and video I will update this thread with them.

Glad you guys like it.
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Unread postAuthor: DYI » Mon Oct 15, 2007 4:44 pm

Great gun, shame about the video.

I love Napa autoparts, probably the most useful store in my town. That's where I get my 3000 psi quick connects and 5800 psi PVC hose.
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Unread postAuthor: ninjafroglet » Mon Nov 12, 2007 1:39 am

sweet cannon :shock:
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