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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: frocksie » Sun May 20, 2007 8:47 pm

The new barrel is 1.5in, so due to the small mass of a potato, the kick is virtually gone. I will try to get some pictures up soon.

The way I fuel it is spray fuel in the half with the barrel and then screw the other half on.

I had forgotten about this thing as I am working on a piston valve, but this thread reminded me, so today I pulled it out and fired off a couple of potatoes. This is possibly more powerful than my pneumatic at 60psi.
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Unread postAuthor: l31ack-Jak » Thu May 31, 2007 4:12 am

This is a sick cannon, Me and my friend came up with a really good idea to make the same cannon but a exact replica of the RPG-7s that the Russians used in the cold war, There is a few problems with the blue prints & weight but apart from that we still don't know what metal to use (We don't want PVC due to we want a long lasting cannon). After its completed we will shove it on here, also i know it must be a pain but is this one hell of a powerful gun?
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Unread postAuthor: frocksie » Sat Jun 02, 2007 7:44 am

Yeah, it is really powerful. The upgrade that increases power the most is a camping fan.

Building one out of PVC wouldn't shorten its life if used properly. Also, metal is heavier, and you must insulate the screws if you want a spark. If I were you, I would use PVC, but good luck with your cannon.
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RPG-7D

Unread postAuthor: l31ack-Jak » Sat Jun 02, 2007 7:56 am

The upgrade which is the camping fan... sorry but im a bit of a noob at this stuff.... the camping fan goes at the back? or int eh chamber?

Yes and plus our metal RPG-7D is breakable so we can spray in the deodorant as we have gotten blue prints of an old SOVIET RPG-7D Airborne version which breaks into two bits one our chamber the other our barrel =] It may be heavier but it looks real... and sounds real...

Also would anyone have any ideas on how to get a big pile of smoke to fly out the back if possilble?


Thanks, l3lack-Jak =]
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Unread postAuthor: frocksie » Sat Jun 02, 2007 7:15 pm

For smoke, you could put a small hole in the back of the chamber, and over the hole, put a pouch full of flour over it. The walls of the pouch could be made of paper towel, so the combustion blows flour out the back end. Sorry if this is hard to understand.
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Unread postAuthor: l31ack-Jak » Sat Jun 02, 2007 9:39 pm

Is that the only way you can make smoke come out the back, If so i wont even bother reloading it every time... it will still look pretty good with the design and all. Also can some one please tell me where this so called camping fan is placed on the gun???

Thanks, l31ack-Jak

=]
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Unread postAuthor: frocksie » Sun Jun 03, 2007 8:19 pm

No, thats not the only way to get a smoke effect, in fact I don't even know if that would work, I just thought it up.

The camping fan is placed towards the rear of the chamber. The point is to mix the fuel to an even distribution, so it will burn more efficiently. If you want a powerful combustion gun, you really have to have a camping fan or computer fan. Also, the use of a fan makes the gun far more reliable, and no longer makes the gun a spray-n-pray.
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Unread postAuthor: tomthebomb137 » Thu Jun 14, 2007 9:19 pm

yah, i built this shoulder fired paintball rocket launcher, its pnuematic and at 70PSI on the first test it flew out of my hands lol. The whole systems rated to 150. I havnt gone there yet. These things are VERY powerful
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Unread postAuthor: SnowFlox » Sat Jun 16, 2007 10:53 am

Love the Rocket Launch position !
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Unread postAuthor: nuclearspud » Sat Jun 16, 2007 10:00 pm

You should paint that with some Olive drab spraypaint. Would look nice.
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Unread postAuthor: frocksie » Fri Jun 22, 2007 7:39 am

Couldn't find any, so I decided to go with desert sand beige. It is pretty hard to see in the pictures, but it works well with the stained handles.
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Unread postAuthor: mark0491 » Wed Jun 27, 2007 6:42 am

awsome cannon i would paint it olive drab , youyr dad has a james bond look to him Any was sic sannon 5 stars in my book
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Unread postAuthor: NewB » Wed Jul 18, 2007 12:08 pm

Nice.
I love the rocket launcher look. It would look cooler with a dark green paint job :)
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