V-C4 Combustion Cannon

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.
VinnyC
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Thu Apr 27, 2006 5:39 pm

Here are some pictures of my latest creation, the V-C4. It has a 100,000volt ignition, 7 sparking points, a 1:1.5 ratio, two handles, saftey switch, power switch, battery gauge, storage compartment, removable barrel, and much more! Tell me what you think! And yes it fires great! (these pictures are the most recent ones I have. I have modded it slightly since these were taken.)

THE BARREL IS OBVIOUSLY NOT PICTURED! It screws onto the top chamber. The lower chamber is for storage and what not.

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CS
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Thu Apr 27, 2006 5:52 pm

Nice gun! But if you had all that space in the "handle" part, why not put it all inside? What in the hell is the screwdriver for?
VinnyC
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Fri Apr 28, 2006 9:50 am

Well, the screwdriver is so you can dismantle the gun! The hose clamps can come off, and by disconnecting the wires (not pictured) the gun be broken off into 3 pieces. Also, the front-most handle can be rotated 90 degrees if one so desires. I forgot to mention that before. Also, the storage space is mostly taken up by the right guard canister and the teflon tape roll. The rear storage chamber has the back of the taser in it, so you can turn it on or off in there. That part isn't open.
Benny
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Fri Apr 28, 2006 11:28 am

real nice gun, reminds me of the killzone rocket launcher. :D
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teledu
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Sat May 13, 2006 3:11 am

What is the size of the barrell ?
VinnyC
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Sun May 14, 2006 12:01 am

The barrel is 4ft long @ 1.5". I did all the calculations to get "exactly" a 1 to 1.5 ratio.
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Zamamee
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Wed Jun 07, 2006 3:22 pm

WOW :shock: I really like this gun, it must have taken you a while to make! All the accesories are sweet, the battery gauge is certainly unique, and everything else is impressive too.
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)DEMON(
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Wed Jun 07, 2006 3:37 pm

I bet you can put a propane injection system in the lower compartment.
Forever dreaming...
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frogy
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Wed Jun 07, 2006 4:42 pm

That's what I thought was in their at first Demon.... a Propane tank would propably fit into that pipe good... 3'' NSF-PW?
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VinnyC
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Thu Jun 08, 2006 3:36 pm

I actually HAVE added a propane tank w/ a clear hose running from the front of the gun into the back of the top chamber now. All the appropriate fittings and valves make it look pretty good. Unfortunatley, this propane rarely if EVER ignites! I have 7 sparking points inside of the chamber, and it is 100,000 volts, but rarely anything happens.

Am I doing something wrong with the propane? I have tried adding a fan, but that didn't help. Yes all the fittings are sealed, I have checked that too. Seems that good old right guard still works the best (doesn't look as cool though).
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frogy
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Thu Jun 08, 2006 3:56 pm

Most likely your Propane\Air mixture is over %4.2 propane which causes bad igntion, or it could be much less than %4.2 propane

I doubt it's leaks in the gun, maybe dip the propane igjection in water while pressured... check for leaks
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