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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: bigbob12345 » Sat Mar 29, 2008 7:38 pm

Great job
It is one of the most ascteticly pleasing combustions on this sight in my opinion.

all it needs is some propane metering and you should be golden :)
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Unread postAuthor: Spuddin » Sat Mar 29, 2008 7:50 pm

elitesniper wrote:Thats NICE!, I see you used that grip on that how-to eh :wink: , I love that sight+ its really clean, you should try to squeeze in a fan if you could.

you read my mind, today i pulled out 2 small fans from a old pc but i have no room cause of the breech loading, if i used a 3" T it would work perfect :?
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Unread postAuthor: elitesniper » Sat Mar 29, 2008 7:53 pm

maby a some ball bearings in the chamber, then you can shake up the cannon before firing. :)
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Unread postAuthor: starman » Sat Mar 29, 2008 8:02 pm

There's another coax [partial it looks like] combustion shoulder fire...these things are becoming the rage it seems. Nice detail work.

Metered propane need not be difficult...several options are available to you. Here's one I was showing rcman:
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Biggrib calls this a 2 stage meter, I think they are all basically 2 stage...this one just isn't permanently attached to your gun. Anyway, snap the "hypo" in the propane system to charge it, disconnect and snap into your quick-connect on your gun, unload the contents, fire away. Keep several on hand and charged up for a quick reload time.
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Unread postAuthor: scottcrete » Sat Mar 29, 2008 8:27 pm

i swear dude.. the 5th picture down you posted.. looks like a uzi.. submachine gun.. when you cant see the back of the chamber.. lol

I love it.. great job..
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Unread postAuthor: BOMBOMBOMB » Sat Mar 29, 2008 8:43 pm

KA%$^%$BOOOOOOOM yehawwww. :P likey likey likey likey KABOOOM HEHE. That gun makes me happy.
NATO
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Unread postAuthor: elitesniper » Sat Mar 29, 2008 8:45 pm

uh, don't do that :roll:
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Unread postAuthor: LikimysCrotchus5 » Sat Mar 29, 2008 9:49 pm

Starman i really like that design and i think that i am going to do that for my hybrid propane meter, is there really any difference compared to a normal fuel meter?

I like this because it makes the gun less bulky and more portable and you can use the same meter for different guns, its really a great idea, thx.
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4SPC, My 4" piston 3" porting cannon
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Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
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Unread postAuthor: starman » Sat Mar 29, 2008 10:30 pm

LikimysCrotchus5 wrote:Starman i really like that design and i think that i am going to do that for my hybrid propane meter, is there really any difference compared to a normal fuel meter?

I like this because it makes the gun less bulky and more portable and you can use the same meter for different guns, its really a great idea, thx.


No difference, works the same way. Calculate the meter volume just as you would the 2 ball valve type...only this one uses the same valve to charge and discharge. Just set the regulator for the propane PSI you need...you can literally load one up in 5 seconds...pop it on, open/close the valve, pop it off....it's ready to go. Just keep an eye on the regulator meter that it stays the PSI you need...these can drift some, but not terribly bad.

Meter volume was really easy to measure, just fill with water and measure the water amount after emptying. I used a medical syringe as my measuring tool. This one you see holds 36 cc.

The meter "hypo" shown is only $6-7 each. Big advantage is the propane tank system is portable between guns, so only a one time cost for it. Actually, I like the 16 oz camping tanks of propane for these better than the long 14 oz Bernzomatic tanks.
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Unread postAuthor: LikimysCrotchus5 » Sat Mar 29, 2008 10:37 pm

Well now how about for a hybrid? How much are quick disconnects rated for? Cause i would like to take my hybrid up to par (5x-10x).

I would make this out of black steel, and i would put a schrader rather than a cap, so that i can push the propane through. But i have a question pertaining to SB15's air through meter. Since you put air in the meter, dont you have to add another atmospheric mix of propane through the meter, so that you can equal out the mix?

But its a great idea, i think im gonna take apart my current meter, and buy a quick disconnect and make this meter.
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4SPC, My 4" piston 3" porting cannon
Memo:
Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
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Unread postAuthor: starman » Sat Mar 29, 2008 10:55 pm

1000 psi or so. These things are designed to feed and hold back some serious air pressure. They are the standard connections that are used on air compressor outputs. You should be in good shape on any real world hybrid.

Re your question about air through the meter... Yes assuming it originally had all the air purged and was thoroughly propane primed, you would need to take into consideration an extra bar of propane in the meter.
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Unread postAuthor: scottcrete » Sun Mar 30, 2008 12:43 pm

im not sure if any of you know.. but if you go to this website call...

electronic goldmine..

they have several electonic parts that most of us would love to have but are to expensive to buy at most stores.. i bought 6 fans (for chambers from them) for about 8.00 total.. and also.. i bought their surpise box the other day.. and let me tell you.. it is definately worth the 5.00 they charge for it.. purchased seperately what is in it.. i would say is aroun 80.00.... you have to check out their site.. and look att the stuff man...

they reason why i happen to be rambleling on like so.. is cause i seen where some of you said to put a fan in this guys gun.. and they are like 17.99 at radio shack.. this electronic goldmine has the exact same fans.. which i have now.. for 1.00 to 3.99 each..

why pay more.. when you can pay less..
just let me tel you though they are on their "own schedule" it seems as if they take forecer to mail your stuff.. so you have to wait for it..

but its quality brand new goods.. at a really cheap price..
well worth the look at mates..
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Unread postAuthor: LikimysCrotchus5 » Sun Mar 30, 2008 12:48 pm

Thx starman i probably will just use this meter all the time (as soon as i get it done)

Scottcrete, can you give us a url? But from the looks of it sounds like a good website, because i dont get that much money either so this would be a big consideration for me.
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4SPC, My 4" piston 3" porting cannon
Memo:
Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
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Unread postAuthor: Squerl101 » Wed Jan 23, 2013 3:23 pm

This is such a beautiful looking gun, I love everything about it.
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Unread postAuthor: Cy4ka » Thu Jan 24, 2013 9:07 pm

Very cool idea! I had thought of something similar but I scrapped the idea for another and am going to just use a regular pipe and igniter to launch engine rockets from.
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