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Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
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Unread postAuthor: FeLeX » Sat Apr 07, 2007 12:11 am

I am very sorry for my noobieness but whats DDT stand for? Dieseling something?
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Unread postAuthor: frankrede » Sat Apr 07, 2007 12:13 am

fom wrote:
frankrede wrote:I refuse to accept that theory.
I have never heard or seen cell core abs fracture under normal circumstances.
His pipe must have been defective or had some irregularity.


How many people use cellular core ABS in combustions? Barely any from what I have seen. And its almost impossible to have a defect in a pipe, in the factory they check the pipe with really high tech stuff. And ABS is very durable, it would not crack or anything when dropped.
Cellular core is fine for a barrel but not chamber.


Your an idiot.
Cellular core ABS is more common than solid wall.
I have built 3 cell core abs cannons and have put hundreds of shots through them. Not one has had any sign of failure or weakness.

One gun fails and everyone flips out and immediately make the pipe the devil?
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Unread postAuthor: frankrede » Sat Apr 07, 2007 12:24 am

FeLeX wrote:I am very sorry for my noobieness but whats DDT stand for? Dieseling something?
Deflagration to Detonation Transition
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Unread postAuthor: crsaz » Sat Apr 07, 2007 10:25 am

is ddt even possible in a reguler combustions? I thought it was hybrids
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Unread postAuthor: Fnord » Sat Apr 07, 2007 10:57 am

With normal propane/air, no.
I guess if you use something like acetylene or hydrogen with a large chamber it is possible, but it obviously wont be good for your health.
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Unread postAuthor: SpudBlaster15 » Sat Apr 07, 2007 11:48 am

DDT can occur in a propane/air mixture, but the pressure vessel would have to be extremely long, far more than is practical.
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Unread postAuthor: sjog » Sat Apr 07, 2007 6:28 pm

CRSAZ Hey dude or dudette:
Did the projectile exit the barrel????????????????????
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Unread postAuthor: crsaz » Sat Apr 07, 2007 6:50 pm

thats Mr.dude to you ha ha just kiddin

yeah it left but it did't go more tah 40 feet up
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Unread postAuthor: Bubba05 » Sat Apr 07, 2007 7:40 pm

Hummm then the falure hapened after the projectile started to move up the ballel. Preasure got to great at the last second or .0002 of a second.
Im laying out Hand of god on this one m8. Dont give up S@%T happens hey.

Bubba
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Unread postAuthor: sjog » Sun Apr 08, 2007 5:10 pm

OK Mr.dude it is . I was very interested in your story and I'm glad you were not injured. Every one on the site went into an uproar over the
materials that were used or could be used. The debate on cell core,ABS,
PVC and everyother thing we can make launchers with.
I thought it was important to find out if the projectile exited the barrel.
Do you think that your load jamed in the barrel and did not exit properly? Since the load only flew 40 ' was it jamed or did the gun fail first.
In a shot gun all it takes is some snow stuffed in the barrel to have failure of the barrel. I saw it happen once on a rabbit hunt.
I hear all the time people wanting to stuff things down their barrels that might not end up flying.I think that could blow up a combustion launcher
like the shot gun. Frankrede says no, I'm not so sure.
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Unread postAuthor: fom » Sun Apr 08, 2007 5:36 pm

frankrede wrote:
fom wrote:
frankrede wrote:I refuse to accept that theory.
I have never heard or seen cell core abs fracture under normal circumstances.
His pipe must have been defective or had some irregularity.


How many people use cellular core ABS in combustions? Barely any from what I have seen. And its almost impossible to have a defect in a pipe, in the factory they check the pipe with really high tech stuff. And ABS is very durable, it would not crack or anything when dropped.
Cellular core is fine for a barrel but not chamber.


Your an idiot.
Cellular core ABS is more common than solid wall.
I have built 3 cell core abs cannons and have put hundreds of shots through them. Not one has had any sign of failure or weakness.

One gun fails and everyone flips out and immediately make the pipe the devil?


Solid wall is more common, I haven't been here very long and the majority of cannons were made from solid wall.

F*cking Wigger
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Unread postAuthor: Scope » Sun Apr 08, 2007 6:29 pm

fom wrote:
frankrede wrote:
fom wrote:
frankrede wrote:I refuse to accept that theory.
I have never heard or seen cell core abs fracture under normal circumstances.
His pipe must have been defective or had some irregularity.


How many people use cellular core ABS in combustions? Barely any from what I have seen. And its almost impossible to have a defect in a pipe, in the factory they check the pipe with really high tech stuff. And ABS is very durable, it would not crack or anything when dropped.
Cellular core is fine for a barrel but not chamber.


Your an idiot.
Cellular core ABS is more common than solid wall.
I have built 3 cell core abs cannons and have put hundreds of shots through them. Not one has had any sign of failure or weakness.

One gun fails and everyone flips out and immediately make the pipe the devil?


Solid wall is more common, I haven't been here very long and the majority of cannons were made from solid wall.

F*cking Wigger


You wont be here long talking like that.. just to let you know.
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Unread postAuthor: frankrede » Sun Apr 08, 2007 6:36 pm

fom wrote:
frankrede wrote:
fom wrote:
frankrede wrote:I refuse to accept that theory.
I have never heard or seen cell core abs fracture under normal circumstances.
His pipe must have been defective or had some irregularity.


How many people use cellular core ABS in combustions? Barely any from what I have seen. And its almost impossible to have a defect in a pipe, in the factory they check the pipe with really high tech stuff. And ABS is very durable, it would not crack or anything when dropped.
Cellular core is fine for a barrel but not chamber.


Your an idiot.
Cellular core ABS is more common than solid wall.
I have built 3 cell core abs cannons and have put hundreds of shots through them. Not one has had any sign of failure or weakness.

One gun fails and everyone flips out and immediately make the pipe the devil?


Solid wall is more common, I haven't been here very long and the majority of cannons were made from solid wall.

F*cking Wigger

I'm a wigger?
HAHAHAHAHAHHAHA
myspace.com/alt_f4_mylife
I wear hollister and don't sag my pants.

I ahve been on this site, and trust me, solid wall may be common in your area but it isn't in most areas. Solid wall is a regional thing.
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Unread postAuthor: Killjoy » Sun Apr 08, 2007 6:44 pm

Solid wall is more common, I haven't been here very long and the majority of cannons were made from solid wall.

Fom,
That doesn't mean solid wall is more common. All of my cannons are solid wall pvc, but it took me months to find 3" and 4" pressure rated pipe and I had to buy it in bulk (I'm still working wiht the stuff I bought a year ago). All my home depot and lowes have is cellular core when you get past 2" diameter pipe, and all the ABS is cellular core no matter what the diameter; I have yet to see any solid wall ABS.
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Unread postAuthor: fom » Sun Apr 08, 2007 7:27 pm

killjoy wrote:Fom,
That doesn't mean solid wall is more common. All of my cannons are solid wall pvc, but it took me months to find 3" and 4" pressure rated pipe and I had to buy it in bulk (I'm still working wiht the stuff I bought a year ago). All my home depot and lowes have is cellular core when you get past 2" diameter pipe, and all the ABS is cellular core no matter what the diameter; I have yet to see any solid wall ABS.


Sorry, I meant its more common in potato guns.


imawigger wrote:I'm a wigger?
HAHAHAHAHAHHAHA
myspace.com/alt_f4_mylife
I wear hollister and don't sag my pants.

I ahve been on this site, and trust me, solid wall may be common in your area but it isn't in most areas. Solid wall is a regional thing.


Being a wigger doesn't have much to do with what you wear, its how you act.[/quote]
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