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Built this yesterday, look!

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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Built this yesterday, look!

Unread postAuthor: gattlinggun » Fri Apr 06, 2007 3:30 am

this is my first one i ever built in my life it pretty big it reaches up to my waist its very loud its put together by that concrete glue for pipes its on the tip of my toung but i cant say it
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Re: built this yesterday pics of it looky!!!!!!!

Unread postAuthor: Flying_Salt » Fri Apr 06, 2007 4:07 am

gattlinggun wrote:its on the tip of my toung but i cant say it


PVC Cement perhaps? Looks like my first, except yours is ABS.
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Unread postAuthor: mega_swordman » Fri Apr 06, 2007 7:04 am

Looks nice, but PLEASE, Use periods and complete sentences. It will make your posts easier to read and much more enjoyable.
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Unread postAuthor: lukemc » Fri Apr 06, 2007 8:52 am

how tall are you? just asking so i can get an estimate of how big iit is. for your fuel i assume that you are using deoderant. i just found this topic it might give you a upgrade http://www.spudfiles.com/forums/viewtopic.php?p=73656&#73656
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Unread postAuthor: frankrede » Fri Apr 06, 2007 1:35 pm

PVC glue+ABS pipe=it works fine.
I have pressure tested it to 90 psi, and their was no blow out.
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Unread postAuthor: hi » Fri Apr 06, 2007 1:46 pm

i actually think that pvc glue works better on abs then abs glue works on abs.
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Unread postAuthor: schmanman » Fri Apr 06, 2007 2:06 pm

hi wrote:i actually think that pvc glue works better on abs then abs glue works on abs.



"i" dont think so.

it is made specifically for abs, it is obviously better for abs!
do some research, buddy!

gatlinggun, there's a thing called a period, it goes between sentences and makes things legible. :wink:

and why did you post two topics on the same gun? :?
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Unread postAuthor: hi » Fri Apr 06, 2007 2:33 pm

schmanman wrote:
hi wrote:i actually think that pvc glue works better on abs then abs glue works on abs.



"i" dont think so.

it is made specifically for abs, it is obviously better for abs!
do some research, buddy!"

i do think so, i have had abs glue fail twice, then i read that pvc glue works on abs and i have never had it fail. I know that there are at least two types of abs glue, i guess the one i use doesnt work that well.
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Unread postAuthor: frankrede » Fri Apr 06, 2007 2:47 pm

I used abs glue is not meant for any form of pressure, it is only ment to seal and hold the pipe together.

PVC glue is meant to hold pipe together under pressure. It might even work on non-pvc pipe.
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Unread postAuthor: SpudBlaster15 » Fri Apr 06, 2007 3:21 pm

hi wrote:i do think so, i have had abs glue fail twice, then i read that pvc glue works on abs and i have never had it fail. I know that there are at least two types of abs glue, i guess the one i use doesnt work that well.


ABS cement and PVC cement are similar, both having a (Ketone) solvent base. However, the glue also contains polymers that are designed to intertwine with the polymers that dissolve from the pipe, then re-harden, forming a very strong bond. By using PVC glue on ABS pipe, you are effectively forming a joint that is comprised of both types of plastic, and will be weak and prone to failure.

A proper ABS solvent weld will hold more pressure than the pipe itself, I have tested this (Oxy/MAPP ignition inside a closed ABS chamber).
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Unread postAuthor: fom » Fri Apr 06, 2007 4:25 pm

frankrede wrote:I used abs glue is not meant for any form of pressure, it is only ment to seal and hold the pipe together.

PVC glue is meant to hold pipe together under pressure. It might even work on non-pvc pipe.


Theres a Chemical Reaction between ABS cement and ABS pipe and PVC cement and PVC pipe when they are "joining". That chemical reaction wont happen effectively or it just won't happen at all.
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Unread postAuthor: gattlinggun » Sun Apr 08, 2007 12:33 am

wtf abs works fine it has no defects with me there are many diffeerent colors of abs whats the difference
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Unread postAuthor: Killjoy » Sun Apr 08, 2007 12:56 am

PVC cement somewhat dissolves the pipe and basically fuses the two peices together together (the cement has all sorts of "wonderful" solvents which partly dissolve the pvc pipe, as well as abs and most platics) . ABS glue basically holds the two pieces together and seals them, there is really no "physical" bonding between the two pieces.
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Last edited by Killjoy on Sun Apr 08, 2007 1:00 pm, edited 1 time in total.

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Unread postAuthor: paddo » Sun Apr 08, 2007 1:31 am

abs glue SEALS the gap between the two parent materials.

pvc cement primer is a solvent which liquifys the polymers that make up the parent material (the two pipes).

the cement itself contains polymers which help unify the two pipes. this type of 'weld' is very strong because it basically makes two pieces of pipe become one.

have a read of this ..

http://www.burntlatke.com/weld.html
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Unread postAuthor: SpudBlaster15 » Sun Apr 08, 2007 1:02 pm

The combined IQ of the 2 posters above me is bordering that of my dog.

As I previously stated, ABS glue contains a ketone solvent, as well as ABS polymers. It does essentially the same thing to ABS as PVC cement does to PVC, though more effectively. The ABS polymer dissolves more readily in the solvent than does the PVC polymer, eliminating the need for primer entirely.
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