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sucsess

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: irishguy » Sat Sep 22, 2007 6:02 pm

Success my first cannon worked first time

Here is what I did ill levee things in approximate metric to save confusion I got an eye piece which is called a screw able end cap in the USA .two pipe joiners and a 15 inch length of 4 and half inch sewer pipe the orange under ground pipe it does not have a presser rating on it but would meet the 110 psi minimum legal requirement and 5ft of two inch pipe and a converter for the pipe this id say if any is my week link as this is mainly used for indoor work and probably would have a lower pressure rating any way glued it all together use pvc glue I could not get the stuff u use on the pipe before u use the glue so I just glued it all together waited 24 hours
I got a long nose electronic lighter and took it apart found the two wires in it I then got a stretch of wire I had ling about from an old kettle I drilled two tiny holes in the chamber and passed two paper clips threw it that were left 2 mm apart inside the chamber I hooked this up two the kettle wire an checked for a spark it worked well so now I have enough cable that I can fire it around a corner for safety

So sprayed 3 second amount of hair spray in the chamber clicked the igniter and boooom was not expecting it to be as loud

So now im thinking of my first modification as I reassembled the lighter I have a lent tube that gas comes out of and what im going to try is feed the tube threw a small hole in the chamber up the gass flow so I will have it pore into the chamber at a predictable rate

Before some one saes it I don’t have the right barrel two camber ratio but exactly how long should my chamber be next time usin 5ft of 2 inch pipe

Sory for the spelling guess they din teach me like they shulda
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Unread postAuthor: silverdooty » Sat Sep 22, 2007 6:46 pm

Hope this helps

Success my first cannon worked first time.

Here is what I did I'll leave things in approximate metric to save confusion.
I got an eye piece which is called a screwable end cap in the USA. Two pipe couplings and a 15 in. length of 4 1/2 in. sewer pipe. The orange underground pipe does not have a pressure rating on it, but would meet the 110 psi minimum legal requirement and 5ft of 2 in. pipe and a reducer for the pipe. This I'd say, if any, is my weak link as this is mainly used for indoor work and probably would have a lower pressure rating. Any way, glued it all together using pvc glue. I could not get the stuff you use on the pipe before you use the glue so I just glued it all together and waited 24 hours.
I got a long nose electronic lighter and took it apart found the two wires in it. I then got a stretch of wire I had lying about from an old kettle. I drilled two tiny holes in the chamber and passed two paper clips through it. They were left 2 mm apart inside the chamber I hooked this up to the kettle wire and checked for a spark. It worked well so now I have enough cable that I can fire it around a corner for safety.

So sprayed 3 seconds amount of hair spray in the chamber clicked the igniter and boooom. I was not expecting it to be as loud.

So now I'm thinking of my first modification as I reassembled the lighter I have a lent tube that gas comes out of and what I'm going to try is feed the tube through a small hole in the chamber. Up the gas flow so I will have it pour into the chamber at a predictable rate.

Before someone says it I don’t have the right barrel to chamber ratio, exactly how long should my chamber be next time using 5ft of 2 inch pipe?

Sorry for the spelling, I guess they didn't teach me like they should of.
:wink:
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Unread postAuthor: Novacastrian » Sat Sep 22, 2007 7:00 pm

Very nice gesture Siverdooty :D

Irishguy, any chance of damage pics, maybe?
Well done on your success :P
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Unread postAuthor: irishguy » Sat Sep 22, 2007 8:49 pm

ill be taking it out tomarow for a test run but i have to find somwere to shoot it and get some one to video tape me hopfully not the cops
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