I'm honestly not too worried
Ill just stick to propane

Thats crazy!

ive had my first cannon for a long ass time and never had problems with it..

yeah it sure is threaded on..
i had to get a 4-2" ABS reducer, then a 2-1.5" reducer and bought a male threaded end
it works perfectly
i blew apart some logs tonight.

I wanted to add
what if i were to switch ...

Hahaha thanks guys
I'll NEVER stop being lazy.. its too much effort


and whats the deal with DWV ABS?
i think it is
its the same stuff i made my last cannon out of...

Hey everyone
this is my second combustion cannon, and it worked out great

This is what i started with about a month ago, it took a while cause im pretty busy... and im real lazy..
http://images.nexopia.com/galleryfull/1738/1738806/41.jpg

The initial mockup of everything
http://images.nexopia ...

Nah
we're just always pretty stoned
and hes just... i cant explain him

and thanks!
ill get all the beginning to end photos together and do that

So my potato cannon is COMPLETE!
I fixed all the issues and it is working great!
here are some pictures of the test fires me and a buddy were doing
it was late so i didnt really do much other than test it.

http://images.nexopia.com/gallery/1738/1738806/48.jpg

http://images.nexopia.com/gallery ...

Dont use aerosols that arnt going to burn clean
my suggestion would be to move to something that is a clean hydrocarbon
so you just get CO2 and H20 vapor, not grimy shit to get stuck on your electrodes.
When i made my first combustion, i used a can of butane (like the kind you use for a refillable ...

Well i did more today
its almost done :D

here are some updated pictures.
i didn't really have trouble getting the steel pipe fixed into the barrel
http://images.nexopia.com/gallery/1738/1738806/44.jpg

Although i am a little worried about the barrel size.. it is quite heave and might need ...

Well i bought all my initial ABS stuff and have it fitting together
I have a couple more questions..
I have a 4" -> 3" converter and then a 3" -> 1.5" and then ill be screwing on a PVC valve very much like the one in the design.
now im wondering if i can use some small screws and screw instead of ...

I was wondering what the differences between using one or the other.. i havent really looked into barrel interchangability

If you can find a high tech bbq sparker... ive found they work really well putting out about 10 sparks per second

Thanks for the info

What is the easiest way to put on handles

and what is the difference for me using a shorter barrel with bigger diameter..
like instead of a 7' x 1.5" diameter being replaced with a 6' x 2" diameter

Are there quick turn and release joints in ABS in order to have a fast breach ...

I've build a combustion before, just your regular BBQ igniter and spraying Butane or releasing propane into the chamber and capping it.

Now im looking to building a Propane injection, based on plans from this page http://www.spudfiles.com/forums/complete-plans-for-advanced-combustion-t4512.html ...