should be around $20-$30 but it depends if you get a cheap pvc ball valve for $4 or a sprinkler valve for $15 and how big you want it. mine cost me about $20 with everything. check the pics in my www thing in my post. its the new smaller one, not the big one, i didnt use pressure rated fittings on t...

heres a video that i made click here im going to make another video in the spring that show me actualy cooking it. then i will post it here. heres my tip-use plastic bottle caps to measure your powders, (2 parts sugar, 3 parts kno3) i cook mine in a tuna fish can and mix it with a popsicle stick con...

what size pipe did you use?

what do you shoot with it? i have a 3/4'' barrel and i cant find anything to shoot out of it. soon ill get a 1/2 and bore it for marbles and use this design

thanks for the replies yea thats why i had to make a small one. lowes had nothing over 1 1/2'' in nsf-pw fittings. actualy i got an e-mail back from a guy at lasco and he said i shouldn't use it for compressed air but tests have shown that the fittings, will sustain the pressures in table 1 even tho...

im making a new cannon, a smaller one and i bought the fittings i need. i knew that they have to be nsf-pw so thats what i got. they are also sch-40 but on the lasco (brand) website it says not to use for compressed air. they dont have a pressure rating on them like my pipes do. these are ok to use ...

I havent been on here for a while due to my cannon being broke. I dont know if this is on the site but i got some pics of it and some movies. (its not mine some brilliant man made it) heres the video i slapped together click here and heres the pics shot of cannon 1 shot of cannon 2 shot of both cann...

Try the old caustic soda and aluminium foil trick,creates alot of hydrogen gas and that can be used to make a pneumatic fire supersonic rounds.But it also creates alot of heat and also dry ice but that makes the chamber cold and thus brittle but maybe it could be used in a metal holding tank. ^ ^^^...

AHHHHHH F! I made a pneumatic cannon and used a 90 NSF-DWV. I didnt know it wasnt pressure rated. My 3'' pvc said NSF-DWV and it said 260 psi. I had it up to 60psi and it didnt explode. I was going to get it up to about 110psi when i get a new pump. Will i be ok? Oh yea not to mention i had it up to...

I buy fire works from another state and i have got to say they stink. I mean I have fun with them and stuff but some of them are bad. Not like the ones my dad had. I got theses ash can somethings and all they do is blow the caps off. So I took one apart and all it was was this little fire cracker ab...

Oh yeah you guys every see this idiot?
http://www.break.com/index/dryice3.html

i never used one of these co2 things so i dont know how they work. it would be nice if you could just pull the trigger and some co2 comes out. that way you could shoot it 4 or 5 times before it runs out.

what kind of air pump do you use? i have just been pumping it with a bad tire pump. it only goes up to 55 psi. i have a compressor but its broken and will be fixed in the summer. i may get a foot pump or maybe a electric one but all of them only hook up to 12v. car adaptors. i want one thats some wh...

i found a golf ball in my yard and i tried it in my cannon. its 1 1/2 inch pvc but the ball wont fit. its too big. is there a better brand or size of golf balls that you use? mine has titleist 1 DT So/ Lo on it. i might buy some on ebay or somthing if i find some cheap.

i dont know about the potassium nitrate one because its not like others where the smoke comes out 1 hole. it burns the hole area that is touching air. so if you like it it might only smoke on the 1 side with the wick until its in the air. also the first one they need air to burn the wick so it might...

i was thinking of buying one of these tire inflators and just screwing on a schrader valve with no valve so its just open and the other end in pvc. it would shoot marbles but it might use the hole tank to shoot 1 marble. realy easy to make and simple. http://i12.photobucket.com/albums/a244/mojavedud...