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Cannon ideas needed

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Unread postAuthor: jackssmirkingrevenge » Wed Sep 14, 2011 3:15 pm

jsefcik wrote:10 ft of 3 inch? That's huge!!!!

Way to big dude


hehe That's what sh... no, NO. It's TOO EASY!

...

Jessie, I raise my hat to you, whether by accident or design you are the most unbelievably talented troll I've ever seen on this forum :?
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Unread postAuthor: POLAND_SPUD » Wed Sep 14, 2011 3:41 pm

possibly a 2 or 3 inch pvc chamber with a 5 foot sdr golf ball barrel

ideas please!!!
Try something like this
Image
but use pressure rated parts

http://www.dailytribune.com/content/articles/2011/06/30/news/doc4e0c675fa4e21087124138.jpg

OMG this is getting scary - there are lots of pics of goats and PVC pipe WTF ?!?

youtube.com/watch?v=Ry3bvXt5clA
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Last edited by POLAND_SPUD on Wed Sep 14, 2011 3:52 pm, edited 2 times in total.
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Unread postAuthor: DYI » Wed Sep 14, 2011 3:44 pm

Okay, well I have another idea for you. You'll need a 3L pop bottle (make sure you have the cap), aluminum foil, epoxy, a PVC female threaded adapter and male threaded adapter, some PVC pipe, and either muriatic acid, Drano, or lye (if you use lye you'll have to mix it with water).

Epoxy the female threaded adapter onto the lid end of the bottle very securely (it needs to be large enough that you can put the cap on the bottle after the adapter is on there). Glue the barrel onto the male adapter. Unscrew the top and put a few square feet of aluminum foil and about two cups of Drano, lye, or muriatic acid in. Put the cap back on quickly (and tight), and load the projectile into the barrel, then screw the barrel onto the adapter. The cap acts as a burst disk valve when it pops off (and is reusable because the threads just expand a little bit and slip off). The gas is hydrogen, which works really well and can send a golfball at least 900 yards from a small launcher like this.

Alternatively, you could put a ball valve on the PVC piece and leave the cap off after filling. That won't be nearly as powerful, but more controllable. You'll want to wait until the bottle inflates to at least twice its normal size to open the valve for maximum pressure.
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Unread postAuthor: mattyzip77 » Wed Sep 14, 2011 4:07 pm

oh no not chemicals, he will blow himself up for sure!!!!
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Go Bruins!!!!
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Re: Cannon ideas needed

Unread postAuthor: MrCrowley » Wed Sep 14, 2011 4:08 pm

MrCrowley wrote:That's my other cannon , this valve and other parts I got all for free!!! Why not build another one!!!

Ah I see now. You had me confused in your original post with your excellent grammar and syntax.

Buy a 6' length PVC that fits a tennis ball and buy a 3' length of 3" or 4" pipe for the chamber. That's about as creative as one can get with a 1.5" porting piston valved pneumatic.

If you're wondering what performance is like... GGDT.

mattyzip77 wrote:@ Mr. Crowley His basement must be huge to get 600 yards, seeings how he cannot fire it anywhere else!!

Now I'm not sure if he's lying or just jsefcik :?
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Unread postAuthor: Gippeto » Wed Sep 14, 2011 4:18 pm

mattyzip77 wrote:oh no not chemicals, he will blow himself up for sure!!!!


It's called "natural selection". Haven't you asked yourself..."How can he be that stupid and survive? :roll:

I know I have.:banghead:
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Unread postAuthor: POLAND_SPUD » Wed Sep 14, 2011 4:29 pm

How come when I search for 'jsefcik' and select pictures...
...google says it has found over 1400 results - all of them are pics from SF?

hmm... that's strange
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Unread postAuthor: mattyzip77 » Wed Sep 14, 2011 4:39 pm

POLAND_SPUD wrote:How come when I search for 'jsefcik' and select pictures...
...google says it has found over 1400 results - all of them are pics from SF?

hmm... that's strange


Now that is mother clucking funny!!!! :laughing8: :laughing8:
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Unread postAuthor: saefroch » Wed Sep 14, 2011 5:00 pm

POLAND_SPUD wrote:How come when I search for 'jsefcik' and select pictures...
...google says it has found over 1400 results - all of them are pics from SF?

hmm... that's strange
Lol do the same with my username.

In response to DYI's suggestion: I don't think that setup is predictable enough. Inserting two electrodes into the chamber and connecting them to a pulsed HV setup should create a sudden pressure increase and trigger the valve. Just be sure to put plenty of epoxy around the electrodes. More is more!
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Unread postAuthor: Gun Freak » Wed Sep 14, 2011 5:38 pm

Ah I see now. You had me confused in your original post with your excellent grammar and syntax.

:D
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Unread postAuthor: LeMaudit » Wed Sep 14, 2011 5:40 pm

but want a sick design
any ideas
mini specs


May I suggest... build a rifle you can play music with.
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Unread postAuthor: Fnord » Wed Sep 14, 2011 5:57 pm

^That would be even more awesome if you did it with some type of breech-loading blunderbuss.
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Unread postAuthor: jsefcik » Wed Sep 14, 2011 6:10 pm

I already built the cannon about 20 mintues ago,

waiting for glue to dry!!!
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Unread postAuthor: mattyzip77 » Wed Sep 14, 2011 7:10 pm

I simply cannot wait to see the awesomeness!! :roll: :roll: :roll:
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Unread postAuthor: jsefcik » Wed Sep 14, 2011 10:07 pm

Matty it's looking good dude!!!!! Seals right up and just gotta wait for the glue to dry!!! Then fire it!!!
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