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What i have been working on

Built a pneumatic 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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What i have been working on

Unread postAuthor: LikimysCrotchus5 » Wed Jun 18, 2008 12:07 am

Well this is what i have been doing lately.

I think its pretty good for my first time with copper.

This gun isn't currently soldered so that needs to be taken care of (which i dont think it will be too hard for me)

Features/Specs:

4',1" copper chamber
6',.75" copper barrel

Bolt Action Breech Loading (just need the "Bolt" part)
Hot-Glue piston

When more funds come i am going to make it blowgun triggered with a 1/4 inch QEV.

Pump still needs to be made.

More pics to come tomorrow and I'll change the title.
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Copper Cannon.jpg
In her semi-glory.
4SPC, My 4" piston 3" porting cannon
Memo:
Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
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LikimysCrotchus5
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Unread postAuthor: Pilgrimman » Wed Jun 18, 2008 12:15 am

Do you have any good games on that calculator? :lol:

Anyway, nice gun! Once it's soldered, you should definitely post some damage pics! :twisted:
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Unread postAuthor: starman » Wed Jun 18, 2008 12:18 am

Nice clean job! Good air quantity and relatively long barrel. It should be a good performer if you've got your piston right. Get us some pics of that setup. Also a close up of the breech loader would be nice... :wink:
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Unread postAuthor: Gippeto » Wed Jun 18, 2008 12:32 am

Looks good!

Going to have some serious punch with a six foot barrel too!

Pump will be "high" pressure (300psi+) no doubt? :)
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Unread postAuthor: LikimysCrotchus5 » Wed Jun 18, 2008 12:34 am

Gippeto wrote:Looks good!

Going to have some serious punch with a six foot barrel too!

Pump will be "high" pressure (300psi+) no doubt? :)


Yes of course, i wouldnt have made it copper then :)
I am going to make the pump based off your design, Gippeto, and ill most likely buy a check valve.

Does Home Depot sell check valves?
How much are they?
How much pressure can you use the with?
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4SPC, My 4" piston 3" porting cannon
Memo:
Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
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Unread postAuthor: jackssmirkingrevenge » Wed Jun 18, 2008 12:35 am

Gippeto wrote:Looks good!

Going to have some serious punch with a six foot barrel too!


Agreed, nice :D
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Unread postAuthor: LikimysCrotchus5 » Wed Jun 18, 2008 12:37 am

Thanks JSR.

I still need to put that foam on the chamber so that it doesnt make my hands dirty, and i need to put a spacer in between as well as hose clamps to hold it down.

Most of this should be done........after work of course :cry:
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4SPC, My 4" piston 3" porting cannon
Memo:
Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
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Unread postAuthor: n-strike » Wed Jun 18, 2008 1:51 am

Home Depot does sell check valves, but not copper ones...if there's even such thing...
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Unread postAuthor: trollhameran » Wed Jun 18, 2008 1:58 am

looking good man. Have you used hot glue for the piston before? Does it work well?
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Unread postAuthor: LikimysCrotchus5 » Wed Jun 18, 2008 7:45 am

trollhameran wrote:looking good man. Have you used hot glue for the piston before? Does it work well?


Yes it works ok, just make sure it has enough lubrication because the piston tends to have more friction with its seat.
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4SPC, My 4" piston 3" porting cannon
Memo:
Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
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Unread postAuthor: psycix » Wed Jun 18, 2008 8:04 am

That gun will dish out a serious punch to whatever is in front of it!
Good job! :D
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Unread postAuthor: koolaidman » Wed Jun 18, 2008 9:57 am

i bought check valves at HD for my pump. They were brass swing checks for water, oil, and gas. I strongly reccomend against these. Mine leak like crazy. They are made entirely of brass even the sealing face and they leak like crazy. buy either a spring one, or make sure its got a sealing face
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Unread postAuthor: LikimysCrotchus5 » Wed Jun 18, 2008 12:55 pm

Ill just check online (maybe mcmaster) for a copper check valve.

What i also need is a pressure rated length of hose. I went to home depot and they have some, but i would have to cut it. And i asked if i can use it to 300 psi with hose clamps but they said it would leak.

So you guys got any ideas of a hose i can get that wont leak at 300psi+?

I think i might just go to a paintball store and do the same think chaos did,... get a braided metal hose.
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4SPC, My 4" piston 3" porting cannon
Memo:
Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
User avatar
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Unread postAuthor: Gippeto » Wed Jun 18, 2008 1:40 pm

Decent quality compressor hose is rated to 300psi.

I use hydraulic hose rated to 5800psi. :)
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Unread postAuthor: LikimysCrotchus5 » Wed Jun 18, 2008 4:19 pm

Gippeto wrote:Decent quality compressor hose is rated to 300psi.



Thats what i was referring to here:
LikimysCrotchus5 wrote:

What i also need is a pressure rated length of hose. I went to home depot and they have some, but i would have to cut it. And i asked if i can use it to 300 psi with hose clamps but they said it would leak.


But do you think i can still use it with hose clamps without leaks?

Gippeto wrote:
I use hydraulic hose rated to 5800psi. :)


Overkill, might i say :wink:
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4SPC, My 4" piston 3" porting cannon
Memo:
Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
User avatar
LikimysCrotchus5
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