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Stuff's New Gun

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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Big Enough for ya?

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Total votes : 6
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Unread postAuthor: SpudStuff » Fri Dec 15, 2006 6:19 pm

It may or may not get a larger chamber. The problem is that even at only 35 PSI with no projectile the entire cannon slides back about a foot.
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Unread postAuthor: pyrogeek » Fri Dec 15, 2006 6:22 pm

It would be more powerful if you had a 1.5 inch tee between the chamber and sprinkler valve since it would exhaust faster. Then, you could just use a bushing or two to reduce the third hole of the tee down to 1/4. It shouldn't cost too much, and you would probably notice a big difference.
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Unread postAuthor: squeaks » Fri Dec 15, 2006 6:23 pm

That's some kick. Sorry to restate my earlier question, but could you give me some price info on the valve discluding the exhaust and fill valves but including any parts you had lying around your house?
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Unread postAuthor: SpudStuff » Fri Dec 15, 2006 8:43 pm

That is a 1/2" Tee.

PVC Fittings
4" Tee - 12.99
4" FNPT Adapter - 4.99
4" SCH 80 Plug- 9.99
3" FNPT adapter - 3.99

Pipe
1' of 3" pipe - 1.89
1' of 3.5" pipe - 2.50
1' of 4" pipe - 2.89

Brass fittings
1/2"x3" nipple SCH 80 - 5.99
1/2" Tee - 1.50
1/2"x1/4" Bushing - 0.99
2x Male QC - 1.50
Female QC - 1.99

Valves
2x 1/4" Brass Valve -12
1.5" WeatherMaster 200PSI Valve - 199.99

Other crap
Ashcroft 0-100 PSIG Gauge- 249.99

So, if you want to build the EXACT same valve as I did You will have a $513.19 hole in your wallet.
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Unread postAuthor: squeaks » Fri Dec 15, 2006 8:49 pm

why in the crud would you even think of buying a $250 pressure gauge?
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Unread postAuthor: ProfessorAmadeus » Fri Dec 15, 2006 8:54 pm

I think he gets his tuff at flee markets and gets it real cheap.
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Unread postAuthor: noname » Fri Dec 15, 2006 8:57 pm

$250 is cheap, Professor? I have a feeling you read $2.50.
Yeah SpudStuff, why did you dump that much cash on a pressure guage?
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Unread postAuthor: ProfessorAmadeus » Fri Dec 15, 2006 9:01 pm

Well If he did pay that much he's RETARDED!! I think he means if you payed full price for it, it would be that much. He probably got all his stuff really cheap like on his hybrid.
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Insomniac wrote:Hey why am I a goose???? Why not somthing a little more awe inspireing, like an eagle or something? LOL

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Unread postAuthor: noname » Fri Dec 15, 2006 9:36 pm

Do they really make 3.5" pipe? Kind of weird size.
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Unread postAuthor: squeaks » Fri Dec 15, 2006 9:40 pm

Good point. I didn't even think about that. What wuld you use the 3.5" pipe for anyway if they indeed make it.
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Unread postAuthor: SpudStuff » Fri Dec 15, 2006 10:20 pm

Yes I got the valve for 2 dollars New at the flea market. Look it up for yourself, the gauge really is 250 dollars.

They do make 3.5" pipe. I got ~4 feet of it for free from the construction at my school. That was SCH 80 conduit. Then while browsing the junk store looking for a specific laser, i found 5 feet of SCH 40 stuff. It works as a 3" coupler and piston/sleeve for 4 inch SCH 40 pipe.
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Unread postAuthor: MisterSteve124 » Mon Dec 18, 2006 6:20 pm

I ordered a ashcroft 1-160 pressure gauge from mcmaster for 9 bucks why the hell would it be 250?

AND why was the weathermaster valve 200 bucks? I'm assuming thats the sprinkler valve.

But still nice cannon it looks real nice.
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Unread postAuthor: experament_u2 » Mon Dec 18, 2006 6:47 pm

i love how big it is
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Unread postAuthor: ProfessorAmadeus » Mon Dec 18, 2006 6:50 pm

Sprinkler valves over 1 inch get really expensive. I dont know why but they do.
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Unread postAuthor: MisterSteve124 » Mon Dec 18, 2006 6:57 pm

yes but not 200 bucks homedepot sells them for 50.
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