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the SVBC. EDIT: now with damage pics!!

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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so what do you think?

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the SVBC. EDIT: now with damage pics!!

Unread postAuthor: thespeedycicada » Mon Sep 03, 2007 9:13 pm

this is the svbc (sprinkler valve bolt cannon) its a 1 inch orbit valve modded the barrel is 1 inch sch 40 and the chamber is 1.5 inch sdr 21 leftover from my last gun the chamber is connected to the valve with a reducer tee its very powerful damage pics comin soon! plz comment.EDIT:just put the sch 40 on it damage pics will have to wait until tommorow though because my camera needs new batteries.
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Attachments
P1010114.JPG
the valve
P1010114.JPG (26.69 KiB) Viewed 714 times
P1010116.JPG
the camber and reducer tee.
P1010116.JPG (24.9 KiB) Viewed 714 times
P1010118.JPG
the schrader
P1010118.JPG (25.72 KiB) Viewed 714 times
P1010125.JPG
tuna can.
P1010125.JPG (31.35 KiB) Viewed 548 times
P1010131.JPG
double soda can.
P1010131.JPG (30.4 KiB) Viewed 548 times
P1010132.JPG
all of the destruction and the bolt that was used.
P1010132.JPG (36.33 KiB) Viewed 548 times
Last edited by thespeedycicada on Wed Sep 05, 2007 8:30 pm, edited 2 times in total.
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Unread postAuthor: trae08 » Mon Sep 03, 2007 9:18 pm

why did you put you blower valve on you sprinkler upside down? other then that nice gun
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Unread postAuthor: Redcoat » Mon Sep 03, 2007 9:19 pm

Is it Bolt action?

YOu did say bolt cannon or does it shoot "bolts".

Nice gun.
I find it interesting that your solenoid valve can block off the pressure.The sprinkler valve i bought's solenoid valve can't hold squat (in air pressure).

Anyway, like to see damage pics!
happy SPuddin'
8)
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Last edited by Redcoat on Mon Sep 03, 2007 9:20 pm, edited 1 time in total.
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Unread postAuthor: phonut » Mon Sep 03, 2007 9:19 pm

Nice gun. Where did you find the 1" Sprinkler valve?
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Unread postAuthor: thespeedycicada » Mon Sep 03, 2007 9:23 pm

redcoat.it shoots bolts but i will soon make it bolt action.Phonut.i got the valve at home depot.
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Unread postAuthor: noname » Mon Sep 03, 2007 9:31 pm

It's an extrmeley bad idea to use SDR pipe as a pressure chamber; have fun diggin' out shrapnel. :P
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Unread postAuthor: thespeedycicada » Mon Sep 03, 2007 9:36 pm

noname wrote:It's an extrmeley bad idea to use SDR pipe as a pressure chamber; have fun diggin' out shrapnel. :P
yeah i know but its all i had and i dont take it over 85 psi (i usually do about 75) so i think it should be fine if im not rough with it.Its rated to 160 psi and im not going to take it to 100.
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Unread postAuthor: trae08 » Mon Sep 03, 2007 9:40 pm

trae08 wrote:why did you put you blower valve on you sprinkler upside down?

?
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Unread postAuthor: thespeedycicada » Mon Sep 03, 2007 9:43 pm

trae08 wrote:
trae08 wrote:why did you put you blower valve on you sprinkler upside down?

?
Sorry you mean the blow gun right? if you do its because i didnt have the right fittings to do it the other way.
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Unread postAuthor: noname » Mon Sep 03, 2007 9:50 pm

The pressure rating of the pipe won't matter. It's rated to 160 psi; big deal. IF, that's IF, I ever made a launcher from SDR pipe it would be a very low power combustion. IF it was a pneumatic, I would scrap it immediately. IF it was a case of life or death, then I wouldn't use it oover 20 psi.
Usually dropping a pressurized cannon can cause an elbow to crack or something. If you drop that hunk o' junk, the whole chamber is going to frag out on you. Then you get your very own article in the newspaper, just like the recent Ryan Meerdink.
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Unread postAuthor: thespeedycicada » Mon Sep 03, 2007 9:54 pm

noname wrote:The pressure rating of the pipe won't matter. It's rated to 160 psi; big deal. IF, that's IF, I ever made a launcher from SDR pipe it would be a very low power combustion. IF it was a pneumatic, I would scrap it immediately. IF it was a case of life or death, then I wouldn't use it oover 20 psi.
Usually dropping a pressurized cannon can cause an elbow to crack or something. If you drop that hunk o' junk, the whole chamber is going to frag out on you. Then you get your very own article in the newspaper, just like the recent Ryan Meerdink.
Okay ill put a new chamber on it tommorow the reducer tee is threaded so ill unscrew it and put a new chamber on it.
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Unread postAuthor: Fnord » Mon Sep 03, 2007 10:31 pm

Luckily for you, the light-weight thinwall shrapnel won't do as much damage as normal sch40 :)

It should be fine.. I would wear hearing/eye protection and a decent pair of gloves though.
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Unread postAuthor: SpudBlaster15 » Tue Sep 04, 2007 1:31 am

1.5" SDR 21 pipe is rated to 200psi right? If that is the case, I have no idea what noname is going on about. As long as you don't drop the cannon or take it over it's pressure rating, the chamber should be fine.
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Unread postAuthor: MrCrowley » Tue Sep 04, 2007 2:37 am

SpudBlaster15 wrote:1.5" SDR 21 pipe is rated to 200psi right? If that is the case, I have no idea what noname is going on about. As long as you don't drop the cannon or take it over it's pressure rating, the chamber should be fine.


I still would leave a safety margin on it though, I wouldn't take 260psi rated pipe up to 200psi. Like i've said many times i've had pipe rated to 260psi fail at 110psi, though I think it was due to rapid decompression and compression of the chamber.
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Unread postAuthor: Redcoat » Tue Sep 04, 2007 2:58 am

I reccomend doing what your doing by just keeping it at 75 psi.
My first pneumatic was made using unrated pvc and i took it up to 90 psi.
The endcaps bent outwards :? but i had no leaks or shrapnel parties.
Just be careful.
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