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BFV-OMG

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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BFV-OMG

Unread postAuthor: Carlman » Mon Mar 30, 2009 2:03 am

Gday ladies,

I have finished my new gun to the stage of posting it but it is far from complete. below are some specs and pics of the launcher.

Chamber - Double layered 3" chamber consisting of a 3" female slip to male threads adapter, 3" coupler and a 3" endcap.
Barrel - Multiple; 0.75", 1", 1.5", 2", 2.5".
Valve - Modded 3" Hunter commercial sprinkler valve rated to 220psi.
Pilot - 1/2" BV
Fill methods - propane and air.

Performance data will be available (damage pics and vids etc) as soon as i have time to go shoot the thing past 30psi (omg 30psi in this thing is like 60 in my 1.5" porter!).

Comments and critisisms (sp?) welcome and appriciated.

PS: i know the fill/pilot aint pretty and will be replaced will fewer specialty brass pieces.
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Unread postAuthor: jook13 » Mon Mar 30, 2009 2:06 am

That valve is so beastly! I can only imagine what it can do with a golfball at 100 psi. Or better yet, a frozen can of dogfood with a bigger chamber and 3 inch barrel.
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Unread postAuthor: inonickname » Mon Mar 30, 2009 2:10 am

Very cool..such a monstrosity. Chamber is a little small but oh well :wink: it is sweet
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Unread postAuthor: Carlman » Mon Mar 30, 2009 2:30 am

inonickname wrote:Very cool..such a monstrosity. Chamber is a little small but oh well :wink: it is sweet


i built this gun for portability, i will make another chamber for it when i want to really give it shite
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Unread postAuthor: psycix » Mon Mar 30, 2009 6:42 am

Why use such a beastly valve on a portable cannon?
This valve deserves an huge cannon.
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Unread postAuthor: jackssmirkingrevenge » Mon Mar 30, 2009 6:51 am

psycix wrote:This valve deserves an huge cannon.


Agreed, seems a bit of a shame.
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Unread postAuthor: Carlman » Mon Mar 30, 2009 8:33 am

Think of it this way, I would technically get the same power out of a GB in half the barrel length than if I used a 1"

And as I said it will be made into a bigger gun with a bigger chamber when the space arises, at the moment it will stay as this except the chamber matierial. I will proberly make it twice the size and out of poly so the gun can be used at its full 220psi.
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Unread postAuthor: jonnyboy » Mon Mar 30, 2009 2:28 pm

jackssmirkingrevenge wrote:
psycix wrote:This valve deserves an huge cannon.


Agreed, seems a bit of a shame.

Same here maybe something bigger than the SWAT gun and with higher pressure.

To daydream a little imagine 2 dual chambers 4 inch diameter 10 feet long with a rating large enough for 220 psi. Assorted barrels featuring a 30 feet long gb barrel. /drool

How much pressure can you get with propane anyways?
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Unread postAuthor: Carlman » Mon Mar 30, 2009 11:25 pm

Ok ive had it now, noone is to mention the use of a small chamber anymore, i put my efoort into this gun to get it perfect for what it was designed for and all im getting back in responses is its crap because it has a small chamber.

FOR THE LAST freakin TIME, A BIGGER CHAMBER WILL BE ADDED, INFACT A WHOLE NEW freakin GUN WILL BE MADE WHEN I HAVE THE SPACE TO SHOOT THE [woman part]. FOR THE MOMENT I NEED A SMALL CHAMBER BECAUSE IM RUNNING A SMALL BARREL FOR PORTABILITY NOT POWER.

not one comment so far did not mention something about the chamber size.

jonnyboy: at 35C its at around 200psi so i have to watch what im doing with the needle valve. I normaly charge it with 100.
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Unread postAuthor: mark.f » Mon Mar 30, 2009 11:48 pm

Bit of a small ch- :happy8:

Good job. It actually really doesn't matter all too much as to the size of the chamber. The actual driving factors for performance, I believe, will be barrel size, pressure, and valve performance.

Speaking of which, have you taken apart the valve to look at how fully the diaphragm opens, the diameter of the porting, etc.?
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Unread postAuthor: jackssmirkingrevenge » Mon Mar 30, 2009 11:55 pm

Carlman wrote:all I'm getting back in responses is its crap because it has a small chamber.


No one's saying that, we're just saying big chambers on 3" sprinkler valve launchers are AWESUM!!11!!1 :D

How about some damage pics to shut everyone up ;)
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Unread postAuthor: Carlman » Tue Mar 31, 2009 12:10 am

Mark: yes i have taken it apart i will post pics in 10 or so ill edit ths post

jack: mate your only response was "agreed seems a bit of a shame" its not exactly supportive at all is it?
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Unread postAuthor: Davidvaini » Tue Mar 31, 2009 12:33 am

not very supportive but I do agree that it actually slightly angered me when I seen that nice of a valve that is soooo hard to come by in my area and many areas was used with such a small chamber and barrel.

To me its like giving a $1000 drawing utensil that was used by some famous artist to a 4 year old kid that cant color in the lines. It could be used by someone with soo much more skill.. now just replace the drawing utensil with the valve and the 4 year old kid with a short chamber size/barrel and thats what it felt like to me. I don't mean to sound like a dick but that was my honest to god feelings when I seen the post.

I however then read that you have a 2.5" barrel and it was made for portability which helps a little bit. I also read that you are going to be using it in a bigger cannon as well and I can't wait to see that (I like your cannons.)

I would like to see a nice 3 foot chamber with a nice size barrel and a better pilot system.

Also may I recommend that you paint it as well.

Goodluck on the design and possible future implementation of barrels/pilot/chamber sizes.

This is my constructive criticism.
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Unread postAuthor: Carlman » Tue Mar 31, 2009 12:45 am

ok guys it was either let it sit there for another 6 months or use the godm thing in the meantime until i can make an teh epic cannon, its posts like im getting now that remind me of why i lost interest in spudding, when you build a gun you build it to your needs to have fun with.

for example, david, you build alot of bbmgs right? well i dont see the point in shooting that many bbs at once, id rather make a single shot or a semi auto and use skill to take out my opponent.

mark heres the pics, i have now taken out the spring as i realised i would not need it, i think the sealing face moves about 1" up off the lip.
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Unread postAuthor: jackssmirkingrevenge » Tue Mar 31, 2009 12:46 am

Carlman wrote:mate your only response was "agreed seems a bit of a shame" its not exactly supportive at all is it?


Fair enough, but pretty is as pretty does so let's see it in action ;)
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