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first attemp at pneumatic cannon>>>swooshhhhhh

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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first attemp at pneumatic cannon>>>swooshhhhhh

Unread postAuthor: FORE!!!! » Sat Jul 11, 2009 7:30 am

well here she is my first pnumatic cannon

im using basic pvc pressure pipe with a very loose ball vavle,i didnt have the time to look for a modded valve but all in all she works good...

ive fired it at a bunch of towles i had hanging on the cloths line at 80 psi, with a marble.. it went straignt threw five layers of towleing!!! i cant believe it........ the barrel is the perfect size for a marble ,,im now throwing my combustion cannon to the shitter and embarking on my pneumatic cannon journey.. :idea: :idea: :idea: :idea:

just an update there are photos on page 2 and 3 for the sprinkler valve setup and shortend chamber
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Attachments
11-07-09_2204.jpg
about 4 hours work on and off
11-07-09_2203.jpg
gauge setup ,shrader valve and brace to support the barrel
11-07-09_2202.jpg
......
11-07-09_2201.jpg
there she is (1250 mm long)
Last edited by FORE!!!! on Wed Jul 22, 2009 9:57 pm, edited 1 time in total.
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Unread postAuthor: frozebyte » Sat Jul 11, 2009 7:54 am

Hey, nice huge gun you have there!
Won't be able to say much, not a fan of pvc and huge guns, prefer small copper/steel ones.
Alright, the only think i can say is... I have the same bv as you! Im trying to make my mini bv handle position like a trigger and look like one, any plans of modding yours?

Cheers,
frozebyte

p.s. if you have any ideas of modding the valve you could reply to my spuddy junior unleashed topic, thanks!
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Unread postAuthor: FORE!!!! » Sat Jul 11, 2009 8:22 am

frozebyte wrote:Hey, nice huge gun you have there!
Won't be able to say much, not a fan of pvc and huge guns, prefer small copper/steel ones.
Alright, the only think i can say is... I have the same bv as you! Im trying to make my mini bv handle position like a trigger and look like one, any plans of modding yours?

Cheers,
frozebyte

p.s. if you have any ideas of modding the valve you could reply to my spuddy junior unleashed topic, thanks!


cant say im a fan of mini weapons,but anyway as for modding a ball valve i dont think there is much u can do other than trying to wear out the seal so its not as tight and applying some grease/lube, and maybe a longer handle because leverage is ur friend...
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Unread postAuthor: FORE!!!! » Sat Jul 11, 2009 8:48 am

well ive had this idea of modifying my pretend suppressor (atm) just wanted a few thought on the below diagram..

will it benifit at all or its not worth it?????
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Unread postAuthor: inonickname » Sat Jul 11, 2009 9:37 am

Nope, your chamber is too massive for any reasonably sized suppressor to have a difference. If you hacked up a rubbish bin into a suppressor it might partly silence it.

Quite a nice gun..how about a piston?
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Unread postAuthor: FORE!!!! » Sat Jul 11, 2009 9:58 am

inonickname wrote:Nope, your chamber is too massive for any reasonably sized suppressor to have a difference. If you hacked up a rubbish bin into a suppressor it might partly silence it.

Quite a nice gun..how about a piston?


im glad u answerd that before i started drilling holes in my barrel,which brings me to my next question,,and like u must off read my mind,because i was about to ask the question on what a piston cannon is??? and how does it work??? diagrams would be good....

thanx annyway
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Unread postAuthor: MRR » Sat Jul 11, 2009 10:09 am

Have a look at this:

http://www.spudfiles.com/forums/piston- ... t8157.html

and this:

[youtube]http://www.youtube.com/watch?v=apSA_ny8DgM[/youtube]
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Unread postAuthor: spudtyrrant » Sat Jul 11, 2009 10:24 am

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Unread postAuthor: FORE!!!! » Sat Jul 11, 2009 10:26 am

wow dude good details,the youtube version is crap,but the forum explanation make's me sleep easy,,cudos to the guy who made that and to you for ur time ... :D :D (mrr&spud)
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Unread postAuthor: MRR » Sat Jul 11, 2009 10:50 am

No problemo.

Nice that you think that the YouTube video is crap. :director: I made it :angryfire: .


I made it on request to one of my videos and it took me about 1 hour to make.
It's not like you hurt my feelings... :crybaby:


Now seriously I don't care about that. Your comment gave me a laugh. :laughing3:
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Unread postAuthor: FORE!!!! » Sat Jul 11, 2009 11:06 am

lol sorry dude let me refrase that the youtube version didnt explain it that well at first,,id did click on it first so u get marks for presentation,but only after i saw the forum version did it become really clear.. i missed the equalization hole,and now its clear ..
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Unread postAuthor: IlovePsi » Sat Jul 11, 2009 4:19 pm

the video is great , i like it
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Unread postAuthor: Technician1002 » Sun Jul 12, 2009 7:44 pm

Nice little marble shooter. I agree with another post the chamber is way too big and past the point of diminishing returns. If you get a chance, pick up a copy of GGDT and calculate the volume of the chamber and barrel. You will find that most likely with the combination of that barrel and chamber, over 85% of the air is still in the chamber when the marble is out of the barrel. A barrel 1/3 the size or even smaller will provide close to the same performance and use only 1/3 the air or less per shot.

Since you barrel does unscrew, you may wish to try some other barrel sizes for larger projectiles. :D
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Unread postAuthor: kjjohn » Sun Jul 12, 2009 7:48 pm

looks great, ive worked with pneumatics myself before. May I suggest you use a modded sprinkler valve in the future, pneumatic or electric firing, much quicker opening time.
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Unread postAuthor: FORE!!!! » Sun Jul 12, 2009 8:31 pm

thanx i really wanted a 1" sprinkler valve but cant seem to find any website that alows me to use paypal and send to australia and thats cheap..any ideas??? so i went with the ball valve for now,, ive just finished spraying my chamber jet black it looks good,and i ordered a scope from ebay http://cgi.ebay.com.au/ws/eBayISAPI.dll ... 0412397339

a laser sight http://cgi.ebay.com.au/Red-Laser-Sight- ... 7C294%3A50

and a 60cm rifle bipod http://cgi.ebay.com.au/HARRIS-9-13-Shoo ... 7C294%3A50

all up about 100 dollars worth more than the gun itself
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