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My First Pneumatic (Help Me) (With Pictures)

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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Unread postAuthor: hotrocks » Sat May 12, 2007 8:30 pm

hahah don't even think of making me change my mind
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Unread postAuthor: stupidandcontagious » Sun May 13, 2007 8:58 am

Yea, but we decided that this would probably be more successful. Besides, this will be a hell of a lot more fun to do!
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Unread postAuthor: jrrdw » Sun May 13, 2007 2:20 pm

Somewhere in the video link thread theres a link posted to a video that would probly change your mind. it's of a girl sitting in a gaint sling shot, and a couple of guys on a fourwheeler pull her back and...well...they let her go, no she doesn't go flying across the yard, but i would climb in and go for the ride!
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When life gives you lemons...throw them back they suck!
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Unread postAuthor: Flying_Salt » Sun May 13, 2007 2:35 pm

Shooting hockey pucks? Why couldn't you just get some Canadian guy to hit it for you?
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Unread postAuthor: super spuder » Sun May 13, 2007 2:37 pm

im Canadian :D
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trying to decide on a new project, probably something small.
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Unread postAuthor: jrrdw » Sun May 13, 2007 2:57 pm

Remember he rejects your reality, and substitutes his own!
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Unread postAuthor: frankrede » Sun May 13, 2007 4:42 pm

jrrdw wrote:Somewhere in the video link thread theres a link posted to a video that would probly change your mind. it's of a girl sitting in a gaint sling shot, and a couple of guys on a fourwheeler pull her back and...well...they let her go, no she doesn't go flying across the yard, but i would climb in and go for the ride!
HAHA I SAW THAT!
It looks so awesome
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Unread postAuthor: Pete Zaria » Sun May 13, 2007 4:44 pm

Here's the youtube video you're talking about

Human Slingshot - http://www.youtube.com/watch?v=u2-od4n5Xl0

Peace,
Pete Zaria.
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Unread postAuthor: hotrocks » Sun May 13, 2007 8:57 pm

lets not go completley off topic...this monday-wednesday ill be posting pics to see if im doing it right
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Unread postAuthor: hotrocks » Wed May 16, 2007 6:27 am

is it okay if i have two air valves on both ends of the chamber...so i can pump twice as fast?
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Unread postAuthor: stupidandcontagious » Thu May 17, 2007 3:28 pm

Hey everyone, we put almost everything together today and its looking pretty nice. Pictures are soon to come. The barrel is at 45 degrees, but since it six feet we're going to add wood supports. Hopefully we'll do this tomorrow. Hopefully we'll start testing next week, and decide on the modifications for the puck... Which we're still taking suggestions on, just keep in mind any modifications have to work in a three inch barrel, and can't involve subtracting anything from the puck. By the way, would it be a good idea to put the puck really close to the end of the barrel to minimize friction?
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Unread postAuthor: pyromaniac » Thu May 17, 2007 3:30 pm

hotrocks wrote:is it okay if i have two air valves on both ends of the chamber...so i can pump twice as fast?


yes that will help alot.

SAC yes you sac now, keeping at the top of the barrel will make it shoot less far if you want less friction lube the puck. drill A 1/2 inch hole in the pucks center and epoxy 6 inches of a 1/2 dowel in there.
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Unread postAuthor: hotrocks » Thu May 17, 2007 4:20 pm

were gonna put a paper cup in bottom facing out and then the puck on top so the cup will catch the air and work as a wad.........and were gonna lube the whole barrel up..

If we glued the T and the end piece valves today, is it okay if we test tomorrow...(probably like 15 hours from now)?


PICTURES!

Image
Image
Image
Image
Image
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Unread postAuthor: pyromaniac » Thu May 17, 2007 4:29 pm

tht fitts a hockey puck? also id buy 2 new elbows and make the chambers a little closer together.
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Unread postAuthor: hotrocks » Thu May 17, 2007 4:33 pm

why?

i probably wont, just because we dont have too much time and its not extremely important
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