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Mammoth

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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Mammoth

Unread postAuthor: Mini Khan » Wed Jan 18, 2006 11:24 pm

I will soon be posting a mammoth cannon. this cannon will be so massive that for the air chamber it will use over 16 feet of sch40 2.5 inch pipe. However the piston valve will be very small at 1.5 inches, also the barral will be 7 feet of 1.5 inches. I will shoot striped golf balls from up to 150 psi. i have caculate that at that pressure it will probably hurl it 3 miles. Look around for the post to be up in a month or to and if u have any douts or sugustions or jut want to mock me then plz reply.
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Unread postAuthor: Urban Ninja » Thu Jan 19, 2006 1:51 am

Don you live in the countryside? I hope your garden is big cos that thing is gonna need a lot of storage space at 23 feet :shock: ! I guess your gonna build a stand for it! Good luck :D .
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Unread postAuthor: CS » Thu Jan 19, 2006 2:11 am

How about you post this topic once you construct the cannon?
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Unread postAuthor: boilingleadbath » Thu Jan 19, 2006 6:25 pm

"3 miles"
Ok, let me geuss: you did the old "ok, so we have a force caused by the air of 150*1.5^2*.75 lbs, and a barrel that long... so plugging it into that handy formula we learnt in physics... that much muzzle velocity... and handy physics formula again... that much distance.

Sorry, but that doesn't work very well (ignores external air resistance, viscosity of air, flow choking...) . Try downloading the GGDT (gas gun desing tool).
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Unread postAuthor: Mini Khan » Thu Jan 19, 2006 9:08 pm

um ur probably right but iam pretty sure it will go miles i have some very areo dynamic ammo planed, and it wont be 23 feet long it will be compacted into about ten feet, but hey whatever

[20:33 PM]
and where can i download this ggdt

NOTE FROM PIMPMANN22: Congrats on the double post! Take Salad Tossers advice.
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Unread postAuthor: saladtossser » Thu Jan 19, 2006 10:47 pm

http://www1.iwvisp.com/thehalls/ggdt/

note: Image
click on it next time
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Unread postAuthor: taterjim » Fri Jan 20, 2006 9:56 pm

So far I have gotten tennis balls,some filled with water for extra weight ,to go over a tree 900. away and in to a pasture with keep out signs ,so I haven't retrieved all of them ,but I think some of them may have made a quarter mile ,this is with a comustion cannon. I'm sure golf balls will go substantially further than tennis balls,but I wouldn't bet on 3 miles,if you get 1 mile I want to build one just like it.
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Unread postAuthor: darkpyro » Mon Jan 23, 2006 7:30 pm

big big cannon yay post pics when your done also damage pics and your going to need a large compressor to fill that baby
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Unread postAuthor: Daemonseed » Fri Dec 22, 2006 7:01 pm

whats this 11 months later and no cannon? whats this i smell? oh yes, i think its BS
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Unread postAuthor: Triggahappy » Fri Dec 22, 2006 7:54 pm

I agree, I could have built a cannon twice as big as the one you stated in 11 months. Some one bit off more than they could chew. Don't post until you have actually made the cannon, thats what the showcase is for.
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Unread postAuthor: drac » Fri Dec 22, 2006 8:02 pm

Well thanks for being a total idiot and kicking up a topic that's been dead for almost a year.

Don't do it again.
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Unread postAuthor: Daemonseed » Fri Dec 22, 2006 8:11 pm

why so hostile?
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Unread postAuthor: Bluetooth » Fri Dec 22, 2006 8:18 pm

Because anyone that saw this thread already kinda noticed that and you probably just came across it and decided to make fun of them. Oh and and Triggahappy I'd like to see the plans for this 46' cannon you can build.
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Unread postAuthor: Triggahappy » Sat Dec 23, 2006 1:38 am

Ha ha :lol: Yeh that was a figure of speach, my front yards not even that big.
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