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Marble Assault rifle (WITH 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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GOOD or BAD

GOOD
31
89%
BAD
4
11%
 
Total votes : 35
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Unread postAuthor: killagorrila99 » Tue Dec 19, 2006 7:42 pm

Didn't work to well... It just fired them all like a shell.
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Unread postAuthor: Mr.michael.2468 » Sun Jan 23, 2011 9:42 am

hey this design is great! but i gotta jump in on this discussion to ask a question about your design, i didn't see a work psi that your using it at, cuz 30psi seems low to be able to shoot it that long, and for the loading system, is it just as simple as the marbles just fall down into the barrel and get launched, making room for the next one? and also wondering why you used steel on this project, could've stuck with pvc for alot less, i know the big guys like steel but i cant even get a pressure high enough to make it worth while, oh well, whatever floats your boat, basically i was questioning the gravity feeder, i guess it could be that simple lol idk, and nice job on the sprinkler valve i almost screwed mine up, took alot of epoxy to fix it :lol: still works, because i have a system like that so maybe i'll make a barrel for it like this.
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Unread postAuthor: jackssmirkingrevenge » Sun Jan 23, 2011 9:57 am

Mr.michael.2468 wrote:30psi seems low to be able to shoot it that long


At the rate of fire it has, perfectly feasible, and it doesn't take much to put a marble through a cardboard box.

Mr.michael.2468 wrote:and for the loading system, is it just as simple as the marbles just fall down into the barrel and get launched, making room for the next one?


Pretty much.

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Unread postAuthor: Mr.michael.2468 » Sun Jan 23, 2011 10:50 am

hmm cool, but with a sprinkler valve, or my 1in one the blast of air doesn't last 3 sec, and i have a much larger air tank then his little tiny one made of steel, no offense, would i just need a smaller valve to regulate the air going through the valve? i think he said his was 3/4, but it doesn't seem like such a small tank could be pushing air out for that long, specially not at 30 psi, thats really my question, i guess a video would clear it up, just making sure before i go spend 10$ on new ammo and material for a new barrel,
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Unread postAuthor: jackssmirkingrevenge » Sun Jan 23, 2011 11:06 am

it doesn't seem like such a small tank could be pushing air out for that long


Keep in mind that each round in the barrel acts as a flow obstruction.

3 seconds sounds a little optimistic for such a small chamber at low pressure, I'll agree with you there, but these designs dump their magazines fairly quickly unless the air is pulsed (like I did with a pop-off valve here) so I can see it clearing a 17 round magazine, even at 30 psi.

As to a video, this launcher was posted over 4 years ago and the maker hasn't contributed to the forum in over 3 years, so it's unlikely ;)
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Unread postAuthor: Mr.michael.2468 » Sun Jan 23, 2011 12:56 pm

haha oh alright well if you get what i mean, i guess i'll have to try thins out then lol
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