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Marble rifle

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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Marble rifle

Unread postAuthor: McThrust » Thu May 04, 2006 1:40 am

this is my newly created marble gun. it has an airtight breech loader (kinda ghettoish though). i made this one after my last pneumatic exploded, plumming store told me that dwv was pressure rated to 130psi, pfft my ass it was! blew up cutting my ankle pretty good! this time i got class 12 (sch40) and class 18 pipe (sch 80). Very accurate and great fun!

Also i keep hearing of people being able to get more than 1 shot out of one pressurization. how is this possible?
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Breech loaded 1/2" barrel
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compact copper barrels
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Unread postAuthor: rna_duelers » Thu May 04, 2006 5:38 am

Nice,and good damage to the gum tree cuz they are hard!And actualy our class 18 pipe doesnt have a higher pressure rating as sch 80 :x Whats the range on that thing and wouldnt it have been cheaper to buy a section of 50mm calss 12 pipe and fitting to have more chamber space and less bends for more power and also it would be alot cheaper then all those parts..just a sujestion..helpful critasicm(spelling??)Whats your farthest shot?i want 2 compare :P
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Unread postAuthor: McThrust » Thu May 04, 2006 6:21 pm

i chose that type of design primarily caus i wanted it to look cool, have a nifty shoulder rest and a fairly small chamber so i didnt have pump much. since marbles are 13mm and the barrel is 15mm i put a bit of tape round my marble to get a good seal, this then of course makes them very innaccurate and shortens there distance by alot but doubles the power over a short distance. though when i just place the marble with no tape it goes a good 250 metres
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Last edited by McThrust on Thu May 04, 2006 6:35 pm, edited 1 time in total.

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Re: Marble rifle

Unread postAuthor: saladtossser » Thu May 04, 2006 6:31 pm

McThrust wrote:Also i keep hearing of people being able to get more than 1 shot out of one pressurization. how is this possible?


well my barrel sealing gun can let out 2 or 3 shots in one 90 psi charge, but my gun's barrel is tiny so it doesnt use much air, plus my trigger is very sensitive.
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Unread postAuthor: SpudStuff » Thu May 04, 2006 9:32 pm

nice but do you mean SDR 18 pipe?
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Unread postAuthor: bboymatty » Fri May 05, 2006 3:41 am

no. In australia we rate pipe in classes

for pressure rated pipes it is 9, 12 and 18.
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Unread postAuthor: Benny » Fri May 05, 2006 6:16 pm

and its pissing me off i dont know whats what when i go to knd :x
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Unread postAuthor: rna_duelers » Fri May 05, 2006 8:11 pm

And the numbers symbolise there safe pressure rating class 9= 9bar running pressure 12=12bar and 18=18bar although with some of the smaller pipes they have a higher pressure rating but they still fall inot the class 18 section.
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