new gun. new a little advice

Show us your pneumatic spud gun! Discuss pneumatic (compressed gas) powered potato guns and related accessories. Valve types, actuation, pipe, materials, fittings, compressors, safety, gas choices, and more.
carter
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Sat Dec 22, 2007 6:21 am

hey dudes im building a new gun. thanks to Bunnings building a new store where i live i can finally get my hands on a sprinkler valve. but i wanted something different. a gun where i can get 2 shots without pumping up again so i will be putting 2 cambers on it that will be regulated using ball valves. just wondering if anyone has done this before and how well it worked.
i want it to be like a rifle shooting marbles. bout 125 psi.
does anyone no the weight of 1/2inch marbles. ive searched but gotten lost in the 30 or so pages
At my lemonade stand I used to give the first glass away free and charge five dollars for the second glass. The refill contained the antidote
cerberus
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Sat Dec 22, 2007 6:31 am

I know 16mm (0.62") marbles are approx 5g each if that helps.
carter
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Sat Dec 22, 2007 6:33 am

cheers man. i'll be looking at something like 600fps with a 3ft barrel which will be cool
At my lemonade stand I used to give the first glass away free and charge five dollars for the second glass. The refill contained the antidote
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MrCrowley
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Sat Dec 22, 2007 3:07 pm

Yes people have done it before, waste of time, space, money and a comfortable design in my opinion.
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Ragnarok
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Sat Dec 22, 2007 3:13 pm

carter wrote:does anyone no the weight of 1/2inch marbles. ive searched but gotten lost in the 30 or so pages
Easy. Density of glass * volume of marble... about 2.5 to 3 grams.

Double chambers is nothing new, nor is it that useful. I'd still use a single chamber any day.
Does that thing kinda look like a big cat to you?
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homedepotpro
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Sat Dec 22, 2007 3:44 pm

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carter
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Sat Dec 22, 2007 5:06 pm

i'm thinking something hand held so i can understand when you say its bulky. but i was thinking bout having one camber under the barrel and the other in th stock
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Novacastrian
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Sat Dec 22, 2007 5:14 pm

MrCrowley wrote:Yes people have done it before, waste of time, space, money and a comfortable design in my opinion.
Hehehehehehe, way to go MrC!

http://www.spudfiles.com/forums/download,id,2768.html , Now that would be uncomfortable to hold :lol:

You could just arrange the chambers end to end, i don't see how it would change the overall shape of the cannon.
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carter
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Sat Dec 22, 2007 5:19 pm

do you mean have an inline barrel with a valve in the middle? and to mc i'm looking for something out of the norm. and its bout time i made a cannon thats not ghetto. money really isn't a problem
At my lemonade stand I used to give the first glass away free and charge five dollars for the second glass. The refill contained the antidote
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MrCrowley
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Sat Dec 22, 2007 5:49 pm

carter wrote:and its bout time i made a cannon thats not ghetto.
Well who said a one chambered gun is ghetto?

It's really not worth it, if you use a sprinkler valve as long as it's hooked up to a continous supply of air like CO2 or an air compressor it can be semi-auto.

It's just really pointless unless there is a reason to have two chambers.

Just build something like <A HREF="http://www.spudfiles.com/forums/viewtop ... 0">This</a> if you're shooting marbles
carter
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Sat Dec 22, 2007 6:19 pm

all my other guns have been a little dodgey. this gun i'm going to bondo the stock etc... make it look sweet. but a lot of people have done the same sort of thing i just want it different. thats why i'm thinking dual chambers. also with the compressor i want portability so thats out of the question but i may use the co2.
At my lemonade stand I used to give the first glass away free and charge five dollars for the second glass. The refill contained the antidote
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Ragnarok
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Sat Dec 22, 2007 6:50 pm

carter wrote:and its bout time i made a cannon thats not ghetto.
I quite agree with MrC - since when has a single chambered launcher been a ghetto design? (Unless JSR is making it :P - jk)
If you take an experienced member, they are unlikely to make a double chamber cannon.

Regulated CO<sub>2</sub> is indeed a nice option, but it will depend on chamber size. A large chamber at high pressures will use up CO2 quite quickly, so be a bit sparing on how much you use.
Does that thing kinda look like a big cat to you?
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