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Ultimate Aussie Plinker

Built a BB Machine Gun? 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: chaos » Sat Jun 02, 2007 9:11 am

uberlad wrote:Seeing as your chamber is so small, there is ample space for another. Have you considered putting a second chamber behind it with another valve? :idea: That way you could get two shots per charge.


or u could do what i did and get a small propane bottle hook a hose to it and put it in a pack pack. that way you wouldn't have to even put the gun down to charge it.
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Unread postAuthor: uberlad » Sat Jun 02, 2007 9:18 am

chaos wrote:
or u could do what i did and get a small propane bottle hook a hose to it and put it in a pack pack. that way you wouldn't have to even put the gun down to charge it.


True, but I think that method (which works great with some cannons) might take away from this one, because it seems to me as though it was designed to be very light, portable and quick to use.
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Unread postAuthor: chaos » Sat Jun 02, 2007 9:23 am

uberlad wrote:
chaos wrote:
or u could do what i did and get a small propane bottle hook a hose to it and put it in a pack pack. that way you wouldn't have to even put the gun down to charge it.


True, but I think that method (which works great with some cannons) might take away from this one, because it seems to me as though it was designed to be very light, portable and quick to use.


a small gas bottle ain't that heavy and having it connected full time to the gun would make it quicker to reload and therefore quicker to get more shots off.

and im pretty sure the gun was designed around paint ball or something similar so it would need a quick reload time
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Unread postAuthor: integral » Sat Jun 02, 2007 9:29 am

For the hard work and the looks.... it wouldnt be all that great. You would need to have valve for each chamber so only one is used at a time, making it bulky and cumbersome. All that effort for only one extra shot... If anything make the chamber bigger so you get a big bang, but then again, its a "sniper" isnt it.

Got any other ideas on making the dual chamber? My eyes are dead, so thats the only one I could think of :?
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Unread postAuthor: uberlad » Sat Jun 02, 2007 9:30 am

chaos wrote:
a small gas bottle ain't that heavy and having it connected full time to the gun would make it quicker to reload and therefore quicker to get more shots off.

and im pretty sure the gun was designed around paint ball or something similar so it would need a quick reload time


But that applies only if you want to carry a gas bottle on your back, so it really depends on who is using it. I personally wouldn't want to, but I'm sure that a lot of people wouldn't mind.

Although both methods could be applied, and you can get two shots per reload via the gas cylinder.

integral wrote:
For the hard work and the looks.... it wouldnt be all that great. You would need to have valve for each chamber so only one is used at a time, making it bulky and cumbersome. All that effort for only one extra shot... If anything make the chamber bigger so you get a big bang, but then again, its a "sniper" isnt it.

Got any other ideas on making the dual chamber? My eyes are dead, so thats the only one I could think of


With the size of the chamber and valve on this cannon? It would not make much of a difference in size, and a spare charge could save a lot of time in a paintball match.
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Unread postAuthor: to_live » Sun Jul 08, 2007 2:15 am

would you be able to make an inlive piston and use it for this? because this has inspired me to build a new gun for plinking... but i dont have enough money for a sprinkler valve :( ...
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Unread postAuthor: chaos » Sun Jul 08, 2007 2:28 am

to_live wrote:would you be able to make an inlive piston and use it for this? because this has inspired me to build a new gun for plinking... but i dont have enough money for a sprinkler valve :( ...



ithink you ment inline?, im not sure if inline piston valves have ever been made..ever.


co-axle on the other hand, could surly be used, even with a small chamber on a coaxile would be fine
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Unread postAuthor: FreakyShotGlass » Sun Jul 08, 2007 2:49 am

A coaxial would work perfectly in this design. I was going to make one but at the time I didn't have enough experience. I actually just finished my first Co-ax today.
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Unread postAuthor: f.c » Mon Jul 16, 2007 4:13 pm

perfects im jealous. but those chips in the chamber are safe arent they ?
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Unread postAuthor: FreakyShotGlass » Tue Jul 17, 2007 1:51 am

The chamber is sleeved for looks and those chips are only on the outer piece of pipe.
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Unread postAuthor: Jolly Roger » Tue Jul 17, 2007 9:59 am

Nice gun bud, did you get the idea from the new tipman? They have a new propane powered paintball gun. Or maybe they got it from you.. :P The good thing about it is that you could incorporate special effect as you shoot. Place some sort of ignitor at the end and you would be laughing mate. It may return back into the chamber, but it would easily retain the pressure. Good work, and it looks impressive too.
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Unread postAuthor: FreakyShotGlass » Wed Jul 18, 2007 1:30 am

The new Tippman is actually a combustion. I've shot this and my other bigger guns at a flame with propane and the fireball for the big guns was big this one wasn't really good.
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Unread postAuthor: jon_89 » Sun Jul 22, 2007 2:27 am

i got two questions. first how many shots do get from one tank of propane? second how do you know you have enough propane in the chamber if you have no gauge? thanks
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Unread postAuthor: spud yeti » Sun Jul 22, 2007 2:31 am

i got two questions. first how many shots do get from one tank of propane? second how do you know you have enough propane in the chamber if you have no gauge? thanks

Firstly, it depends on the size tank you have of course :wink:
Secondly, you dont know, thats why you have a guage, but people have made ghetto metering devices (syringes etc) which is not advisable.
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Unread postAuthor: FreakyShotGlass » Sun Jul 22, 2007 2:38 am

The propane will only flow until it reaches around 120psi, depending on ambient temperature. So I just open the valve on the tank until the hissing sound stops. The expansion rate of liquid propane is 270:1 so at 15 degrees celcius so according to my (dodgy) maths I should be able to get around 2700L of gaseous propane or 85 909 fills of the tank on this gun. That sounds reaaalllly huge so if I did something wrong (likely) please correct me.

EDIT: Those figures are based on a 5kg tank of propane.
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