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Auto Loader 32mm

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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Auto Loader 32mm

Unread postAuthor: velocity3x » Fri Apr 02, 2010 4:35 pm

I posted pics in the Pneumatic Forum a couple of months ago while I was preparing to make a video. The cannon incurred a mechanical problem soon after posting the pics so, I removed them. I've spent the past month making design changes throughout and testing. These pics are of the final (almost) design.

SPECIFICATIONS:
Barrel = 1.251id x 1.75od x 72"
Ammunition = 1.250 Ball Bearing
Semi-auto
Operating Pressure = 1,000psi
Pressure system = Continuous fill.
Chamber / Barrel = 1:1
Trigger Mechanism = Pneumatic actuated ball valve, 0.630 id
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Last edited by velocity3x on Fri Apr 16, 2010 10:42 pm, edited 2 times in total.
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Unread postAuthor: Gun Freak » Fri Apr 02, 2010 4:39 pm

Wow..... VIDEO PLEASE!!! NICE gun. :D
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Unread postAuthor: Demon » Fri Apr 02, 2010 4:51 pm

... INSANE ...

I love all that shiny clean solid full metal construction ...

You CAN'T skip making a video !
(I wondered why it suddendly disapered ... )
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Last edited by Demon on Fri Apr 02, 2010 4:51 pm, edited 1 time in total.
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Unread postAuthor: MrCrowley » Fri Apr 02, 2010 4:51 pm

Holy crap that is nice. Your last version was good enough but you really out-did your self on this one. Yeah...we're gonna need a video too :P
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Unread postAuthor: Demon » Fri Apr 02, 2010 4:54 pm

Maybe a principe schematic ?
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Unread postAuthor: velocity3x » Fri Apr 02, 2010 5:00 pm

Demon wrote:(I wondered why it suddendly disapered ... )


Because of the minor malfunction I went into self-imposed exile! I used that time to redesign the things that I found offensive.
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Unread postAuthor: randompkguy » Fri Apr 02, 2010 6:12 pm

any pics of the inner workings of that schweet arse reg you built?
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Unread postAuthor: POLAND_SPUD » Fri Apr 02, 2010 6:29 pm

why is it limited to 60rpm? due to flow requirements or because of its loading mechanism?
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Unread postAuthor: velocity3x » Fri Apr 02, 2010 7:00 pm

POLAND_SPUD wrote:why is it limited to 60rpm? due to flow requirements or because of its loading mechanism?


The rof is governed by several of things. As I recall, a 1.250 bearing weighs about 2045 grains. That's a lot of mass to move around quickly.
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Last edited by velocity3x on Fri Apr 09, 2010 6:04 pm, edited 1 time in total.
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Unread postAuthor: thedeathofall » Fri Apr 02, 2010 7:18 pm

Each operation has to run reliably and not crowd the next......it's all a matter of time. 60 rounds equates to about 17.5 lbs of steel down range in 1 minute. How much faster do you think it should run?


Valid point... I must ask for some velocity specs of this. Also, how do you fill the chamber? I assume, you have a scuba or HPA pump at the shop in order to reach 1000 psi per shot.
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Unread postAuthor: velocity3x » Fri Apr 02, 2010 7:39 pm

thedeathofall wrote: Also, how do you fill the chamber? I assume, you have a scuba or HPA pump at the shop in order to reach 1000 psi per shot.


No velocity specs at this time but, coming soon.
I have several size "K" cylinders of nitrogen. When the cylinders are full they contain 2500 psi (200 ft^3+). I don't have a way to refill them with hpa. When the pressure drops to low, I exchange them for full cylinder. Needless to say....rapid fire can quickly empty a type "K" cylinder.
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Unread postAuthor: deathbyDWV » Fri Apr 02, 2010 8:20 pm

That is really cool and clean. Very nice build.
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Unread postAuthor: POLAND_SPUD » Fri Apr 02, 2010 8:49 pm

but as I understand the loading mechanism and the main valve operate independently, right ? so while the loading mech loads ammo the gun can be filled at the same time... so the question is 'what takes more time ? filling or loading the next round

it's all a matter of time. 60 rounds equates to about 17.5 lbs of steel down range in 1 minute. How much faster do you think it should run
I realize that increasing the ROF is not exactly the most practical thing you one can do with a gun like this... though I would still like to know what is the most limiting factor here


what is this http://www.spudfiles.com/forums/files/p ... 13_966.jpg ?
uhmm it looks like an air cylinder but it seems it's attached to some sort of a lever... is it an air operated ball valve ?[/quote]
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Unread postAuthor: MrCrowley » Fri Apr 02, 2010 9:02 pm

POLAND_SPUD wrote:what is this http://www.spudfiles.com/forums/files/p ... 13_966.jpg ?
uhmm it looks like an air cylinder but it seems it's attached to some sort of a lever... is it an air operated ball valve ?

Trigger Mechanism = Pneumatic actuated ball valve

Looks like it :wink:
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Unread postAuthor: Crna Legija » Fri Apr 02, 2010 9:05 pm

wow :shock: that's a true beauty

lol is your rear sight a pc fan cover, looks like the old school war plane guns would have.

BRING ON THE DAMAGE PICS
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