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HP burst fire BBMG - added videos

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: Novacastrian » Wed Oct 24, 2007 6:19 am

ALIHISGREAT wrote:
Keep up the carnage. Eventually you're gonna invent something big and then the government might contract you to build small backup weapons that pack a big punch to pilots or some such.


is there anyreason why the governement wouldn't just give the pilots a pistol or a PDW like the H&K MP7A1 or the B&T MP9?

http://world.guns.ru/smg/smg49-e.htm MP7A1
http://www.mp9.ch/ MP9


Everyone knows that top gun pilots started out as spugunners :lol:
What would they know about real guns? :lol:
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Unread postAuthor: ALIHISGREAT » Wed Oct 24, 2007 6:25 am

yeah instead of the gau 8 on the a-10 thay should mount the taternator II
http://www.spudfiles.com/forums/12-12-06-big-update-the-taternator-ii-aluminum-spud-gun-t4960.html

or the GB semi http://www.spudfiles.com/forums/gb-semi-t7899.html

its would scare the crap out of the enemy :lol:
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Unread postAuthor: jackssmirkingrevenge » Wed Oct 24, 2007 6:40 am

ALIHISGREAT wrote:is there anyreason why the governement wouldn't just give the pilots a pistol or a PDW like the H&K MP7A1 or the B&T MP9?


It depends - if a pilot is surrounded by enemy forces, then even a M60 isn't go to keep him protected. Pilot's personal weapons are usually more to enable to him to survive by hunting wildlife until he is rescued than to defend himself from enemy forces. When Gary Powers was shot down over Soviet territory in his U-2, he was carrying a silenced Hi-Standard 0.22LR pistol.

Pilots will more than likely find a survival rifle more useful if caught in the wild. An airgun makes an interesting choice as with a pump and a supply of lead, it will potentially be more useful than a powder burning rifle. An example of the usefulness of air rifles in this situation is the air rifle carried by Lewis and Clark on their celebrated US expedition.

BTW, I've got a scuba tank lying around in the shed. They'd be great for an application like this... if you had a regulator.


Technically, it has a regulator - as in, it's a 300 bar tank, but I fill my rifle to 210-230 bar, depending on how much I turn the valve. I'd just need to find a way to hook it up to a schrader.
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Unread postAuthor: ALIHISGREAT » Wed Oct 24, 2007 7:26 am

i would take a steyr scout tactical and a nice pistol like the beretta 92fs with me.
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Unread postAuthor: paaiyan » Wed Oct 24, 2007 8:33 am

ALIHISGREAT wrote:i would take a steyr scout tactical and a nice pistol like the beretta 92fs with me.


Meh, the steyr is cool, but I'd get a D. Eagle .50.
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Unread postAuthor: ALIHISGREAT » Wed Oct 24, 2007 9:25 am

mmm desert eagle .50, an awesome gun and an added bonus is that its shiney :D
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Unread postAuthor: jackssmirkingrevenge » Wed Oct 24, 2007 12:02 pm

paaiyan wrote:Meh, the steyr is cool, but I'd get a D. Eagle .50.


Not really useful in a survival situation though is it - massive recoil, heavy rounds, noisy, hard to fire accurately - you'd be much better off with a scoped suppressed 0.22 rifle. Then again, having a desert eagle for backup in case you run into a bear isn't a bad idea either ;)
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Unread postAuthor: jackssmirkingrevenge » Sat Oct 27, 2007 10:14 am

added some can munching videos :)
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Unread postAuthor: jackssmirkingrevenge » Thu Jan 28, 2010 1:43 pm

Another resurrection for the camera, here's a 5 round burst from this project fired at a soup tin, filmed at 420 fps:

[youtube]http://www.youtube.com/watch?v=uGWsifDILWo[/youtube]
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Unread postAuthor: McCoytheGreater » Thu Jan 28, 2010 2:48 pm

Neat vid. i expect something referring to high speed in every one of your posts from now on out, JSR. Did you just pull the trigger for the five round burst?
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Unread postAuthor: jackssmirkingrevenge » Thu Jan 28, 2010 3:11 pm

McCoytheGreater wrote:Neat vid. I expect something referring to high speed in every one of your posts from now on out


I realise I might be slightly overdoing it with the high speed posts but it's just the enthusiasm of having a new toy, it will wear off soon :) I think :roll: but seriously, aside from awesome target videos, I see this as being a very valuable tool when it comes to research and development, particularly with operations which the human eye can't quite keep up with. For example if you look at the "real time" video for a 5 round burst from this thing it looks like a single "buckshot" blast but in the high speed you can clearly see the sequential impacts.

Did you just pull the trigger for the five round burst?


This particular launcher is a cross between a piston cannon and a BBMG, the valve only opens once and stays open, but it dumps air into a BB chamber in the same way that a BBMG does meaning the BBs are fired individually.
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Unread postAuthor: Brian the brain » Thu Jan 28, 2010 3:51 pm

Pilots will more than likely find a survival rifle more useful if caught in the wild. An airgun makes an interesting choice as with a pump and a supply of lead, it will potentially be more useful than a powder burning rifle. An example of the usefulness of air rifles in this situation is the air rifle carried by Lewis and Clark on their celebrated US expedition.


In a survival situation you don't want to waste energy on pumping..
It's great in any other though.. :wink:

Lewis and Clark had better conditions than say Gary Powers..


And what's with the bbmg ferries? :D

Jack...the O-ring shot limiter thingy would be really cool...if you would combine it with...a repeating valve and a reservoir to back it up..

True burst fire....firing multiple separate bursts...
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Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Unread postAuthor: jackssmirkingrevenge » Thu Jan 28, 2010 6:19 pm

Brian the brain wrote:And what's with the bbmg ferries? :D


I've just come back home from one beer too many, that went completely over my head :oops: :roll:

True burst fire....firing multiple separate bursts...


Interesting thought, are you suggesting high performancr modded-for-semi QEV style valve with a cloud BBMG "magazine"?
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Unread postAuthor: kozak6 » Fri Jan 29, 2010 12:36 am

Since reloading is so much work and it's limited to bursts anyways, is the bb chamber really necessary?

If the valve discharged air directly into the barrel with bb's loaded in it, would there be any significant change in efficiency?
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Unread postAuthor: jackssmirkingrevenge » Fri Jan 29, 2010 1:08 am

kozak6 wrote:If the valve discharged air directly into the barrel with bb's loaded in it, would there be any significant change in efficiency?


Very much, imagine 5 BBs loaded in the barrel. The air is pushing on the surface area of one BB, but the weight it is pushing out is that of 5 BBs, so the velocity will be much lower. With a chamber however, one BB is pushed out at a time, allowing each BB to reach a much higher muzzle velocity.
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