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break barrel breach loading?

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break barrel breach loading?

Unread postAuthor: Brian the brain » Tue Mar 21, 2006 3:51 pm

I've tried this type of breech in a gun (that can't be discussed because of forum rules)
without any rubber seal it was airtight!!! just metal to metal.I think it's because the way the barrel rotates..it can apply a lot of force onto the seal.
When done correctly it will "jam" shut, not needing anything to keep it closed.
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breakbarrel open.JPG
here the breach is opened.accepts very long projectiles this way
breakbarrel closed1.JPG
The breach is closed.Notice the pivotpoint is below the barrel.
breakbarrel closed1.JPG (12.18 KiB) Viewed 1451 times
Gun Freak wrote:
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: rna_duelers » Thu Mar 23, 2006 2:20 am

ohhk,well that idea is taxed!looks simple and i think i might give it a try.thanks mate.
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Unread postAuthor: crazykid » Wed May 23, 2007 7:24 pm

Hey can i have some instructions plz. i like the idea but dont know how to build it. wouldnt it be better to have a seal
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Unread postAuthor: GinsuGuy585 » Wed May 23, 2007 10:39 pm

You could have a repair coupling behind the break with a spring behind it. The hinge that the barrel is attached to could also have a spring to open it when the repair coupling is pulled back.


One sec and I'll make a diagram...
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Unread postAuthor: goathunter » Wed May 23, 2007 10:43 pm

Crazykid, take a look at mine, it's similiar to Brian's but with a few twists to make it work on a pneumatic. http://www.spudfiles.com/forums/goats-gun-t7859.html
Any questions just ask me.
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Unread postAuthor: GinsuGuy585 » Wed May 23, 2007 11:01 pm

Here are the mods I propose:
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Attachments
breakbarrel_closed1_184.jpg
Closed, the green repair coupling is pushed foreward over the barrel by the orange spring. The orange spring at the hinge is in tension and will cause the barrel to spring up when the black bolt is pulled back (moving the repair coupling back)
breakbarrel_closed1_184.jpg (12.73 KiB) Viewed 1171 times
breakbarrel_open_117.jpg
The green repair coupling is foreward, but when the barrel is pushed down the angle of approach will cause the coupling to be pushed back untill the barrel is fully closed, at which point it will move forward and lock onto the barrel under the spring's pressure
breakbarrel_open_117.jpg (38.82 KiB) Viewed 1171 times

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Unread postAuthor: Bubba05 » Thu May 24, 2007 5:51 pm

I experamented with something like this and couldnt get the darn thing to seal properly! but now you got you diagrams up i might go and dig it up and have another go!

Bubba
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Unread postAuthor: crazykid » Fri May 25, 2007 5:44 pm

ginsuguy is that design airtight because of the coupler. if it is Than i make it . Do you know good ammo fo 2in barrel i need that 2
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Unread postAuthor: iknowmy3tables » Fri May 25, 2007 6:50 pm

wait do you need a coupling, do you use a coupling brian yet you say its airtight
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Unread postAuthor: goathunter » Fri May 25, 2007 9:41 pm

A screw type coupler isn't needed to make it air tight but it does simplify the building and alignment.The type in the diagram will work but won't be as air tight as a screw on.
Crazykid,Nerf footballs are always fun for a 2" barrel.Or the old fashioned Spud :)
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