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Air Gun Home Forum Index » Antique, Collector and Novelty Airguns » Help me restore a 30 + year old break barrel. Need info
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Help me restore a 30 + year old break barrel. Need info 
PostPosted: Fri Jan 13, 2012 6:19 pm Reply with quote
onearmdragon
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I have recovered an old break barrel pellet rifle.

"Raven Model 29 Hungary is on the top of the spring chamber.

It seems to be missing a firing pin for the hammer to fire into the pellet.

I have access to a machinist and mill/lathe/etc if someone can help me figure out what I need to build to get this
vintage back into working order.

Here's a few pictures I took posted on imgur


http://imgur.com/a/GZ4gd#7
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PostPosted: Fri Jan 13, 2012 8:23 pm Reply with quote
radar
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There's no pin hitting the pellet. The spring drives that heavy piston (with the rubbery or leather seal on it) forward in the cylinder and that compresses the air in front of it. That air blasts through a little hole in the barrel side of the cylinder (called a transfer port) and drives the pellet out the barrel at a speed much higher than the spring could achieve.
Air does the actual work.

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PostPosted: Fri Jan 13, 2012 9:34 pm Reply with quote
onearmdragon
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Ha! I got it in pieces, shows what I know!
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PostPosted: Sat Jan 14, 2012 10:35 am Reply with quote
radar
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onearmdragon wrote:
Ha! I got it in pieces, shows what I know!


Laughing That's the easy part...

Here's an animation of the operation:

http://www.arld1.com/images/swfs/rifledynamicssmaller.swf

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PostPosted: Sun Jan 15, 2012 11:06 am Reply with quote
Slavia
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I can't make out from the pictures - did the end plug unscrew from the rear of the compression tube, or was it held with a pin? If it was held with a pin you should consider making a spring compressor. That will make it safer and easier to hold the end plug in place while you locate the pin.

There is no piston seal visible in the photos - was it missing, or is it off with the other small parts? In any event, from the damage to the button that secures it I would guess it needs to be replaced. You will probably wind up measuring the I.D. of the compression tube to find a seal that fits. At 30+ years it could be either leather or synthetic. Leather seals can be made (for that matter, so can synthetic). Here is a place for synthetic seals:
http://www.airrifleheadquarters.com/page/page/251485.htm

Once you figure out the seal your machinist friend will have to fashion either a dovetail button or a screw to hold it on.

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PostPosted: Sun Jan 15, 2012 11:22 am Reply with quote
onearmdragon
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Thanks for the animation Radar, and the knowledge Slavia!

The end is pinned in place. The spring isn't terribly strong, perhaps I should replace it with something strong enough to require a compressor?

There was no seal of any sort on it.

Here's a couple of pictures of the chamber, do they look in good shape?

I'll get some seals, and post pictures once she's clean up and back in service Smile

http://imgur.com/a/H4fo9
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PostPosted: Sun Jan 15, 2012 12:40 pm Reply with quote
Slavia
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If it were mine I think that given the age I would forget power mods and concentrate on putting it back in service. My Hakim is like that - anemic but fun to shoot. I've got bigger hammers for bigger nails. As long as you're already inside it wouldn't be amiss to deburr and polish what you've got, though.

That breech seal looks pretty rough. If it's an "O" ring you shouldn't have any trouble replacing it. It it is a cylinder then you might have to cut one from tubing (or make a spacer and convert to an "O" ring). Or - if you're lucky maybe the other end can be used.

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Probably a "Telly" or "Jelly" 
PostPosted: Wed Jan 18, 2012 5:31 pm Reply with quote
RedFeather
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From what I can see in the pictures, you are missing the piston's seal. In the photo of the parts, there is a small, dark round something to the left. Is that the end cap or the leather seal from the piston? These guns used a basic leather piston seal much like an old bike pump. For more information, post your question, again, over on the American Vintage Airgun forum. (No, it's not for vintage American airguns, but an American forum for old ones. Very Happy ) They will be able to tell you exactly what you have and how to get it working. The seals can be made by hand, too.

http://www.network54.com/Forum/405945/
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Help me restore a 30 + year old break barrel. Need info 
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