How strong are cartridges?
- Thread starter Derringeer
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Correct and thank you for posting the link for me. Resizing photos at time are challenging for me. I know just enough to really reek havoc on a computer and have difficulty doing what some folks do in a snap.
Back to the thumb nail, wound channel from the shrapnel was roughly 3 inches in length and scare is about 1 1/2 inches long. I have the case and piece of brass removed from my arm as well as a picture of the stitches in a shadow box at my reloading bench as a reminder.
Here is the explanation and pics of the gun that folks here (everyone I believe) said was a disaster waiting to happen...
https://thefiringline.com/forums/showthread.php?t=606411
"Why did my gun blow apart?"
You weren't making a gun but some type of potential pipe bomb.
You need to learn some about materials, gun powder, etc.
I think maybe this thread should be closed as well.
tipoc
https://thefiringline.com/forums/showthread.php?t=606411
"Why did my gun blow apart?"
You weren't making a gun but some type of potential pipe bomb.
You need to learn some about materials, gun powder, etc.
I think maybe this thread should be closed as well.
tipoc
Derringeer
New member
I can’t answear in the other thread so I’ll answear here instead..
I always test fire my experiments remotely, and I like to make them with weak materials sometimes because if I make a design that do hold up when it’s done weak, I know that the design is strong for that caliber and load. If it hold up with JB-weld for example, even when it’s fired with proof-rounds, I know that it will hold up even better if it’s welded.
The barrels themself are very strong for the black powder loads I use, so they won’t blow up.
Is the issue here the breech-hole? why doesn’t the recoil prevent the barrel from flying forward?
I made these pepperbox style guns: https://imgur.com/brxeUKY with basically the same concept as the gun that blow apart, with electric igniters inserted through a 0.05” inline hole in each breech of each barrel. Here’s some more details of the inside and the making of the ”receivers” of these guns: https://imgur.com/MMmU9ax https://imgur.com/OX8o4NC https://imgur.com/W9chvSl I haven’t had any issues with those yet, how come?
This is an earlier single shot derringer that I made https://imgur.com/gJgqjXD, it doesn’t have a hole in the breech but through the side like a classic muzzleloaded cannon, the barrel holds in place with magnets - and it works since the recoil is forcing the barrel/cannon backward and not forward.
Based on the guns above that is functional and other guns like this one https://youtu.be/J2tV-dsvPlg I still think it’s weird that the tiny hole in the breech was able to propell the whole barrel forward.. Compare it to a slamfire shotgun, that have the whole breech open.
Let me put it this way, if you would make a receiver to this particular gun that I’m working on right now, that blow apart, how would you design it? I’d like some input. The goal is to make a strong receiver that allow the ”barrel-packs” to easily be replaced, since the barrelpacks will act like magazines.
I always test fire my experiments remotely, and I like to make them with weak materials sometimes because if I make a design that do hold up when it’s done weak, I know that the design is strong for that caliber and load. If it hold up with JB-weld for example, even when it’s fired with proof-rounds, I know that it will hold up even better if it’s welded.
The barrels themself are very strong for the black powder loads I use, so they won’t blow up.
Is the issue here the breech-hole? why doesn’t the recoil prevent the barrel from flying forward?
I made these pepperbox style guns: https://imgur.com/brxeUKY with basically the same concept as the gun that blow apart, with electric igniters inserted through a 0.05” inline hole in each breech of each barrel. Here’s some more details of the inside and the making of the ”receivers” of these guns: https://imgur.com/MMmU9ax https://imgur.com/OX8o4NC https://imgur.com/W9chvSl I haven’t had any issues with those yet, how come?
This is an earlier single shot derringer that I made https://imgur.com/gJgqjXD, it doesn’t have a hole in the breech but through the side like a classic muzzleloaded cannon, the barrel holds in place with magnets - and it works since the recoil is forcing the barrel/cannon backward and not forward.
Based on the guns above that is functional and other guns like this one https://youtu.be/J2tV-dsvPlg I still think it’s weird that the tiny hole in the breech was able to propell the whole barrel forward.. Compare it to a slamfire shotgun, that have the whole breech open.
Let me put it this way, if you would make a receiver to this particular gun that I’m working on right now, that blow apart, how would you design it? I’d like some input. The goal is to make a strong receiver that allow the ”barrel-packs” to easily be replaced, since the barrelpacks will act like magazines.
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Derringeer,
A barrel has no recoil of its own. It is just a hollow cylinder and the pressure inside it pushes outward radially along its axis, trying to expand it. Pressure does not push it either forward or backward. Recoil all comes from pressure pushing back on the cartridge case which passes that force to the breech of the gun. Because the barrel is securely attached to the receiver through barrel threads and the receiver is securely attached to the breech through the gun's locking mechanism, the breech pulls the barrel back. It does not propel itself in any way.
For anyone who doesn't think a cartridge case can blow up, watch this video.
A barrel has no recoil of its own. It is just a hollow cylinder and the pressure inside it pushes outward radially along its axis, trying to expand it. Pressure does not push it either forward or backward. Recoil all comes from pressure pushing back on the cartridge case which passes that force to the breech of the gun. Because the barrel is securely attached to the receiver through barrel threads and the receiver is securely attached to the breech through the gun's locking mechanism, the breech pulls the barrel back. It does not propel itself in any way.
For anyone who doesn't think a cartridge case can blow up, watch this video.
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