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Post by PK on Nov 8, 2012 17:37:58 GMT
How about burying a container as they did with the Hitler bunker myth? Keep the cannon inside to contain the debris, pointed out the open end for the shot.
Sure, there would still be some glass outside it to deal with, but in a limited and controlled area.
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Post by Cybermortis on Nov 8, 2012 17:45:09 GMT
Possible, although it might prove troublesome in terms of setting up the camera and getting usable shots.
A larger area may be called for, and the military bunkers/buildings they have used would give them enough space to get multiple shots while providing more than enough protection.
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Post by freegan on Nov 8, 2012 20:31:44 GMT
From what little I know about toughening glass, after forming it is cooled in a precisely monitored process that pre-stresses the interior of the structure.
The consequence of this process is that failure of the structure is so catastrophic that there are no large shards or chunks but a multitude of small pieces (as with toughened windscreens and safety glass for doors).
I would expect that a thicker glass structure would have greater internal stresses resulting in something more reminiscent of sand, after a structural failure, especially from an explosion probably sending shock waves through the glass.
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bioLarzen
Demi-Minion
"I reject your avatars and substitute my own."
Posts: 86
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Post by bioLarzen on Nov 9, 2012 17:01:56 GMT
Seems like my little idea about the ice cannon is stirring reaction - should I open a seperate thread for it to avoid hijacking this thread or is it OK to leave the drama unfold here?
bio
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Post by PK on Nov 9, 2012 17:13:30 GMT
Seems like my little idea about the ice cannon is stirring reaction - should I open a seperate thread for it to avoid hijacking this thread or is it OK to leave the drama unfold here? bio Done. |
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Post by memeengine on Nov 9, 2012 17:15:18 GMT
Seems like my little idea about the ice cannon is stirring reaction - should I open a seperate thread for it to avoid hijacking this thread or is it OK to leave the drama unfold here? bio I'd leave it here. While the construction challenges would be different, the overall concept of a fragile material being used as a cannon is pretty much the same. |
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Post by PK on Nov 9, 2012 17:18:49 GMT
After reading through the discussion, it seemed to me to be different enough to merit it's own thread. Since the discussion was primarily about issues like construction & melting, I figured it would be easier to maintain two separate flows of ideas than have them intermixed.
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bioLarzen
Demi-Minion
"I reject your avatars and substitute my own."
Posts: 86
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Post by bioLarzen on Nov 9, 2012 17:29:53 GMT
After reading through the discussion, it seemed to me to be different enough to merit it's own thread. Since the discussion was primarily about issues like construction & melting, I figured it would be easier to maintain two separate flows of ideas than have them intermixed. OK, thx. bio |
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Post by trakmec on Nov 9, 2012 19:52:21 GMT
For the glass cannon, are we considering the use of ballistic glass, or just regular glass? I know the ballistics stuff can handle bullet and shell fragment impacts so it should make a functioning cannon (even if only once), but it is VERY expensive. If ballistic glass is in keeping with the myth. Here is one of the manufacturers with specifications : www.spartech.com/polycast/acryshieldL3.htmlcould this be laminated into a block big enough to machine the cannon from? |
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Post by memeengine on Nov 9, 2012 20:07:48 GMT
For the glass cannon, are we considering the use of ballistic glass, or just regular glass? I know the ballistics stuff can handle bullet and shell fragment impacts so it should make a functioning cannon (even if only once), but it is VERY expensive. If ballistic glass is in keeping with the myth. As we discussed earlier in the thread, the concept of a "glass cannon" is relatively new. So there's no reason to limit the myth to traditional types of glass from that point of view. However, the point of a glass cannon is that, while it can deliver a heavy punch, it is still very fragile. If you use a material that is too strong then all you really have is a conventional cannon that happens to be see-thru. |
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Post by trakmec on Nov 9, 2012 21:38:10 GMT
point made, I withdraw the suggestion
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Post by OziRiS on Nov 12, 2012 20:23:09 GMT
First on the safety issue: I agree that it should be indoors and I also agree that the "bunker" (which, to me at least, seems to be nothing more than a reinforced shipping container) might not be enough. But what if you buried it under a couple of feet of dirt like they did for the "Operation Valkyrie" myth? If the fragments go through the metal, there would be a couple feet of solid dirt to take the rest.
Now, on the glass issue: Are we staying away from the concept of laminated and layered safetyglass like they use for windshields in cars? If we'd allow that, it might just be a question of a sufficient amount of layers...
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Post by freegan on Nov 12, 2012 20:36:19 GMT
Are we staying away from the concept of laminated and layered safetyglass like they use for windshields in cars? If we'd allow that, it might just be a question of a sufficient amount of layers... I would expect that time constraints and the cost of construction would preclude the use of layered glass and I'm beginning to have doubts about tempered glass for the same reasons. |
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Post by joctrel on Feb 24, 2013 18:42:20 GMT
The thought crossed my mind today whether a Glass Cannon was an actual thing that could be made. I Googled it and Mythbusters, and this is what the internet gave me. Thanks be to the Internet.
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Post by Cybermortis on Feb 24, 2013 18:54:01 GMT
The thought crossed my mind today whether a Glass Cannon was an actual thing that could be made. I Googled it and Mythbusters, and this is what the internet gave me. Thanks be to the Internet. You are meant to worship me, not the internet! Its my board, my thread and I was the one who obtained the interviews with Dan Tapster, Robert Lee and Kari Byron...  The correct form of worship is to make two fists, put them together knuckle to knuckle then to open your arms while spreading your fingers, bowing and intoning 'All hail Cybermortis!'  |
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Post by PK on Feb 24, 2013 22:04:10 GMT
The correct form of worship is to make two fists, put them together knuckle to knuckle then to open your arms while spreading your fingers, bowing and intoning 'All hail Cybermortis!' So it's no longer raising your left hand, place your right palm in your left armpit, then bring your left elbow down sharply to create the proper sound of worship? Huh. {Not unless you want me to get the electrodes out again - CM} |
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Post by silverdragon on Feb 25, 2013 8:59:56 GMT
I am thinking this one through.
Glass is a form of petrified rock.... sort of.... (Just follow this a bit?..)
It has strength.
If you drill a hole in a good rock face, and pack it with explosives, if you dont pack it in well, it will just shoot out with some force..........
We all know you can get bullet resistant glass nowadays.....
So it can be quite strong......
So on that thinking, if you dont mind a cannon with a two foot plus thick wall and only a half inch bore, I can see no reason why you CANT make a workable cannon from a block of glass?.....
Its just that the finished product may require more than just the one horse to tow it somewhere...................
And also thinking through, even with tempered glass, re-load times may be hampered by having to let the thing cool for long-time between shots?... glass doesnt exactly loose heat quickly....
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Post by PK on Feb 25, 2013 16:33:32 GMT
Isn't bullet resistant "glass" actually a polycarbonate? That is to say a plastic, rather than actual glass?
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Post by Cybermortis on Feb 25, 2013 16:54:11 GMT
The major problem with glass its that while it is strong, it also has a fairly low fracture point due to its physical structure. This is why many types of glass show theoretical strengths comparable to good quality iron or even fair quality steels, but practical strengths only a third of that.
This rests with the elasticity of the materials. If you drop a one pound iron shot onto a sheet of metal the metal will distort, and while you might create a dent the sheet itself will still be intact. Do the same with glass and chances are you'll either shatter the glass outright, or at the very least crack it badly.
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Post by silverdragon on Feb 27, 2013 5:17:47 GMT
I suppose we need a definition of Cannon..... If its just something that "Shoots a projectile out", then a potato gun could be considered as Cannon?.... If you can use a lower powered explosive as the power behind the shot?.... If the shot only travels say 200 yards...... Is that still a cannon?... Or does it HAVE to shoot a projectile over the embankment through a van and up someone's sitars (oops...  ) to be a cannon?.... BTW, I dont know, is that accident a banned topic here?... if so, post can be edited to remove that reference?.... {The mishap with the cannon isn't a banned topic. For the record the shot went through a house and embedded itself in the dashboard of a van - CM} |
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) to be a cannon?....