I'm planning on making a cannon with a bore of anywhere from 2 inches to 3/4 inches.

How thick should the wall be?

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    $\begingroup$ Welcome to the site user62348, please take the tour and read up in our help centre about how we work: How to Ask You'll discover when you browse the help center centre that your question doesn't fit on worldbuilding.se, I'd suggest that you consider Physics and take their tour and look at their help centre to see how to approach the issue. You would need to specify a metal, lead is a great deal softer than brass or steel for example, and a barking dog type cannon is a great deal smaller and slimmer than a "Tsar Cannon". $\endgroup$ – We are Monica. Mar 15 at 17:36
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    $\begingroup$ What kind of cannon? Medieval? Early modern? Modern? Naval? Anti-aircraft? What metal? Bronze? Steel? What propellan? Black powder? Modern smokeless powder? What projectiles? For a quick feel, look at the pictures of a 50 mm cannon and a 57 mm cannon. $\endgroup$ – AlexP Mar 15 at 17:44
  • $\begingroup$ A muzzle loading cannon, just to mess with, and a steel pipe, I cannot weld, assnd it would be black powder $\endgroup$ – user62348 Mar 15 at 17:45
  • $\begingroup$ It would also likely fire stone or metal balls $\endgroup$ – user62348 Mar 15 at 17:48
  • $\begingroup$ @Agrajag Please note that Physics SE would probably close this an an engineering question. $\endgroup$ – StephenG Mar 15 at 17:48

If this is the real world and not a fictional setting, don't do that at home. Seriously. The difference between a cannon and a pipe bomb is how thick the walls are, and how well the end caps fit.

  • Depending on where you live, you might break the law by doing gunsmith work without proper certification, too.
  • In the US, the cannon might be classified as a destructive device.

Where do you think the missing parts of this barrel went? enter image description here

That guy got lucky when his rifle malfunctioned. (graphic content)

enter image description here

This was war rather than an accident. (graphic content)

enter image description here

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    $\begingroup$ People have continued to express concern about this content; there's really no reason to have it visible. To be honest, I'm not sure I see the benefit of it at all. It's rather gratuitous, and doesn't do anything productive when it comes to actually answering the question. I'll leave it here for now, under spoilers, but . . . still. Please consider removing it, period. There are other ways to emphasize to the OP that this is a crappy/dangerous idea. $\endgroup$ – HDE 226868 Mar 17 at 1:32
  • $\begingroup$ @HDE226868, it seems to me that the OP is unintentionally trying to blow himself up. I feel morally compelled to do something. If I could read the access logs of this site with a halfway meaningful IP, I'd probably call his local police department. As it is, I can only warn. I want to do that in the strongest possible terms. Don't do that at home. You will be mutilated. $\endgroup$ – o.m. Mar 17 at 5:17

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