Hand Cannons, Mortars, or Junk?

[fernando]

There is only one ignition, and apparently more than one way to ignite the powder charge inside the barrel. It may be by lighting a fuse that is introduced inside the touch hole; or pouring gunpowder in the pan and light it, the sparks entering the touch hole.
That is a rough way to put it. Surely more knowledged members can tell you better. Or you can learn the basics in the Internet .