Options for a very large touch hole in a miniature black powder cannon

[QuartersawnOak]

I have a cannon that has a 5mm touch hole opening. It looks like someones work that made it that way. I had one other of this type and the hole was half this size. Is there a fuse width to fit this opening or another option for ingnition? See photos. Thanks for suggestions.

 

[rafterob]

You can just have a little mound of powder on that and touch it off with a long match or make an old style fuse with a narrow cone of paper filled with powder.

 

[Flint62Smoothie]

Drill & tap it for a SS liner?

 

[SOLANCO]

You can just have a little mound of powder on that and touch it off with a long match or make an old style fuse with a narrow cone of paper filled with powder.

British ships had powder in bags to ram down the bore. The gunners had a horn at each gun for priming the touch hole.

 

[Rifleman1776]

It will go off with regular cannon fuse but you will have a mighty lot of fire coming out the top. Do consider the suggestion to tap, insert a ss plug and redrilling.

 

[Rich44]

Would recommend tapping with 6mmx1.0 tap as 5mm hole is the proper size. Use a 6mmx1.0 steel bolt with drilled 3/32 vent hole. That will accept 2mm fireworks fuse from Amazon. Would not use stainless as the desire is for it to blend in better, and it will outlast you anyway. Would like to add that not enough information has been given to say if it would be safe to fire.

 

[Billy Boy]

Drill it out, thread

I have a cannon that has a 5mm touch hole opening. It looks like someones work that made it that way. I had one other of this type and the hole was half this size. Is there a fuse width to fit this opening or another option for ingnition? See photos. Thanks for suggestions.View attachment 133651
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Drill and tap the hole to the next convenient size, screw in a bolt, cut it off then drill it as needed.