Looking for cannon plans.

[Lawdog]

I've been lusting after a muzzleloading cannon for years. I have a friend who just acquired a large lathe.
Does anyone know of a source for plans/drawings?
Say three foot long with a 1.7 inch (golf ball size) bore.
Several web links I looked at were infested with malware.
Any help would be appreciated.

 

[Commodore Swab]

Proper scale would result in a breach 3 times the bore. Trunions would be bore diameter as well. Keep the rings small and you can start sketching along those ratios. This is a shorty I am working on.

 

[PhDBrewer]

Here are a few...
Scale as mentioned above.

William

 

[Lawdog]

Thanks for the help. I knew this was the place to ask.