I made a cannon.

[Aerindel]

Core is a oil well drill shaft from Alaska. Forged reinforcement rings and straps and carriage parts.

2.75" bore. Firing concrete filled soda can projectiles.

Weight approx 150lbs.

 

[UserNameTaken]

I need one of these!

 

[Canon29]

One of these days... I'm going to attempt this with a log.

 

[Mountain trapper]

Nice. I made a smaller version of that years ago. For New Years eve at midnight I set it off in my front yard. Very impressive, except the concussion blew out 3 windows in the front of the house.