For a school project, I have been building a miniature cannon, it was that or miniature steam engine, maybe I'll do that the second half of the semester. I fully intend on making it fully functional. Its not completely done yet but I thought I'd share some pictures of the progress.
The barrel was made from a 12" long 2.5" diameter piece of 4140 steel, it was sent out to another shop that specializes in deep hole drilling to drill the bore which is .50" in diameter and to a depth of roughly 10.25" I intend to mill out the trunnions from the band of metal you see in the middle and if need be drill and tap them for extensions to bring them to the outer edges of the side plates of the carriage.
The carriage is comprised of a mild steel square stock axle, turned down on the ends to accept the wheels which I purchased and are sand cast aluminum. The side plates are also mild steel and the trail is 6061 aluminum. The trail still has a fair amount of machining to be done to it to shape it. Also will need to drill and tap it for the elevation screw. The top straps to hold the cannon in place on the carriage will be made out of brass.
And for a nice little touch, the wheels are kept on the axle via AR-15 firing pin retaining pins. I will update it as progress is made, and should have videos up of the barrel being turned as well.
The barrel was made from a 12" long 2.5" diameter piece of 4140 steel, it was sent out to another shop that specializes in deep hole drilling to drill the bore which is .50" in diameter and to a depth of roughly 10.25" I intend to mill out the trunnions from the band of metal you see in the middle and if need be drill and tap them for extensions to bring them to the outer edges of the side plates of the carriage.
The carriage is comprised of a mild steel square stock axle, turned down on the ends to accept the wheels which I purchased and are sand cast aluminum. The side plates are also mild steel and the trail is 6061 aluminum. The trail still has a fair amount of machining to be done to it to shape it. Also will need to drill and tap it for the elevation screw. The top straps to hold the cannon in place on the carriage will be made out of brass.
And for a nice little touch, the wheels are kept on the axle via AR-15 firing pin retaining pins. I will update it as progress is made, and should have videos up of the barrel being turned as well.
