A while back, Hern Iron Works acquired a wooden pattern that was made from measurements of an original 4 pounder that fought at the Alamo.
They cast this barrel and have it in their line now.
I am currently in the process of making a split trail carriage for one of these.
The barrel is ordered as are the 42" wheels.
Barrel specs
630 lbs.
Details:
Over All Length: 54-3/4″
Bore: 3″
Trunnion Dia.: 3-1/2″
Trunnion OAL: 15″
Barrel Dia. behind Trunnions: 9″
Trun to Breach: 24″
Trun to Muzzle face: 26″
Breach max Dia.: 10-1/4″
Chase Dia behind Muzzle: 5-3/4″
Muzzle Swell max Dia.: 7″
I started with a drawing from Round Shot and Rammers. After determining my scale, I had it drawn out.
Here is the drawing of the trail cheek.
I cut the cheek template out in four pieces with a CNC wood carving machine.
I then transferred the DXF file of the rear piece to a CNC Plasmacam and cut the exact same patterns out of 1/4" plate steel.
Two pieces of that were welded together with a spread of 2.5".
This is exactly the size of the rear of the trail.
I will bolt this steel form to my outside work bench and heat and bend the 2.5" strapping around it.
This is the same process I used on the big Alamo carriage.
The trail will be made of 2.5" thick oak. For what it cost these days, it might as well be gold plated.
The wood was cut and glued and then final cut.
Glue up of the axle housing.
1.5" axle not cut to final size until I get the wheels.
This is a work in progress. More pictures as I move on with it.
Zulu