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Discussion Starter · #1 ·
Sure has been quiet around this forum recently. I was going to post this stuff when I finished but I guess I'll do progress reports.

A while back, Jack Hern acquired a wooden pattern that was made from measurements of an original 4 pounder that fought at the Alamo.
He sells this barrel in his 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.

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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.

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The trail will be made of 2.5" thick oak. For what it cost these days, it might as well be gold plated.

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The wood was cut and glued and then final cut.

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Discussion Starter · #2 ·
Glue up of the axle housing.

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1.5" axle not cut to final size until I get the wheels.


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Picture of a Hern Alamo 4 pounder.

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More pictures as I progress.
Trying to do my part to keep this forum alive.
Zulu
 

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Nice work Michael. Looks good.

Now you have a set jugs and fixtures to build split trail carriages for the Alamo 4 PDR barrel from Jack Hern. And, now Jack has some one to refer his customers to for a carriage.

Well done.
 

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Really nice work! That is going to be another beautiful cannon.
 

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Discussion Starter · #8 ·
A few more pictures.

I made the front transom longer than it should be until I get the overall trunnion spread. It has a 2.5 degree cut on each end. This is what makes the front of the trail narrower and the rear wider.
I had to have it in place to be able to mark the insets in the cheeks. They have to match the angle.
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Axle straps and axle bands. No holes drilled yet.
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Discussion Starter · #11 ·
I've been working on iron work.
Bending the 1/4" X 2 1/2" flat bar around the form I made.

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Odds and ends.


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I'm pretty much at a stand still until I receive the barrel and the wheels. Wheels should ship next week and I'm not sure about the barrel yet.
I have an email in to Jack Hern but haven't heard back from him so far.
Zulu
 

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Really nice work!
 

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Discussion Starter · #14 ·
Looking great Michael. I like the template for bending the trunnion plates. Useful.

The template is useful. Too bad it can only be used once. Chances of duplicating the exact carriage again are slim.
Now I have two of them. This one and the much bigger one from the Alamo carriage build. Giant paper weights!
Zulu

Wood Rectangle Bumper Machine tool Gas


Wheel Wood Rolling Automotive exterior Musical instrument accessory
 

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Mike, excellent work! I'll get back to mine now things to be settling down around here. BTW, the trunnion "notches" for the travel position weren't on the 4/ and later 6 pounder carriages if you are using a French/Spanish Gribeauval carriage as a reference..
 

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Mike, excellent work! I'll get back to mine now things to be settling down around here. BTW, the trunnion "notches" for the travel position weren't on the 4/ and later 6 pounder carriages if you are using a French/Spanish Gribeauval carriage as a reference..
This is from De Sheel's Treatise On Artillery, Donald Graves Ed. My scanner is down, had to take a picture..
 

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