A full day of welding and cutting and welding and the cook chamber is taking shape. Here are a few more pictures:
Here is a view showing the duct welded to to the outside of the drum:
It penetrates approximately four inches into the drum as shown here:
As you can see, the duct is continued for the length of the cooker on the sides only. I will cover the duct with plates that can be moved to create gaps anywhere along the duct to tune the smoke and heat. Here is a large plate in place. I won't have any that large, but it is all I had to show the design today:
Here is a neat view looking down the open end of the cooker at duct level towards the penetration:
Here is a view of the whole thing:
You can see the door opening, the angle welded in to hold the cooking grates (I have a half sheet of expanded carbon steel to play with), and the duct with one of the covers.
It is coming together pretty much how I want it to. The double walled drum is stout. I'd much rather have 1/4" rolled steel, but maybe the second one!