After seeing so many YouTube videos of the hobo stove and other wood high-efficiency stoves, I decided I'd build one myself. So, after eating the contents of two cans, here is the stove:
I will cover the side of the inner can with a cut-out aluminum plate. I will test this on my next camping trip.
The inner (smaller) can sits on top of three 1/2"-long bolts, and kept from shifting inside the larger can by three 1/2"-long bolts on the side of the larger can.
Top side of the poor man's version of a camping wood stove.
The holes on the bottom were punched with a nail. A number of them were enlarged with a drill bit. All the other holes on the walls were punched with a nail first then enlarged with a drill bit. The drill bit tore through the can as if it's paper so it left very jagged edges. I had to use a hammer to flatten down / smooth out the the jaggedness.
I think I will fashion a stand for a pot with a coat hanger.