Gasifier
I'm watching a TV series (from 2010?) called 'Colony.' It's another survivor series, but this one is actually educational.
In the first few episodes the 'apocalyptic' survivors scrapped together a working gasifier. Two metal barrels of different sizes: large wood chips in the bottom, more chips in the inner barrel. The inner barrel is closed except for an extended tube. The bottom chips are manually burned while the inner heats up and produces the 'fuel' which is then tubed out to a scrapped remodeled generator that charged daisy-chained batteries. The fuel tank on the small engine serving the generator was by-passed and fueled directly to the carburetor.
I haven't gotten much further into the series to see if any alternative methods of transportation are modeled, but found the gasifier interesting.
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