After the flow of oil to Norway and Sweden was cut off by the Germans, residents had to find a way to regain mobility. A simple smoker in the trunk did the job. Wood was cooked in the smoker, creating a wood gas that was piped to the carburetor.
Wood consists of two distinct fuels.
These gases are Visible as smoke and flame. The complete burning of these gases has long been the main concern of engineers and designers seeking clean wood-burning devices. In designing the Excel and Solo Plus Series, TARM engineers decided that the best way to burn these gases was to use a firebox with two distinct chambers. The burning occurs at the bottom of the firebox and the heat from the fire bakes the wood above releasing the wood gas from the fuel. The combustion draft fan then blows these gases through the live coals and into the superheated ceramic tunnel where secondary air is injected to complete the burning process.