The website build-a-gasifier.com has many free, downloadable plans for building a gasifier and gasifier. This site also has information on the history of gasification and uses for this process.
Gasification first came about in 1839, although the first wood gas-powered vehicle was not made until 1901. There was a surge in gasification during and directly after World War II. There has recently been a great surge in gasifiers and gasification due to their reliability and the ability granted by these systems for off-the-grid living. In addition to powering vehicles, gasification can also be used for stoves and furnaces.