David Baillie is a very practical woodgasser, with a practical choice for his woodgas motivation - an old Ferguson TE-20 tractor!
"Did a test run today with a friend's bush hog cutting an overgrown pasture. All things considered it was a good test. The power is less then on gas for sure but it can still do the job easily. The cutters were dull, the grass was heavy and very dewey; about as heavy cutting as I'm likely to do. Consumption was about 7.5 gallons of softwood charcoal in a little over an hour for an equivalent of about a gallon of gas."