at work this morning, and while ridin with the boss man to the job, we're listening to talk radio. a man that was 10 or 11 when he saw this (WWII) asked a question: When he was a young boy he saw the troops pull into the lumber yards, fill up 55 gallon drums with saw dust and / or wood chips, and an air duct for the fire inside the drums. He said it appeared as if the vehicles were running off the woodchips and saw dust, as there was no other way of getting fuel into the vehicles. if this is the case, how would it work? the only thing I can think is the unburned gasses from the wood chips were sent through a line, much like a fuel line, into the combustion chambers where the spark plugs ignited the unburned gasses. they were normal internal combustion engines and not diesels, which is what brings me to think its the unburned gasses. thoughts?