I'm sorry if I'm off subject a bit, but here it is. How I intend to do my charcoal production.
I preburn my oak for coals (especially if it's a bit green), and use them instead of continuously adding hardwood charcoal, It's more labor intensive, but the rewards are far less expensive for me as I can cut down trees and burn them down to coals that can be shoveled into the firebox. For green wood this is a must. Making hardwood charcoal is also somewhat labor intensive, but again you receive the rewards of your labor. If I ever get my own home, and some land, I will continue this until the day I die. I find enjoyment in doing this because, I'm in control of the consistency of my fire and temps; moreover those nasty corporations don't get as much of my money (Gold Bug here) and I feel closer to nature. Smells great, too. I love the smell of freshly cut wood, especially hickory, oak and pecan.
Best of Luck,
Wood Gas Truck:http://www.youtube.com/watch?v=hSgL0Ie4zrI
Wood Gas stove:http://www.youtube.com/watch?v=pyofhLYYVC8
What I like the most about this is type of energy is it can be used to run a rotisserie motor, the truck to transport you pull behind, or whatever. At compitetion there would be no need for outside energy sources. I hate waste.