Typical inverted downdraft gasifier run, No. 5, p. 92, Book
II, showing initial stable combustion at 12 g/min, pan on at 11 min, water boiling at 19 min, primary air turned to 20% for simmering at 20 min, and a yield of 150 g charcoal

see: http://www.bioenergylists.org/node/2559
iddc4.jpgAir Force 1 Sage Low