Hi! I'm Dale and about 20 some years ago was voted most likely to become a mad scientist... I'm now finally trying to live up to those great expectations :singer: I found Hypography while looking for design tips using a charcoal retort fired by a rocket stove. My intent is to use fast growing biomass to make biochar/Terra Preta de Indio using a simple and efficient heat engine. I'm not particularly looking to learn big-picture subjects, mostly the great and small ideas that tinkerers find useful. Hope I can add to the knowledge here.