A big shout-out of thanks to Ian Fisher's students at the Umpqua Community College Welding Department! They have completed a set of drawings for the Oregon Kiln and for the Ring of Fire Kiln. Please share these far and wide. These are open source designs created by the Umpqua Biochar Education Team.
UBET Kiln Drawings are:
Open Source Design: Attribution-Share Alike CC BY-SA
Download the drawings here: