- The walls were 450-500 C. The steel was loosing structural strength towards the end. I will try to stiffen with rebar next time.
- The sloped walls were effective in reflecting radiation downward.
- Not much air reaching the bottom so char was preserved. The sand seal on the bottom edge lost effectiveness as it dried. Will try bentonite.
- The side vents worked well. Tangental vents would be an improvement. I closed them when the char reached that level.
- I will try a top lit, batch burn next time.
- A floor is necessary to char from radiant heat.
- The char is good quality with little ash. Conversion efficiency seems quite good.
- I am going to build a small stainless model to test different style side vents. We can use it for demos later.
|Scott McKain's Wigwam Kiln|
|Sealed bottom of the Wigwam Kiln|
|Sides of the Wigwam Kiln|