Experiment #3
The results
The 4 lb 10 oz metal bucket was filled with ~18 lbs of wood, metal lid without gasket loosely attached.
In a cold drizzle of rain the bucked was heated for ~2 hours before pyrolysis products started to burn.
The gases burned for ~1 hour.
The resulting charcoal weighed 4 lbs, 2 oz.
This is my best result so far. The open fire was not an efficient heater, my guess 50 - 100 lbs of wood used. The charaoal yield was better than I expected.
The Pictures
A 5 gallon metal pail of Red Oak over a fire with my helpers Chuck and Eva
The retort during pyrolysis with gaseous products burning
The cold bucket ~3/4 full of charcoal
The ~3 inch chunks of charcoal result