The small drum must fit in the larger one with plenty of room to spare. Using a 30 gallon (113.6 L) drum inside a 55 gallon (208.2 L) drum works well. Use a metal jigsaw blade to make a square cut in the base of the larger drum. It should be about 12 inches (30.5 cm) by 20 inches (50.8 cm). This allows the extreme heat to pass into the the smaller drum, cooking the wood inside. Drill 5 or 6 1/2-inch holes in the base of the drum. Cherry wood, oak wood, or hickory wood chopped into 4-inch pieces is ideal. Pack the drum tightly, then put the lid on top, cracked so moisture can come out. Place two bricks flat in the bottom of the big drum, one on each side. Stand two more bricks on their long edges on top of the flat bricks. This stand keeps the smaller drum from touching the bottom of the bigger drum, allowing you to feed fuel underneath. Make sure it fits well within the larger drum; if it doesn't, use smaller bricks or stones to make a smaller stand. Put the lid on the larger drum, leaving it cracked open for air flow. Use wood and kindling to make a fire, feeding the materials through the feeder hole in the bottom of the drum. As the fire gets going, feed it larger pieces of wood.  Keep an eye on the fire; when it gets low, feed it more wood. After 7-8 hours, the impurities, moisture, and gasses will have burned out of the wood, leaving pure charcoal behind. Let the fire burn out and the entire contraption completely cool before you approach it. Empty the small drum into a container and store the charcoal for later use.
एक बड़ा और एक छोटा ड्रम खरीदें: बड़े ड्रम में ईंधन डालने के लिए एक हिस्सा काटें: छोटे ड्रम के तले में कुछ छेद करें: छोटे ड्रम को कटी हुई सूखी लकड़ियों से भरें: बड़े ड्रम में एक स्टैंड बनाएं: छोटे ड्रम को स्टैंड पर रखें: बड़े ड्रम के अंदर आग जलाएं और इसे 7-8 घंटों के लिए जलने दें: आग को पूरी तरह जलने दें: कोयला बाहर निकालें: