Yesterday before I went home, I went to empty the coal container and then crank the rest of the coal in the auger into the pot. The coal bin was empty for some time and the fire bed was half way down into the pot, at most, a quart of glowing coal, so I shut everything down and called it a day.
In the morning, I wanted to see if there was any clinker on top. The only ash on top was talcum-powder-like and I stirred it around with my hand. Added fresh coal to the bin and cranked it into the pot until the pot was full. To my surprise, I saw a few red coals in the mix, turned on the air and the pot came back to life after 17 hours of inactivity. I then remembered Joe saying the same thing when he tested in Shenandoah. (That unit has been in use the entire Winter at Sheridan, WY, heating a 7,000 sq. ft. space and has not had any problems at all). I had burned a total of 12 hours, (7 hours and 5 hours continuously,) about 35 gallons worth when I took the video below.http://www.youtube.com/watch?v=YFV3noFtg1A
We found a breaker in Montana that will properly size this soft coal from the Powder River Valley of Wyoming, which is the only type of bit coal that has been problem-free in our stoker at this time. The warm air furnace will be on display at the various shows in Wyoming starting soon.
Unless something changes, there is no reason for a rotating ring using the coal from the Powder River Valley. The clinkers are smaller than Anthracite and much softer. The fire held for 17 hours without any forced air, so I'm not concerned about outfires. The further testing with a furnace will begin in Wyoming in a few weeks. The unit will never be advertised as a Bit Burner, but the existing Sheridan stoker has run all Winter on bit without any problems.