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Post by matthewwalker on Jan 9, 2013 17:59:56 GMT -8
I thought I'd just put this here so you guys can see some of my recent experiments. I wasn't planning on posting these until I had done some more testing, but since Donkey's gonna delete it all anyway, why not a sneak preview. The first core I built to Peterberg's design spec. 6" riser. I had the half barrels already so a friend and I threw this up in an hour or two one evening. Now I'm using it as a BBQ smoker when the weather sucks. Note rat gun in the background.   And the next one, an 8 incher. She's a beast. Not sure where I'll install this one, anyone need a stove?  |
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Post by grizbach on Jan 9, 2013 18:48:25 GMT -8
That door does make it look finished off! Even though it's just a block.
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morticcio
Full Member
"The problem with internet quotes is that you can't always depend on their accuracy" - Aristotle
Posts: 371
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Post by morticcio on Jan 10, 2013 0:40:50 GMT -8
Both look great Matt - thanks for posting. I agree with Griz, the door finishes "the beast" off nicely.
How do they perform compared to a conventional vertical feed? Also is the lower half of the door for the air feed or door for cleaning ash etc.
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Post by matthewwalker on Jan 10, 2013 1:16:56 GMT -8
Thanks guys. Morticcio, I've had an IR gun on the six inch system a few times over the last two months. It appears to run a lot hotter than my J tube 8" system inside my home. I was regularly reading 700*F about 3" down from the top on the barrel face. My indoor system typically runs around 450*F at the same location. I do seem to go through a lot more wood in the batch configuration, but as I said above, I think I'm getting a lot more heat as well. They can certainly easily eat wood I can't fit into my home system, and they can burn less than ideal fuel when they are hot. That's been my experience so far, since I'm mostly feeding them the stuff I can't burn inside.
The door is actually two doors in the same frame. The lower one has intake air control by sliding the knob left or right. It's been neat to experiment with the different intake possibilities with the combo.
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morticcio
Full Member
"The problem with internet quotes is that you can't always depend on their accuracy" - Aristotle
Posts: 371
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Post by morticcio on Jan 10, 2013 2:59:10 GMT -8
Have you had any cracks in the casting?
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Post by matthewwalker on Jan 10, 2013 11:45:56 GMT -8
Yes, the portland/fireclay/sand/perlite is pretty brittle. The furnace cement/fireclay/perlite is better. Still cracks though. They don't bother me since these are wrapped in cob, but a stand alone core would need to be tougher.
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Post by Donkey on Feb 25, 2013 9:36:48 GMT -8
Matthew,
DUDE!!
I'm not going to kill this thread. Instead, it will move to a new home.
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Post by matthewwalker on Feb 25, 2013 14:11:29 GMT -8
Ha! Okay, thanks Donkey. I have since slid the 6" out of that system and slid the 8" with the door in. Put in a P channel, and promptly had the HOTTEST dang stove I've ever seen. Cooked the cast iron door white, and melted my temporary metal inner riser out in a matter of an hour or so.
Sliding the cores in and out of the "bay" that was created by cobbing around the first one was cool to say the least. It took all of 15 minutes to slide the one out, clean it up, slide the new one in, set the riser on, and cob on the barrel. Way cool. I've got pics, maybe I'll post some later.
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Post by pinhead on Feb 25, 2013 18:14:39 GMT -8
I built a 6-inch system for my small leaky shop and it puts out a LOT more heat than the convention 6-inch rocket. I'd love to see a pic and/or vid of your 8" batch system in full-burn.
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Post by Donkey on Feb 25, 2013 20:46:27 GMT -8
Me too!!
Post it, mate!
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Post by matthewwalker on Feb 27, 2013 22:02:48 GMT -8
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Post by matthewwalker on Feb 27, 2013 22:07:19 GMT -8
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Post by matthewwalker on Feb 27, 2013 22:11:26 GMT -8
And here it is getting really, really hot. No editing here, this one's unlisted on the 'tube, it's just for you guys.
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Post by pinhead on Feb 28, 2013 6:31:25 GMT -8
1000°C or 1000°F ? Either way, that temp on the barrel is pretty darn impressive! How large a gap do you have between the riser and the barrel? How tall is the riser? Is there enough draft for it to operate without smoking into the room with both doors wide open? Are you following Peterberg's recommended dimensions? |
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Post by matthewwalker on Feb 28, 2013 8:29:13 GMT -8
I'm using Fahrenheit on my IR thermometer. It's max reading is 1000* and it was over the threshold, so somewhere north of 1000*.
With both doors wide open it will smoke into the room, either through the P channel or the doors. It needs to be restricted some, how much depends on how hot it's running.
The dimensions of the front end are closer to that of a 6" system, feeding into an 8" riser. A few small deviations, but pretty close.
Edited to add: Riser is 31".
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