Glenn Herbert wrote:The stove the women are making is not a rocket, but the techniques are applicable.
I have built a rocket bake oven and a rocket stove of cob. The oven has a cob L-tube with about 6" diameter, 2'+ horizontal and 30" vertical splitting into several channels under the (firebrick) oven floor and entering the oven at the edges, then leaving through a chimney. It takes some time to heat up, but bakes well. By the charring on the wood door, it gets to at least 400F inside.
The stove is all cob, formed around a sacrificial scrap wood inner 6" J-tube form, with a 1/8" steel cooktop, and a 6" stovepipe chimney leaving the space under the cooktop. It seems to work well in early trials after adjusting the gap between the riser and cooktop. 4" was too much, 2" or so is better. The riser is about 34" tall from burn tunnel floor, and could be shorter and would probably heat the cooktop better.
The inner form set in place on the base:
Burning out the form after applying the first layer of cob:
The finished stove:
The photobucket images don't want to show up apparently...
Satamax Antone wrote:The barrel is just a radiator.
If somebody can show me a rocket, with a barrel on top, as an outside test. With no chimney, flue or anything but the barrel on top of the heat riser, and a gap at the bottom of the barrel, to let the gases out. And this setup works without smoking or works as well as the same rocket without barrel. I want to see.
Except in a few and far between cases, where there is no chimney. And in these cases, the heat riser acts as a chimney anyway. A chimney is needed to run a Rocket. There is no sucking from the barrel.
Matt, you have heard that this is the case. But, it's all gibberish. Try the test i mention above. If the barrel was beneficial to the draft, a J tube rocket; feed tube, burn tunnel; and heat riser. Well made and properly insulated; would run better when we put a barrel over it. It's not!
Again, people will disagree. Guys, do the test.
If you want no barrel, it's perfectly possible.
Look at this one
How strange! No barrel? How can it work? And it's a J tube, not a Batch.
paul wheaton wrote:Set it up for $1 and then set it so that it is no more than $1 per month.
paul wheaton wrote:I just added this to the first post:
For $1 you get:
- Care and Feeding of a Rocket Mass Heater (30 minute video)
- Early access to podcasts (one week lead time)
- Early access to videos (one week lead time)
- 11 podcast review of "Botany in a Day"
- 10 podcast review of "Just Enough"
- Podcasts 1-120 in convenient zip files
- ability to make content suggestions
I'm open to suggestions on how to manage my patreon page. I am still quite new to it.
The video is out there now. The other stuff should be out there tomorrow.
I think that because my mix is really light (wood ash and all) it insulates well, which helps get the temps up. The other important detail is undersized bell leading to a hot chimney (not too hot, you'd have to work hard to get burned on it).
....The firebox mix is intended to be able to make anyplace in the world, by the poorest people.