3:00 The gap between the riser tube & the barrel surface is supposed to have a volume slightly less than the volume of the back exit of the burn box. According to some of the documentation I've seen from Wheaton labs. The goal is to create air flow similar to a Venturi burner in a propane burner/forge. For those interested there are hundreds of hours of good footage & plans on rocket mass heaters, Masonry stoves & the like. I personally like products like the TempCast masonry heater & Eastern European designs. They burn less than 2 hours a day & radiate heat much like this design all day after the fire goes out but are more clean & refined in their final design & build. The video posted after this on the German Tile stove is a fantastic example of this.
It’s true. I went from six chord a winter to two when I built a rocket mass heater. This example here has some issues. Number one you don’t damp these down. Burn them wide open and let the stone take care of long term heat. The whole premise of these stoves is a thin metal barrel cools as it radiates. This pumps the exhaust out. Otherwise the sideways burn wouldn’t work. You should do more homework before attempting to explain this. Matt Walker has multiple vids. Ernie and Erica do a nice job too. You only close a damper when the fire is out. Mine don’t smoke. There should be nothing around the barrel. Covering the barrel wrecks the main operation of the design. This design here is considered a batch box. Mine is a jtube. The long sideways burn helps with efficiency on a jtube. It can be done properly with a batch box but close attention needs to be paid to the air mixing and the flame path. They like to see a very turbulent flame entering the riser. It is compared to a rams head. Anyone considering this build should discard the idea of mudding in the barrel. The whole design hinges on that barrel shedding heat. You can run them without a chimney right out the wall when done right. There are better examples and I know what you mean about nobody explaining them so I made a shitty video doing just that. Going on ten years. I love my shop rocketstove. I work there and keep the temp up all winter. Sorry to criticize but co gas and creosote kill people and in your example they are playing with fire. Although it appears to work bravo, it is a bad example. Half covered barrels are for an experienced builder who makes modifications to get the gas out. Matt I’m sure you can guess what that mod is. Unfortunately they have a bell instead of a smoke pipe through solid mass. This even more so needs the draft to be pushed out instead of sucked. The bell science is so interesting. The only time these rocketstoves can really smoke is if you freeze your mass colder than outdoor temps but even then that barrel gets hot, the gases get pushed into the smoke pipe and then your making heat. Thanks for the video. It is a very interesting and technical build and although it’s not the best example it is a damn fine build with some technical equations. Hope this helps further define these beasts. I think they are the future. Now if I can just find a barrel my wife will let in the house.
it was a bit hard to understand the inner workings of that door and how low the barrel was, perhaps he had a firebox with an outlet that went under the barrel
Chimney of firebox went up INSIDE the barrel... to 2 inches away from the top...... and the gasses fell down 4 sides between the barrel and the brick outer walls to then find the "bench."
3:00 The gap between the riser tube & the barrel surface is supposed to have a volume slightly less than the volume of the back exit of the burn box. According to some of the documentation I've seen from Wheaton labs. The goal is to create air flow similar to a Venturi burner in a propane burner/forge. For those interested there are hundreds of hours of good footage & plans on rocket mass heaters, Masonry stoves & the like. I personally like products like the TempCast masonry heater & Eastern European designs. They burn less than 2 hours a day & radiate heat much like this design all day after the fire goes out but are more clean & refined in their final design & build. The video posted after this on the German Tile stove is a fantastic example of this.
thanks Matt
Zara, the media manager!
There are 7 holes above the glass in the door frame as well as the 3 square holes bottom section of the door frame.
I love it!!
It’s true. I went from six chord a winter to two when I built a rocket mass heater. This example here has some issues. Number one you don’t damp these down. Burn them wide open and let the stone take care of long term heat. The whole premise of these stoves is a thin metal barrel cools as it radiates. This pumps the exhaust out. Otherwise the sideways burn wouldn’t work.
You should do more homework before attempting to explain this. Matt Walker has multiple vids. Ernie and Erica do a nice job too. You only close a damper when the fire is out. Mine don’t smoke. There should be nothing around the barrel. Covering the barrel wrecks the main operation of the design. This design here is considered a batch box. Mine is a jtube. The long sideways burn helps with efficiency on a jtube. It can be done properly with a batch box but close attention needs to be paid to the air mixing and the flame path. They like to see a very turbulent flame entering the riser. It is compared to a rams head. Anyone considering this build should discard the idea of mudding in the barrel. The whole design hinges on that barrel shedding heat. You can run them without a chimney right out the wall when done right. There are better examples and I know what you mean about nobody explaining them so I made a shitty video doing just that. Going on ten years. I love my shop rocketstove. I work there and keep the temp up all winter. Sorry to criticize but co gas and creosote kill people and in your example they are playing with fire. Although it appears to work bravo, it is a bad example. Half covered barrels are for an experienced builder who makes modifications to get the gas out. Matt I’m sure you can guess what that mod is. Unfortunately they have a bell instead of a smoke pipe through solid mass. This even more so needs the draft to be pushed out instead of sucked. The bell science is so interesting. The only time these rocketstoves can really smoke is if you freeze your mass colder than outdoor temps but even then that barrel gets hot, the gases get pushed into the smoke pipe and then your making heat. Thanks for the video. It is a very interesting and technical build and although it’s not the best example it is a damn fine build with some technical equations. Hope this helps further define these beasts. I think they are the future. Now if I can just find a barrel my wife will let in the house.
it was a bit hard to understand the inner workings of that door and how low the barrel was, perhaps he had a firebox with an outlet that went under the barrel
Chimney of firebox went up INSIDE the barrel... to 2 inches away from the top...... and the gasses fell down 4 sides between the barrel and the brick outer walls to then find the "bench."