random bisbee

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since Jun 23, 2011
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Recent posts by random bisbee

I have updated the rocket stove with a new steel burn chamber and riser. Fire started hot and fast with a very good draw. Heated the hermit deluxe from 55 degrees to 80 degrees in about a hour keeping the stove roaring.
8 years ago
Mike
I have been guilty of that and I have seen the error of my ways. The combustion chamber (sheet metal) in my rocket stove has burned out with less than 20 to 30 hours of use and has made the stove unusable. Sheet metal pipe and fittings will not put up with the temperatures for long. But as it was only a prototype I will rebuild!!! I will working on a new "heavy metal" combustion chamber and riser design with all new drawings.

Dale
Wow!!! What a rocket stove!!! Do you have any drawings for your rocket stove. Maybe Height and diameter of riser? Type of insulation? Pictures during construction? Did you weld it yourself?

This summer I plan on building a much smaller down sized version and will play around with having a way to use it as a rocket stove and as a normal wood stove, I would like to be able to throw a load of wood in the fire box and have it burn through the night after going to bed.
I have been thinking about longer burn times, how about a sawdust filled coffee can as fuel for your new rocket stove? Please see http://www.youtube.com/watch?v=Qj7X9X8LTe0 and http://www.youtube.com/watch?v=B47AuaaRhtY Mount the coffee can under the insulated riser, the flame seemed robust enough. Or maybe build a rocket stove riser and exhaust chamber using a 16 gal drum onto the lid of the large sawdust stove. Wow 8 hour burn times and rocket stove too!
9 years ago
Thank you for your concerns and warnings. Galvanized pipe and fittings are readily available and fairly inexpensive hence there use in the prototype. All my exhaust fittings and pipe are either black or blued, regularly used for wood stoves. The life of the existing combustion chamber and riser is limited but replaceable when the combustion chamber burns out. I check for holes in the combustion chamber every time I remove the ash My next stove will have a heavy steel with no coatings or stainless combustion chamber and riser. I do believe that the 16 gal grease can and the 8" pipe and fittings (replaced with black pipe) used to hold the vermiculite around the riser tube can be used, as the exhaust chamber doesn't get hot enough to damage them. Look at the wielded thick steel rocket stoves or the fire brick and cob construction types with mass for your home they seem safe and reliable.
9 years ago
I recently updated the stove, seems to work better.
9 years ago
It seems some one has made a rocket stove breakthrough with the Kimberly stove. http://www.unforgettablefirellc.com/ Very costly and very little tech information but a breakthrough. Have you heard of a Swedish torch or a stump stove? How about a sawdust stove? Making a rocket stove out of wood, cool hey? Maybe this type of fuel could be used in a regular rocket for longer untended burn? It seems the new Kimberly stove works at it best with a 5lb extruded pressed log. How about surround the stump or sawdust fuel cell in metal with a air intake hole and a door to refuel the stove. Then add a insulated riser tube and sealed exhaust chamber over the stump or sawdust fuel cell, could make a cool rocket stove! Some of the stump stoves will burn from 2 to 8 hrs depending how big around and tall. Just a idea!
9 years ago
Don't why not. Maybe a double wall riser to bring the wood gas from the combustion chamber to either higher up in the riser or to the top of the riser. Tinyhouseblog.com just had blog post on a rocket stove boat heater. http://tinyhouseblog.com/heaters/roger-lehets-kimberly-stove/ Check it out!
9 years ago
Sounds like a great idea! If this hybrid process can increase riser temps, it should increase the draft though the stove. Can you post some pictures?
9 years ago
Wow!  yes you sure can. You would need to know how deep the water level in the well is first. Then install a proper hand pump on the well head. Please see: http://www.survivalunlimited.com/handwaterpumpdeep.htm I bet you could reuse the tank for garden water but you would also have to pump the water out the tank to use on the garden. Wouldn't it better to use the tank as a septic tank? How is the septic field?  It would make a great place for a off the grid tiny house..
9 years ago
I hope the fumes from the galvanized piping and fittings have already gone up the exhaust vent and are gone. All other external galvanized parts are painted with high temp paint and shouldn't cause any problems. 
9 years ago
Dave, I have heard the best height of the riser is about 36", my barrel just isn't tall enough. It's seems Len's hot water tank rocket stove design is better suited for a longer riser. Len, I heard the basic rocket stove design is similar to ancient wood fired pottery kiln design. The kiln had fresh air pumped in with hand bellows into the base of the riser just above the combustion chamber to increase temperatures in the kiln. My thought is to have a couple 1/2" to 3/4" pipes from the base of the riser above combustion chamber to the outside of the stove angled down so smoke will not come out. The pipes could supply fresh air at the base of the wood gas fire in the riser and increase combustion temperatures.The combustion gases flowing by the end of the pipes should draw fresh air into the riser not requiring any additional energy to move the air. Just a idea!
9 years ago