The issue with rocket stoves is not that they burn wood. The issue is they use less than 20 percent of the amount of wood to create the same heat. Also they use smaller woody material so they could use dead falls, under brush or bamboo. The other thing in the case of the tropics is the pigeon pea which is a staple of most of the hot areas is a bean that grows on a bush than gets about an inch and a half. When the plant is finished you have excellent firewood for cooking.
great stove now and find the hight for that extention you mentioned. I would be happy to use it as it is without changes. but it could always be better as any stove builder will firmly believe. you could sell that one to most people.
Interesting experiment. I'm curious, if you were to put a pan directly on top of that cooker, would it extinguish the flames? Would you have to put something between the pan and the top of the cooker to keep it running?
You are right. In this test I was just trying the forge out and did not use it to boil water. I had another ring that went on the top of the forge that had holes all around it that I used as a pot stand.
Not sure what would have happened if I had put a pot right on this stove because the fan would still be trying to force air through the stove.
Sorry man you are just increasing combustion due to an increase in air flow similar to how a blast furnace works. You are not generating wood gas and then reburning that gas to heat your water. You are doing one step similar to a campfire only slightly more efficient. This is a hobo stove at best
Hi, great start. Have you heard of a downdraft gasifier. It is very similar to your design, but the fans draws the air from the top and the exhaust gas is burned. You could use your fabrication techniques and similar materials to fabricate one .
forgive me are we not to use up (burn-up) all the wood in the world it is giving oxygen for the carbon that we produce we need more trees not wood gas stoves
The idea is, to use bits of dead wood, not live wood. It is designed to do this, to make it more efficient, not requiring large amounts of wood, thus it is a sustainable technology.
yea 100 yrs ago they said that coal was a clean fuel dead dry wood can be used for many things even compose to grow food better then burning it for gas then to have assthat dose not compose that well without added other items to make it GOOD enough for plant food
Problem is, it takes YEARS for the wood to decompose into something viable to plant in, and in the mean time, all that dead wood piles up in the forests, and in the mean time, we have problems like the California Brushfires, where the idiots in the California DNR make it illegal to harvest that dead wood for any use at all, and what happens? one stray spark, or some fool with a pyromaniac streak lights one fire, and THOUSANDS of acres and peoples homes are destroyed. Oh sure, it is ash THEN too
but then what happens? It takes a year or two for new growth to appear in the charred out forest. Ash is a LOT more fertile than you think. My grandpa used it in his garden all the time, and got some of the most HUMUNGOUS veggies out of there you've ever seen, without the use of chem fertilizers. Not arguing with the coal, it puts sulphur and other crap in the air that we shouldn't be breathing, but is leaving deadfall and underbrush alone worth peoples lives and billions in damage? I say no.
Also notice, that there is very little ash left, as it performs an almost complete burn, due to the addition of the air flow. Considering the amount of wood he used, I think there was less than 10% of the volume of ash compared to how much wood there was to start. That is how proper combustion is supposed to be, perfect combustion leaves only two by-products, CO2 and water vapor. Though this isn't perfect, it is a lot better than an open fire pit for camping.
With an open fire, you get lots of ash from incomplete burning, a lot of smoke, which is unburned gasses and particulate ash, and the CO2 and water vapor. I'd rather see these used than an open fire.
yes lets keep digging for coal and gas, a few more mines makes sense. or, hold on a renewable energy source, wood! lets all take a second here n think.
Very Nice Video Hiram. What are the 3 additional holes for on the top of the can?
If you were to put a pot on that campstove/forge would it smother the fire, also if you put a pot on it how would you be able to feed more firewood into the fire? I have a concept stove I am building this evening but it is too windy to test it out tonight. I will post my video shortly. Have A Happy New Year!
Thats not a wood gas stove, Thats a camp fire in a can with a little fan acting as a bellows you got there.
The concept of the wood gas stove is that in essence its like an engine, It reburns its own exhaust, that is what makes it burn clean without much smoke or flames shooting out, The flames, smoke, embers and everything are kept swirling inside the can, All that exscapes is the heat thru the top but no flames should be shooting out of the thing.
Thank you for your input, but I think you missed the meaning of this vid. Others have used fans on their stoves and I say that this is really more of a forge than a wood gas stove. I look forward to seeing some of your work.
Its difficult to comment on these videos without seeming overly critical, im just mentioning that the wood gas stoves purpose is efficiency, a little wood should burn a long time till fully consumed once the gas starts being produced, but... the fan rams oxygen into he fire and will burn away your fuel that much faster which defeats the efficiency point of the stove.
experimenting is good so please dont mind my comment and enjoy your hobby. :)
i think a model aeroplane propellor might be much more efficient
davidvwilliamson 4 months ago
Basically the same idea as a pellet stove.
ohm1163058 11 months ago
@RCvolunteer1978
The issue with rocket stoves is not that they burn wood. The issue is they use less than 20 percent of the amount of wood to create the same heat. Also they use smaller woody material so they could use dead falls, under brush or bamboo. The other thing in the case of the tropics is the pigeon pea which is a staple of most of the hot areas is a bean that grows on a bush than gets about an inch and a half. When the plant is finished you have excellent firewood for cooking.
sizemorej 1 year ago
@sizemorej plant more trees simple plant more trees
RCvolunteer1978 7 months ago
Yes, it IS a sustainable technology (love that word); "SUSTAINABLE"!
TomPauley 1 year ago
great stove now and find the hight for that extention you mentioned. I would be happy to use it as it is without changes. but it could always be better as any stove builder will firmly believe. you could sell that one to most people.
great stove thanks
badphobar 2 years ago
Interesting experiment. I'm curious, if you were to put a pan directly on top of that cooker, would it extinguish the flames? Would you have to put something between the pan and the top of the cooker to keep it running?
rickvanman 2 years ago
You are right. In this test I was just trying the forge out and did not use it to boil water. I had another ring that went on the top of the forge that had holes all around it that I used as a pot stand.
Not sure what would have happened if I had put a pot right on this stove because the fan would still be trying to force air through the stove.
Good observation on your part though. Thanks.
hiramcook 2 years ago
@rickvanman why would it go out the fan still provides the oxygen
MrHoustonsk8er 1 year ago
Once it was going good, you could drop a couple charcoal briquettes down in there to keep it going good and hot for a lot longer time.
jiro9cuts0001 2 years ago
Sorry man you are just increasing combustion due to an increase in air flow similar to how a blast furnace works. You are not generating wood gas and then reburning that gas to heat your water. You are doing one step similar to a campfire only slightly more efficient. This is a hobo stove at best
lakewood85 2 years ago
Hi, great start. Have you heard of a downdraft gasifier. It is very similar to your design, but the fans draws the air from the top and the exhaust gas is burned. You could use your fabrication techniques and similar materials to fabricate one .
odinthor11 2 years ago
forgive me are we not to use up (burn-up) all the wood in the world it is giving oxygen for the carbon that we produce we need more trees not wood gas stoves
RCvolunteer1978 2 years ago
You are very correct and that the point of these "wood gas" stoves, to get as much or more heat while using less wood. Thank you for your comment.
hiramcook 2 years ago
The idea is, to use bits of dead wood, not live wood. It is designed to do this, to make it more efficient, not requiring large amounts of wood, thus it is a sustainable technology.
jiro9cuts0001 2 years ago
yea 100 yrs ago they said that coal was a clean fuel dead dry wood can be used for many things even compose to grow food better then burning it for gas then to have assthat dose not compose that well without added other items to make it GOOD enough for plant food
RCvolunteer1978 2 years ago
Problem is, it takes YEARS for the wood to decompose into something viable to plant in, and in the mean time, all that dead wood piles up in the forests, and in the mean time, we have problems like the California Brushfires, where the idiots in the California DNR make it illegal to harvest that dead wood for any use at all, and what happens? one stray spark, or some fool with a pyromaniac streak lights one fire, and THOUSANDS of acres and peoples homes are destroyed. Oh sure, it is ash THEN too
jiro9cuts0001 2 years ago
but then what happens? It takes a year or two for new growth to appear in the charred out forest. Ash is a LOT more fertile than you think. My grandpa used it in his garden all the time, and got some of the most HUMUNGOUS veggies out of there you've ever seen, without the use of chem fertilizers. Not arguing with the coal, it puts sulphur and other crap in the air that we shouldn't be breathing, but is leaving deadfall and underbrush alone worth peoples lives and billions in damage? I say no.
jiro9cuts0001 2 years ago
Also notice, that there is very little ash left, as it performs an almost complete burn, due to the addition of the air flow. Considering the amount of wood he used, I think there was less than 10% of the volume of ash compared to how much wood there was to start. That is how proper combustion is supposed to be, perfect combustion leaves only two by-products, CO2 and water vapor. Though this isn't perfect, it is a lot better than an open fire pit for camping.
jiro9cuts0001 2 years ago
With an open fire, you get lots of ash from incomplete burning, a lot of smoke, which is unburned gasses and particulate ash, and the CO2 and water vapor. I'd rather see these used than an open fire.
jiro9cuts0001 2 years ago
@RCvolunteer1978
yes lets keep digging for coal and gas, a few more mines makes sense. or, hold on a renewable energy source, wood! lets all take a second here n think.
smokeycanopy 7 months ago
i have the same torch
codydean10 2 years ago
It is a handy little torch. I got mine at Harbor Freight.
hiramcook 2 years ago
Very Nice Video Hiram. What are the 3 additional holes for on the top of the can?
If you were to put a pot on that campstove/forge would it smother the fire, also if you put a pot on it how would you be able to feed more firewood into the fire? I have a concept stove I am building this evening but it is too windy to test it out tonight. I will post my video shortly. Have A Happy New Year!
itisnow2009 3 years ago
Thats not a wood gas stove, Thats a camp fire in a can with a little fan acting as a bellows you got there.
The concept of the wood gas stove is that in essence its like an engine, It reburns its own exhaust, that is what makes it burn clean without much smoke or flames shooting out, The flames, smoke, embers and everything are kept swirling inside the can, All that exscapes is the heat thru the top but no flames should be shooting out of the thing.
The fan you have in the bottom ruins it.
Taino187 3 years ago
Thank you for your input, but I think you missed the meaning of this vid. Others have used fans on their stoves and I say that this is really more of a forge than a wood gas stove. I look forward to seeing some of your work.
hiramcook 3 years ago
Its difficult to comment on these videos without seeming overly critical, im just mentioning that the wood gas stoves purpose is efficiency, a little wood should burn a long time till fully consumed once the gas starts being produced, but... the fan rams oxygen into he fire and will burn away your fuel that much faster which defeats the efficiency point of the stove.
experimenting is good so please dont mind my comment and enjoy your hobby. :)
Taino187 3 years ago
If you design the extension part like a rocket nozzle ^ with a good sized opening the fire will come out more streamlined and focused..imho.
Aslanspal 3 years ago
how do you cut the holes in the can ??
skaterdude1229 3 years ago
Doesn't some coals drop into the fan and by that destroy it?
T3hJones 3 years ago
what do you think would happen if you put the fan in the can , with enough room for the can,
i think it would be like knowledge publications
marieomagpie 3 years ago
You would need a larger can and you would also need to protect the fan from the heat.
This way you can use the stove without the fan if you elevate the can so it can get air through the bottom.
hiramcook 3 years ago
thats very interesting i was trying to make one of those , good design thank you
marieomagpie 3 years ago
I prefer your fan-less design, far more practical in an off-grid situation.
taliesin369 3 years ago 2