Several things to add: there's to be certain height of chimney tube for max efficacy: the afterburner effect for the flammable volatile products of wood pyrolysis, which are burnt while acsending. For 100 mm diameter chimney, it's to be at least 600(!) mm height. Secondary contour as small holes in chimney additionally deliver air for more complete combustion, reducing height for 6-8%. Also, the horizontal feeding tube doesn't allow wood to drop by it's weight into the combustion area. Though these stoves are for cooking seemingly - size and flame! "Perfect" rocket stove works by heated gases only, however they may get to 1000*C = 1832*F!
Great video and good explanation of the basics. I like the idea of using angle iron in order to ensure the airflow isn't blocked. I guess the same is achieved by adding a 45 degrees tube or pipe as fuel feeder, which leaves the horizontal arm free for intake of air. Another idea would be to add a small grill at the point where the three tubes meet, and underneath add a sliding pan with its own opening that collects the ash, and can be removed even when the fire is still going, and emptied. I'll know more as soon as I've tried to build one myself. Regards.
Your work and explinations are perfect. For an easy add on, weld a small pipe to the top inside of the combustion chamber. This should give super hot air.
Thank you for the inspiration to finally start using my brand new welder which has been sitting in our shop for over a year now. I feel like I can make a rocket stove and may experiment with a gravity fed method for “fuel” to add itself in as required for longer cooking cycles.
Whole point of using a J-tube, and with a grating under the burn area, is that the sticks will gravity-feed, instead of snuffing itself. the L-tube needs constant minding to feed the sticks into it. KEY to any rocket stove: The riser tube needs to be about double the length of the burn tube section. Here's what I want: A core-unit that will last as long as possible, that allows somewhat bigger sticks, like a Masonry mass stove does. A J-tube that is sturdy enough it lasts so it can be built into mass we build around it by our old fireplace.
Your rocket stove is using the fuel way more efficiently, that’s one reason the fuel last longer. Would it be possible to add a trap door on the bottom to dump out the ash? Love the build. Keep pushing the boundaries.
I was thinking of a rod attached to a plate that butts up against the back wall of the upright. You could just pull the rod toward the front to scrape out the ashes. I like your idea too, for a freestanding stove. I'm going to build a rocket mass heater into a cob bench though.
Of all diy videos I've seen, your welds appear to be the absolute best. Very nice craftsmanship! Most others leave their metal parts looking like they're adhered together with chewed bubblegum.
Hi -- my question as a random arm chair pretend expert person: Why not leave the bottom of the vertical tube open so that ash falls out? That might also work as the cold air inlet. Then your fuel tube can be sealed, with a lid that has a spring mechanism to push the splinters as they burn up.
I want a "U" shape so it can have a verticle feed and firr on one side, chimmey on other side. (Middle section should not be the main burning chamber.) Clean ash out with shop vac.
Your stoves look absolutely beautiful. I would make the chimney longer but i totally understand your explanation why you dont. Your metal looks so great it almost seems a sin to paint it
Love the subtitles that finish the sentences you don't. If you could make an app that did that in live conversation, you would put a bunch of therapists out of work!
I Built a rocket stove from some stove-pipe and elbows, no air-chamber, just feeding sticks as they disappeared. Sounded great and the thin metal glowed red sometimes.
Excellent description and build quality man !. Like your dumbell positioning device. My welding reminds me of one chicken crapping in a box. Thanks. Dave
Rocket stove. Intake =X, Exhaust >X. I think everything you've made pretty much fits that. I don't have a welder so mine are brick, cement, and tin. Dad often told me to utilize my resources. And that's what I do. Love the taste of meat cooked over sticks. I haven't bought gas or charcoal to cook outside with for 25 years. Peace brother.
Most wood stoves exibit the aspects of a rocket stove when their first lit, especially when leaving the door slightly open as the wood starts to light off, and it starts to roar like a rocket,but its impractical to run a wood stove at that level, as the wood consumption would be very high as well as the heat output.
It looks to me like the beauty of the J style over your L style of stove is that it is self feeding. I like this video, you did a good job and provided a nice, simple explanation
Very high quality work great craftsmanship and video is very interesting and informative. Good video to watch if you’re looking to build your self a rocket stove. Thanks for sharing mate! Tim in Michigan-usa
Great welds. If you cut into the side of your pipe where the upright pice is ten to twenty m.m. below the wood insert pipe you have a place for your ash. Also if you put it on a cinder block it will be taller and a small metal can in cinder block is easy to remove and dump.
Maybe cut a square hole underneath and add a slide out tray to dump ash out occasionally. Could use 2 bits of small L bracket as guides and a bit of 2 mil steel as the tray.
Maybe expand on the principles of Gasification primary and secondary burners and why a highly insulated (2nd burner with added air feed) high temp combustion chamber for the wood gas enable complete combustion (heat generation) of the wood stock. ie Highly Efficient.
I know this has been out a couple years but you are very informative and I have learned a lot from you Thank you. Also would love to have one of your hot water tanks for an off grid hot tub
im thinking of building a conventional block bbq in the back yard but also incorperating a large rocket stove into in to use as a wok burner etc , would u have any ideas on the design and best way to incorperate it into the bbq , thanks i really like your work that pressure cyd stove / hot water system is a beast
i like the "V" fuel tray i would enlarge it to the back wall of the chimney and eventually made of steel mesh instead of solid V steel stock for better ventilation and holding the bigger embers over the air stream.
Nice explanation on stove function, I made a double burner rocket stove along with a hot plate attachment, it has a on/off flap if your cooking on one side, a air control door for flame control, and a slide door at bottom for ash also use for secondary air flow. But nice small stove and info thanks for sharing.
VERY nice build quality. You could use them as axle stands when you aren't brewing a cuppa...! when I was 11 I now realise I made basically what was a rocket stove (or furnace actually it was that imposing!) The bottom section (horizontal) was made of bricks fastened with clay, the chimney was made from a 3 foot section of steel gate post about 4 x 3 inches.That thing was scary it roared so much and was red hot at times great big blue/orange flame shooting out the top I read somewhere about the designers of high performance steam trains, they uused a secondary burning chamber for better fuel efficiency. I think some top range woodburning stoves use the same principle, recirculate and burn the smoke
i light mine and walk away for 1hr !! wood port at 50 degrees, would slide in automatic, (gravity) air intake below the wood intake.. grid added, acts as a choke, wood lasts 30% longer
The design of the air inlet at the bottom should be such that all the ash that forms due to burning gets pushed down through it due to gravity. An inclined intet or say upward looking air chamber through which the ash can slip and air can enter. And a mesh separating the burning chamber and the air inlet pipe.
Great explaination of rocket stove theory. I believe that a lot of the makers of rocket stoves could benefit from watching this as a refresher course. Thanks!
I am in Las Vegas, NV. With all of the construction there is illegal dumping. I went to a empty lot by me with only a lighter found 1-good(chipped a tunnel on one end for fuel) 2-broken cinder blocks used sand as a gasket. Was full steam ahead in 5 min. FOR FREE.
If you have a build up of ash it's an incomplete combustion. Your dimensions could be altered to make it burn more completely. The flow is the most important part.
Yes indeed 👍 really comes down to what you're trying to achieve. Something small and portable with a shorter burn time or something a little bit more grand. The design on the bench is designed to be as light and as small as possible, but still achieve a usable amount of heat. The runtime is about 35 minutes before you need to start clearing the ash, depending on wood of course.
It's about the same size as the DK Rocket Stove that dosent create ash. If you adjust the air flow percentage to he optimal it burns everything.. Its like a carburetor the ratio is really critical to get the clean burn. The DK also does not require insulation to achieve this. And was the original all steel portable stove design. You might not have seen then as non have been exported to your country but worth looking at that achieve up to 1100c with almost but not quite your dimensions
Thanks for the great video. Good explanation of the combustion issues and I like your flame maintenance slot in the fuel stick tray and classy welding. Keep exploring. I make tiny light (SS or titanium foil) Aussie stoves for alpine backpacking (described in the links below). They are kind of 'rockety' but, at as little as 500g weight, they don't qualify fully because they have no heat riser (metal, ceramic, round, square or otherwise). However, they have ceramic lining in the hottest parts (to retain heat for initial combustion and protect the metal) and have 'J-style' fuel stick feeders that let the sticks feed themselves into the pyrolysis chamber that naturally regulates the amount of fuel that can be pyrolysed at any time (like yours). The steady plume of wood gas completes its combustion, in the stove box/cooktop/ heater, having passed through a bed of glowing charcoal and air mixing is aided by rapid changes of direction of gas flow within the stove box. The combustion is very clean and efficient (only~400g/hr with no significant smoke or any sparks from the flue pipe). Most of the air enters between the sticks (no separate air path as in yours) and the stove makes a quiet chuffing sound which I think results from the burn rate pulsating during the natural self regulation process. As in your stove, ash builds up at the bottom of the J-tube and restricts the burn chamber volume, but it is slow to accumulate and can be pushed out of the way into the stove box. The useful heat output is from the stove box inside the tent. I view them as regulated smoke generators that burn the smoke completely. I would be interested in your comments and if you think I have a correct understanding of the combustion process. timtinker.com/ultralight-tent-stove-part-2/ timtinker.com/larger-ultralight-tent-stove/ Tim
That's a really nice stove you have there, very unique and practical. I think you're on the money, I honestly can't think of anything to add or say that you haven't already said. Good job, mate.
Hey man, thank you from the U.S. I got the idea to make one of these and your videos are in the top best of all the ones I've seen. Thanks from another diy guy.
We’re you going to explain the J type pros great welding never stop designing and testing ideas (and prices) love to follow your design’s wishing I still had my mig. How about one with an electric gen attached working off the outlet force
The easiest way to make a rocket stove is, if you don't have a welding machine, to cut an enterance for wood, at the base of a tube - will resemble those built from bricks.
Still some improvements by closing off the fuel input area and putting an adjustable damper on the air feed. Too much air in-rush can actually cool the burn, which drops efficiency. (Idea to burn the secondary gases produced by burning the primary fuel.) Not exactly about maximizing airflow as it is about controlling it. But I understand this is cheap and simple, so it is what it is.
Look at the fuel intake, it is already angled downwards. That will help but a larger and steeper fuel intake would keep the fire burning for longer. The problem with the ash build up would however be bigger, but maybe a sump in -built would help?
I think you are through the apprentice phase Sir. Others have noticed your welding skill as have I. Other people ask whether you sell these as well. I Sir wish I had plans and drawings so I may be able to attempt to duplicate those welds myself. I don't mind having to grind some I can't see and braille welding is the only option. Thank you.
What if you created a slightly modified version where instead of the L shape alone you added a sort of reservoir at the bottom - so extending the vertical part of the L shape below the horizontal part just enough to create a sort containment for the ash? I imagine you could extend the life of the fire this way but perhaps also if you do this and add a trap door you can let out the ash quickly and continue the burn...
I am wondering if you could make a combination woodstove and rocket stove so that it would burn for many hours ??? Would be interested in purchasing one of them from you Little Aussie Rockets if you would get back to me with a quote??? Thanks for the lesson on the ins and outs of this stove. Good Day Mate too.
Regular wood stove or fireplace with chimney does the same thing, or can if you adjust the flue, fuel, etc. correctly. Rocket stove does it with smaller pieces. It burns the same amount of wood more efficiently by mixing more completely with oxygen, so less of your combustible wood is turning to gas and then drifting out your chimney (smoke). So a good analogy how it burns less wood, a rocket stove is like fuel injected engine spraying gas in a fine mist into the combustion chamber to mix with oxygen vs. if you just had a big flaming puddle of gas in each cylinder.
Hah, I just recently had the exact same debate about the importance of "how" you burn fuel, air having crucial part in it.. Funny how so many think that only large energy corporations with their large ovens can burn things efficiently and cleanly.. especially energy companies are very resistant towards people making a sort mini powerplants to burn their own trashes and whatever fuel is available really, I wonder why is that.. :D
To get rid of the ash why not place a pull/push rod attached to the angle section with 2 nuts and the rod sliding thru them with a small scrap plate attached to the rod that slides all the way back to the main section of the long side of your 75mm square tube . .At the start the rod and plate are fully in the rear position to clean just pull the rod forward .
Agreed. I’d be in for at least one as well. They look very nice, the welds look great and you clearly know what you’re doing. I’d say they’re well worth it.
Hey dude. Bead looks great. Keep developing. Loved the video. But since I'm in the U.S. the fire would shoot out the bottom. You know like the water swirling opposite!!!!😅!!!!! But seriously if you could make door / push rod combo that would seal well, could that deal with ash control and help stop / prolong burn time? Would it even be worth the time involved? Good luck
Does the air flow eventually become hampered by ash blocking the bottom vent. Wouldn't leaving the mouth open give it a longer burn time? And also a place for a excess ash to go? It's just that I have an old one that seems to work just fine. I can keep it burning for ages, which is important, as it gets cold where I am. It also has a few holes drilled into it on the sides at the bottom of the chimney which also helps on a long burn.
TIL why the fuel lasts longer in a rocket stove. The other stuff, I pretty much knew the physics of, but I hadn't ever really thought about why rocket stoves are more fuel efficient.
To clean out ashes from your rocket stove ,take a metal spatula and bend the handle so you can reach in with it an scrap out the ashes. It will only take a few seconds to clean out.
How much do u charge for one of your stoves? I live n USA.....also do u sell them non painted just with the shiny stainless look cause thats my favorite .... ,U have made a nice Rocket Stove with some of the best welds anyone could do,very professional quality welds and look
Thanks mate, I'm moving away from this style of stove as it was taking too much time. I have developed a DIY flatpack stove that joins together with twist tabs, which we are selling for AU $200 plus postage and are just starting to experiment with sending them overseas, our first one was Sweden two days ago, and we've been quoted around $80 postage to the US by air freight with tracking, so if you are interested, happy to talk about that. You can check out our new design on the website www.littleaussierocketstoves.com but we are planning to release a slightly smaller version that also folds sometime this month and it will be a bit cheaper. These are both 2mm stainless steel, unpainted. Thanks mate
An insulated rocket stove doesn't make the wood last longer, what it does as I understand it is that it reduces the inefficiently of an open fire it increases the efficiency by localizing the Heat and once the flu becomes hot enough it super Heat's the flue gas increasing the efficiency that much more that is when the smoke stops and when insulating a rocket stove you can put it inside of a modified propane tank for example insulating with either wood ash, or a mixture of (refractory cement with either vermiculite or a perlite blend) you can also during the construction of a rocket stove build in an ash dump clean out in the back of the stove.
What if you made the angle a lot sharper where the wood is put in and kept the original hole on the bottom for the air flow. Basically making it gravity fed. Less maintenance.
Nice small Rocket Stoves. I've built 3 Rocket Stoves so far, but mine are a lot bigger. I think a small one like you built would be great to travel with.
Nice! I work as a welder, and i'm thinking of making my own rocket stove, just need some inspiration and ideas + use my own imagination. Want it to look futuristic.I'd have to say, that your welding is very good, looks absolutely perfect!
early examples of rocket type stoves date back 3600 yrs ago the modern version in Ireland early 1900s the kelly kettle... England about the 1920s same as New Zealand with the volcano kettle called the thermette were used for boiling water as well as cooking on top they still make them in NZ we used them when in the bush for work and when we went camping our soldiers used them during ww2 the Germans could never work out why there were black burnt circles at the campsites no secret just making a cuppa and a feed mate lol
Several things to add: there's to be certain height of chimney tube for max efficacy: the afterburner effect for the flammable volatile products of wood pyrolysis, which are burnt while acsending. For 100 mm diameter chimney, it's to be at least 600(!) mm height. Secondary contour as small holes in chimney additionally deliver air for more complete combustion, reducing height for 6-8%. Also, the horizontal feeding tube doesn't allow wood to drop by it's weight into the combustion area. Though these stoves are for cooking seemingly - size and flame! "Perfect" rocket stove works by heated gases only, however they may get to 1000*C = 1832*F!
Thank you sir.
As a fellow welder, I appreciate those welds, first thing I noticed!
I went right to those beautiful welds myself XRP.!!!!!
Welder here. Yeah nice weld. No grinding to clean your weld! I hate it when people do that. 👍
I will try
Nice stack of dimes
I was kind of wondering why he tigged it but I guess if you're good at laying it down quickly it's probably cheaper than using wire.
Finally someone who put it in layman's terms that make it very easy to understand the more complex, thank you.
And that's what passion is called! On your YT channel, from listening and watching you get warmer and happier!
Great video and good explanation of the basics. I like the idea of using angle iron in order to ensure the airflow isn't blocked. I guess the same is achieved by adding a 45 degrees tube or pipe as fuel feeder, which leaves the horizontal arm free for intake of air. Another idea would be to add a small grill at the point where the three tubes meet, and underneath add a sliding pan with its own opening that collects the ash, and can be removed even when the fire is still going, and emptied. I'll know more as soon as I've tried to build one myself. Regards.
Drawing (intake), draft, and exhaust (flue) are all good words to describe the movement of air through a stove.
Your work and explinations are perfect. For an easy add on, weld a small pipe to the top inside of the combustion chamber. This should give super hot air.
6:36 you could make a little cavity on the bottom that could serve as a secondary air intake and an ash dispenser
Thank you for the inspiration to finally start using my brand new welder which has been sitting in our shop for over a year now. I feel like I can make a rocket stove and may experiment with a gravity fed method for “fuel” to add itself in as required for longer cooking cycles.
Whole point of using a J-tube, and with a grating under the burn area, is that the sticks will gravity-feed, instead of snuffing itself.
the L-tube needs constant minding to feed the sticks into it.
KEY to any rocket stove: The riser tube needs to be about double the length of the burn tube section.
Here's what I want: A core-unit that will last as long as possible, that allows somewhat bigger sticks, like a Masonry mass stove does. A J-tube that is sturdy enough it lasts so it can be built into mass we build around it by our old fireplace.
Thank you for your information! I've been doing research randomly learning in and outs about them
Your rocket stove is using the fuel way more efficiently, that’s one reason the fuel last longer.
Would it be possible to add a trap door on the bottom to dump out the ash?
Love the build. Keep pushing the boundaries.
I was thinking of a rod attached to a plate that butts up against the back wall of the upright. You could just pull the rod toward the front to scrape out the ashes. I like your idea too, for a freestanding stove. I'm going to build a rocket mass heater into a cob bench though.
Of all diy videos I've seen, your welds appear to be the absolute best. Very nice craftsmanship! Most others leave their metal parts looking like they're adhered together with chewed bubblegum.
Hi -- my question as a random arm chair pretend expert person: Why not leave the bottom of the vertical tube open so that ash falls out? That might also work as the cold air inlet. Then your fuel tube can be sealed, with a lid that has a spring mechanism to push the splinters as they burn up.
Being a welder myself I have to agree the first thing I noticed was the beads that you ran looks good to me
I want a "U" shape so it can have a verticle feed and firr on one side, chimmey on other side. (Middle section should not be the main burning chamber.) Clean ash out with shop vac.
Your stoves look absolutely beautiful. I would make the chimney longer but i totally understand your explanation why you dont. Your metal looks so great it almost seems a sin to paint it
Love the subtitles that finish the sentences you don't. If you could make an app that did that in live conversation, you would put a bunch of therapists out of work!
I Built a rocket stove from some stove-pipe and elbows, no air-chamber, just feeding sticks as they disappeared. Sounded great and the thin metal glowed red sometimes.
Excellent description and build quality man !. Like your dumbell positioning device. My welding reminds me of one chicken crapping in a box. Thanks. Dave
Rocket stove. Intake =X, Exhaust >X. I think everything you've made pretty much fits that. I don't have a welder so mine are brick, cement, and tin. Dad often told me to utilize my resources. And that's what I do. Love the taste of meat cooked over sticks. I haven't bought gas or charcoal to cook outside with for 25 years. Peace brother.
Most wood stoves exibit the aspects of a rocket stove when their first lit, especially when leaving the door slightly open as the wood starts to light off, and it starts to roar like a rocket,but its impractical to run a wood stove at that level, as the wood consumption would be very high as well as the heat output.
It looks to me like the beauty of the J style over your L style of stove is that it is self feeding.
I like this video, you did a good job and provided a nice, simple explanation
Thank you. Finally some one explained it properly --Nice welding by the way ..Thanks mate.
Very high quality work great craftsmanship and video is very interesting and informative. Good video to watch if you’re looking to build your self a rocket stove. Thanks for sharing mate! Tim in Michigan-usa
After watching loads of yt videos, trying to understand RS technology, I finally got it. Thanks a lot.
RS tachnology?
Great welds.
If you cut into the side of your pipe where the upright pice is ten to twenty m.m. below the wood insert pipe you have a place for your ash.
Also if you put it on a cinder block it will be taller and a small metal can in cinder block is easy to remove and dump.
If I could lay a bead like that I would never ever paint over it, well done.
Wow - That weld bead at the beginning of the video looks awesome. Quality like that = long lasting rocket stove.
Maybe cut a square hole underneath and add a slide out tray to dump ash out occasionally. Could use 2 bits of small L bracket as guides and a bit of 2 mil steel as the tray.
At minute 0:58 he says "in my mind, that's the prettiest part." I have to agree. Those are beautiful welds.
Maybe expand on the principles of Gasification primary and secondary burners
and why a highly insulated (2nd burner with added air feed) high temp combustion chamber for the wood gas enable complete combustion (heat generation) of the wood stock. ie Highly Efficient.
I know this has been out a couple years but you are very informative and I have learned a lot from you Thank you. Also would love to have one of your hot water tanks for an off grid hot tub
im thinking of building a conventional block bbq in the back yard but also incorperating a large rocket stove into in to use as a wok burner etc , would u have any ideas on the design and best way to incorperate it into the bbq , thanks i really like your work that pressure cyd stove / hot water system is a beast
i like the "V" fuel tray i would enlarge it to the back wall of the chimney and eventually made of steel mesh instead of solid V steel stock for better ventilation and holding the bigger embers over the air stream.
That was the clearest, most concise explanation I've heard yet! Thank you.
Nice explanation on stove function, I made a double burner rocket stove along with a hot plate attachment, it has a on/off flap if your cooking on one side, a air control door for flame control, and a slide door at bottom for ash also use for secondary air flow. But nice small stove and info thanks for sharing.
VERY nice build quality. You could use them as axle stands when you aren't brewing a cuppa...!
when I was 11 I now realise I made basically what was a rocket stove (or furnace actually it was that imposing!) The bottom section (horizontal) was made of bricks fastened with clay, the chimney was made from a 3 foot section of steel gate post about 4 x 3 inches.That thing was scary it roared so much and was red hot at times great big blue/orange flame shooting out the top
I read somewhere about the designers of high performance steam trains, they uused a secondary burning chamber for better fuel efficiency. I think some top range woodburning stoves use the same principle, recirculate and burn the smoke
That's cool! Thanks for sharing.
i light mine and walk away for 1hr !! wood port at 50 degrees, would slide in automatic, (gravity) air intake below the wood intake.. grid added, acts as a choke, wood lasts 30% longer
Any advice on how to design a hot tub heater? I would like to build a hot tub out of steel and integrate a rocket stove.
You could wrap a copper tube around a hot chimney then pump water through the tube
I think your " improvements " are interesting. Thank you for explaining why you are making them the way you do.
The design of the air inlet at the bottom should be such that all the ash that forms due to burning gets pushed down through it due to gravity. An inclined intet or say upward looking air chamber through which the ash can slip and air can enter. And a mesh separating the burning chamber and the air inlet pipe.
I actually want to try that and have been thinking about just such a design. Cheers.
@@LittleAussieRockets ok sir thank you n regards.
Great explaination of rocket stove theory. I believe that a lot of the makers of rocket stoves could benefit from watching this as a refresher course. Thanks!
I am in Las Vegas, NV. With all of the construction there is illegal dumping. I went to a empty lot by me with only a lighter found 1-good(chipped a tunnel on one end for fuel) 2-broken cinder blocks used sand as a gasket. Was full steam ahead in 5 min. FOR FREE.
Good vid for rocket stove. Very simple and can use waste oil or anything made from flammable materials.
If you have a build up of ash it's an incomplete combustion. Your dimensions could be altered to make it burn more completely. The flow is the most important part.
Yes indeed 👍 really comes down to what you're trying to achieve. Something small and portable with a shorter burn time or something a little bit more grand. The design on the bench is designed to be as light and as small as possible, but still achieve a usable amount of heat. The runtime is about 35 minutes before you need to start clearing the ash, depending on wood of course.
It's about the same size as the DK Rocket Stove that dosent create ash. If you adjust the air flow percentage to he optimal it burns everything.. Its like a carburetor the ratio is really critical to get the clean burn. The DK also does not require insulation to achieve this. And was the original all steel portable stove design. You might not have seen then as non have been exported to your country but worth looking at that achieve up to 1100c with almost but not quite your dimensions
Thanks for the great video. Good explanation of the combustion issues and I like your flame maintenance slot in the fuel stick tray and classy welding. Keep exploring.
I make tiny light (SS or titanium foil) Aussie stoves for alpine backpacking (described in the links below). They are kind of 'rockety' but, at as little as 500g weight, they don't qualify fully because they have no heat riser (metal, ceramic, round, square or otherwise). However, they have ceramic lining in the hottest parts (to retain heat for initial combustion and protect the metal) and have 'J-style' fuel stick feeders that let the sticks feed themselves into the pyrolysis chamber that naturally regulates the amount of fuel that can be pyrolysed at any time (like yours). The steady plume of wood gas completes its combustion, in the stove box/cooktop/ heater, having passed through a bed of glowing charcoal and air mixing is aided by rapid changes of direction of gas flow within the stove box. The combustion is very clean and efficient (only~400g/hr with no significant smoke or any sparks from the flue pipe). Most of the air enters between the sticks (no separate air path as in yours) and the stove makes a quiet chuffing sound which I think results from the burn rate pulsating during the natural self regulation process. As in your stove, ash builds up at the bottom of the J-tube and restricts the burn chamber volume, but it is slow to accumulate and can be pushed out of the way into the stove box. The useful heat output is from the stove box inside the tent. I view them as regulated smoke generators that burn the smoke completely. I would be interested in your comments and if you think I have a correct understanding of the combustion process.
timtinker.com/ultralight-tent-stove-part-2/
timtinker.com/larger-ultralight-tent-stove/
Tim
That's a really nice stove you have there, very unique and practical. I think you're on the money, I honestly can't think of anything to add or say that you haven't already said. Good job, mate.
very nice design and weldworkk and thanks for sharing the concept/ theory of the rocketstove.
Hey man, thank you from the U.S. I got the idea to make one of these and your videos are in the top best of all the ones I've seen. Thanks from another diy guy.
Hi there.
Is there a reason not to have the fuel input leaning at 45 degrees to allow a bit of self feeding? Assuming a separate channel for air flow.
I like your innovative design, and the stove size is just right. Your on the right path, no worries dude.
Cliff P. Thanks mate
Great production techniques with the text commentary! Good pace, informative! Thanks!
We’re you going to explain the J type pros great welding never stop designing and testing ideas (and prices) love to follow your design’s wishing I still had my mig. How about one with an electric gen attached working off the outlet force
The easiest way to make a rocket stove is, if you don't have a welding machine, to cut an enterance for wood, at the base of a tube - will resemble those built from bricks.
Still some improvements by closing off the fuel input area and putting an adjustable damper on the air feed. Too much air in-rush can actually cool the burn, which drops efficiency. (Idea to burn the secondary gases produced by burning the primary fuel.) Not exactly about maximizing airflow as it is about controlling it.
But I understand this is cheap and simple, so it is what it is.
I appreciate your imput. Thank you
Have you considered a removable-insertable ash pan that can emptied while the fire is ongoing?
Yes, that is in my new design the Dingo Flat Pack, because everyone kept asking for it.
Hi great video, if you angle you fuel intake downwards the wood will be gravity fed that way you can carry on with something else.
Look at the fuel intake, it is already angled downwards. That will help but a larger and steeper fuel intake would keep the fire burning for longer. The problem with the ash build up would however be bigger, but maybe a sump in -built would help?
Brilliant video thanks for sharing and teaching me new skills
I think you are through the apprentice phase Sir. Others have noticed your welding skill as have I. Other people ask whether you sell these as well. I Sir wish I had plans and drawings so I may be able to attempt to duplicate those welds myself. I don't mind having to grind some I can't see and braille welding is the only option. Thank you.
What if you created a slightly modified version where instead of the L shape alone you added a sort of reservoir at the bottom - so extending the vertical part of the L shape below the horizontal part just enough to create a sort containment for the ash? I imagine you could extend the life of the fire this way but perhaps also if you do this and add a trap door you can let out the ash quickly and continue the burn...
Good luck with your stove venture. Those welds looked great.
Beautiful welds, not just uniform but tight. looks like a machine welded seam
Thanks mate
awesome weld!! I use to weld like that high school auto class
I am wondering if you could make a combination woodstove and rocket stove so that it would burn for many hours ??? Would be interested in purchasing one of them from you Little Aussie Rockets if you would get back to me with a quote??? Thanks for the lesson on the ins and outs of this stove. Good Day Mate too.
Very interesting! Thanks for sharing. Have you got a stove primarily for heating vs cooking?
Wow very impresive and also can be improved!! Thanks for sharing
Regular wood stove or fireplace with chimney does the same thing, or can if you adjust the flue, fuel, etc. correctly. Rocket stove does it with smaller pieces. It burns the same amount of wood more efficiently by mixing more completely with oxygen, so less of your combustible wood is turning to gas and then drifting out your chimney (smoke). So a good analogy how it burns less wood, a rocket stove is like fuel injected engine spraying gas in a fine mist into the combustion chamber to mix with oxygen vs. if you just had a big flaming puddle of gas in each cylinder.
Hah, I just recently had the exact same debate about the importance of "how" you burn fuel, air having crucial part in it.. Funny how so many think that only large energy corporations with their large ovens can burn things efficiently and cleanly.. especially energy companies are very resistant towards people making a sort mini powerplants to burn their own trashes and whatever fuel is available really, I wonder why is that.. :D
hi, why don't you use the design that burns the fumes as well?
To get rid of the ash why not place a pull/push rod attached to the angle section with 2 nuts and the rod sliding thru them with a small scrap plate attached to the rod that slides all the way back to the main section of the long side of your 75mm square tube . .At the start the rod and plate are fully in the rear position to clean just pull the rod forward .
Wish you were in the US so I could buy one of your stoves. Nice job!
Agreed. I’d be in for at least one as well. They look very nice, the welds look great and you clearly know what you’re doing. I’d say they’re well worth it.
Wonderful explanation!! Now I've got it!! Thanks a lot!!!
Those cylinder ones @3:25 look cool too!!
Bucking frilliant!
Hey dude. Bead looks great. Keep developing. Loved the video. But since I'm in the U.S. the fire would shoot out the bottom. You know like the water swirling opposite!!!!😅!!!!! But seriously if you could make door / push rod combo that would seal well, could that deal with ash control and help stop / prolong burn time? Would it even be worth the time involved? Good luck
really makes me think of bill mollison design principles...Righteous!!
Does the air flow eventually become hampered by ash blocking the bottom vent. Wouldn't leaving the mouth open give it a longer burn time? And also a place for a excess ash to go? It's just that I have an old one that seems to work just fine. I can keep it burning for ages, which is important, as it gets cold where I am. It also has a few holes drilled into it on the sides at the bottom of the chimney which also helps on a long burn.
Your video is the best I’ve seen so far that explains how a rocket stove works.
Does having the feed on an angle for gravity feed improve it?
Your rocket stove is an excellent design also because you can turn over the rocket stove to shake the ashes out easily.
TIL why the fuel lasts longer in a rocket stove. The other stuff, I pretty much knew the physics of, but I hadn't ever really thought about why rocket stoves are more fuel efficient.
To clean out ashes from your rocket stove ,take a metal spatula and bend the handle so you can reach in with it an scrap out the ashes. It will only take a few seconds to clean out.
Thanks for the explanation, it will help me very much when I built my own👍🏽
How much do u charge for one of your stoves? I live n USA.....also do u sell them non painted just with the shiny stainless look cause thats my favorite .... ,U have made a nice Rocket Stove with some of the best welds anyone could do,very professional quality welds and look
Thanks mate, I'm moving away from this style of stove as it was taking too much time. I have developed a DIY flatpack stove that joins together with twist tabs, which we are selling for AU $200 plus postage and are just starting to experiment with sending them overseas, our first one was Sweden two days ago, and we've been quoted around $80 postage to the US by air freight with tracking, so if you are interested, happy to talk about that. You can check out our new design on the website www.littleaussierocketstoves.com but we are planning to release a slightly smaller version that also folds sometime this month and it will be a bit cheaper. These are both 2mm stainless steel, unpainted. Thanks mate
Mate great work wish you could make a small home heater same as gstove i reckon you would have plenty of interest.
An insulated rocket stove doesn't make the wood last longer, what it does as I understand it is that it reduces the inefficiently of an open fire it increases the efficiency by localizing the Heat and once the flu becomes hot enough it super Heat's the flue gas increasing the efficiency that much more that is when the smoke stops and when insulating a rocket stove you can put it inside of a modified propane tank for example insulating with either wood ash, or a mixture of (refractory cement with either vermiculite or a perlite blend) you can also during the construction of a rocket stove build in an ash dump clean out in the back of the stove.
Well put. Thanks for sharing. 👍
What if you made the angle a lot sharper where the wood is put in and kept the original hole on the bottom for the air flow. Basically making it gravity fed. Less maintenance.
You described a J style with an air intake and or ash removal port
Nice small Rocket Stoves. I've built 3 Rocket Stoves so far, but mine are a lot bigger. I think a small one like you built would be great to travel with.
Hold on, what is most magical are those welds, wow wee - how beautiful! Thumbs up on those superior welds.
Nice! I work as a welder, and i'm thinking of making my own rocket stove, just need some inspiration and ideas + use my own imagination. Want it to look futuristic.I'd have to say, that your welding is very good, looks absolutely perfect!
@CJ there's a vid of a guy building one inside a Jerry can, great project and lots of welding 👍🏻
early examples of rocket type stoves date back 3600 yrs ago the modern version in Ireland early 1900s the kelly kettle... England about the 1920s same as New Zealand with the volcano kettle called the thermette were used for boiling water as well as cooking on top they still make them in NZ we used them when in the bush for work and when we went camping our soldiers used them during ww2 the Germans could never work out why there were black burnt circles at the campsites no secret just making a cuppa and a feed mate lol
Brilliant ! Cheers ! From. NY
Beautiful welding. Is that TIG ?
@dropout0110 no they didnt know what fire was. Only thought it was made by lightning
d
now just replace the wood with hydrogen and a turbo and you have a standard plane jet engin
YOU SAW IT TOO...!!!
Not much of the original project left and the cost to build and operate skyrocketed. So what is your point?
The J style self feeds the fuel. The L you must continue to push fuel in.
@paul beenis , what's the exact measure of the benefit you mentioned?
Nice welds
Is it pissible to make a rocket stove with more than one chimney like a regular stove or a pizza oven connection or aome such?
Yes, I've seen it done, but never tried it myself. Not sure how well it would work, but certainly something worth exploring.
Really clear video on how they are so effective.
Very nice welds, indeed. You say the walls of the stove need to be insulated to keep the heat inside, how do you do it? Thank you.
Great work my big question is how can one get the flames that make contact with the pot or pan more even similar to a gas burner?
That is the million dollar question, which kinda drives all these videos, maybe one day I'll have the answer to that! Thanks mate
@@LittleAussieRockets a diffuser insert of some sort should do the trick. if it works for an open gas flame then why not for wood flames.
My simetry senses are tingling and wanting me to build a radial rocket stove with the mirror line in the chimney
wow, This is the best video I have seen explaining rocket stoves. Thank You!
Thanks for the video...how much? Or can you send me the dimensions? I don't own many tools and don't know how to weld