Rocket Stove Science

Let's delve into the mysteries and science of the rocket stove, don't worry it's not rocket science.

[@alkssmith9762]

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!

[@LittleAussieRockets]

Thank you sir.

[@tricksyhobbitses1695]

As a fellow welder, I appreciate those welds, first thing I noticed!

[@rikray1]

I went right to those beautiful welds myself XRP.!!!!!

[@mwsellox7751]

Welder here. Yeah nice weld. No grinding to clean your weld! I hate it when people do that. 👍

[@narcisorocero7356]

I will try

[@howard977]

Nice stack of dimes

[@UniteForgetLeftRight]

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.

[@LordRa777]

Finally someone who put it in layman's terms that make it very easy to understand the more complex, thank you.

[@witoldolbrych3140]

And that's what passion is called! On your YT channel, from listening and watching you get warmer and happier!

[@crackedemerald4930]

6:36 you could make a little cavity on the bottom that could serve as a secondary air intake and an ash dispenser

[@curtistolman5830]

Any flame that comes out of the top is wasted fuel. It stops combustion and turns to carbon black on the pan, making the chimney tall enough to keep the flame below the top is the right way to make it.

[@TheTobs50]

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.

[@mikeconnery4652]

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.

[@MaxMakerChannel]

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.

[@awaitingthetrumpetcall4529]

You could wrap a copper tube around a hot chimney then pump water through the tube

[@thisguy1520]

Drawing (intake), draft, and exhaust (flue) are all good words to describe the movement of air through a stove.

[@Chimonger1]

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.

[@greyham123]

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.

[@808SBESTCOM]

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.

[@stephenbellini1225]

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

[@TonyGingrich]

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.

[@thirdeye9106]

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.

[@davidhewson1234]

Excellent description and build quality man !. Like your dumbell positioning device. My welding reminds me of one chicken crapping in a box. Thanks. Dave

[@jeffpiper7430]

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

[@tgs989]

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

[@stevewhiteside1818]

Very interesting! Thanks for sharing. Have you got a stove primarily for heating vs cooking?

[@victoryfirst2878]

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.

[@chrisrosenkreuz23]

hi, why don't you use the design that burns the fumes as well?

[@Flightstar]

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.

[@androidcaughtinact69]

Thank you for your information! I've been doing research randomly learning in and outs about them

[@walker1474]

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

[@LittleAussieRockets]

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

[@davekauffman8727]

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.

[@zeroexea]

Would I be able to get help designing a rocket stove heater for a tiny house with a viewing window

[@BlueJazzBoyNZ]

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.

[@TheAntipedy]

Thank you. Finally some one explained it properly --Nice welding by the way ..Thanks mate.

[@Ed19601]

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

[@oddballdynamics.9658]

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.

[@B30pt87]

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.

[@thomasmetzger3447]

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

[@marinoni8864]

3:00 insulated chimney. I don't understand where I can see it in the R.stove you fabricated?

[@HOGRANCHgeorgegabriel9538]

Can you use these indoors for heat . im in northern ca its cold and damp here in the winter. plenty of wood. can you increase the size of this to 5 inch sq tube 1/4 wall ?

[@sannewgen]

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.

[@LittleAussieRockets]

I actually want to try that and have been thinking about just such a design. Cheers.

[@sannewgen]

@@LittleAussieRockets ok sir thank you n regards.

[@mvblitzyo]

Do u ship to the US ? Would like a price quote

[@LittleAussieRockets]

Thanks for your inquiry mate. I will work it out for you and let you know.

[@mvblitzyo]

Super thanks !

[@LittleAussieRockets]

Hi Mate, was just waiting on my parts to come, and now that I've weighed them I've been able to work out that it would be $160 USD total for stove and shipping, which is fully tracked and should arrive in 2-3 weeks. If you want to proceed I'll get down to the shed and make one up for you. Cheers!

[@mvblitzyo]

Little Aussie Rockets sounds great [e-mail] in my e mail just let me know your method of payment

[@JohnDoesItAll]

Can the stove be open at the bottom for airflow and ash mitigation?

[@herminigildojakosalem8664]

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.

[@oswaldbruggemans8474]

Very nice weld , for a forced incinerator , how much ?

[@georgeserrano8354]

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

[@unmissable]

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.

[@theAussieG]

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.

[@markgarate4712]

How far in exactly do you put the bit that holds the wood? I'm going to build one the same as the drum type piece you made. It's pretty good mate. tks for the vid too.

[@LittleAussieRockets]

Thanks mate. The burn plate placement. If you were looking down the riser (the top down) you would just see the end of the burn plate.

[@vicmartinez3711]

Have you considered a removable-insertable ash pan that can emptied while the fire is ongoing?

[@LittleAussieRockets]

Yes, that is in my new design the Dingo Flat Pack, because everyone kept asking for it.

[@Offgrid531]

can we still buy one of these? can it be turned into a mini rocket mass heater?

[@bradlafferty]

Great production techniques with the text commentary! Good pace, informative! Thanks!

[@dubber2001]

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.

[@johnvanegmond1812]

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.

[@tomkelly8827]

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

[@georgeserrano8354]

Can you ship to America? I don't own the tools or know how to weld, and I really like the stove.

[@papuchu]

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.

[@luminouslentil8510]

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!

[@fayezbayzidify]

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?

[@LittleAussieRockets]

That is the million dollar question, which kinda drives all these videos, maybe one day I'll have the answer to that! Thanks mate

[@francois853]

@@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.

[@oldmasteralexmcclellan6443]

Being a welder myself I have to agree the first thing I noticed was the beads that you ran looks good to me

[@bondibeast]

hey great resource you have here. i just have a silly question . if you are building a rocket stove from 100mm box section . how do you prevent rust from the inside?

[@LittleAussieRockets]

The simple answer is you can't. Everything has a service life before it needs to be repaired or replaced. The best one can do, for a mild steel stove is go as thick as possible or use 304 stainless steel. 👍

[@bondibeast]

@@LittleAussieRockets I might go with the stainless because i don't want it to be too heavy , I have never messed with stainless before, will have to watch some videos and do some reading

[@dallasvanve7956]

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.

[@RollingMonte]

Are rocket stove better than cylindrical wood gas stove or are they the same when it comes to efficiency? I have got a cylindric one and it collects ashes with a tray you can remove while cooking , maybe you can figure out something similar

[@andreaseberlein6924]

Your rocket stove has a great shape. Do you sell these models also? Would be interested. Thanks for sharing

[@LittleAussieRockets]

Thank you! Is it this one you were looking at? instagram.com/p/Bd9fAx0DEql/ We call it the compact and it is $150 AUD plus postage. We don't have any at the moment but plan to make another run of them in a few weeks time.

[@ESLinsider]

I want to make a stove for my van. I am interested in something in between a rocket mass heater and a rocket stove. I can't make it very big or very heavy. I like having a heat riser. Also looked at some other masonary stoves and Russian stoves. I want a pipe. heat riser that goes up back down and then up through the ceiling. A normal wood stove just goes up but I think this is a waste. I am a little confused about insulating it. If your goal is to generate heat then insulating it is good or bad?

[@haldyordan2316]

Nice sir! What size tubular steel?

[@LittleAussieRockets]

80mm square.👍

[@tonyv1505]

Where do you sell those rocket stoves on this video?

[@MrKerri888]

Would it be possible to have a separated wood feed inlet at an angle so it gravity feeds the fuel - so you don't need to push it in?

[@LittleAussieRockets]

Yes you could, that would just turn it into a k type rocket stove and it would need to be a lot bigger to work properly, which is why I go with a L type because it can be a lot smaller and still give the desired results. I'm planning a video in about a months time of J v K v L designs, where I will share my thoughts on all three.

[@MrKerri888]

Thanks. I think I'm getting it... K, L and J type rockets to suit different circumstances.

[@UniteForgetLeftRight]

So is it better to have a larger intake than riser, smaller or the same? I'm trying to make one strictly with materials I already have: A old 55 gal propane tank, about 12 feet of 4 inch sch 10 pipe, a old oil tank to cut up for flat plate material and 10 feet of 6 inch chimney pipe with a 90 elbow. Not sure if I want to use the chimney pipe or not but I have it. I was thinking about making the vertical feed tube a large box around 10 inches or so so I can throw whole bags of trash or thick brush in there and tapering it down into a chute to mate up with the 4" air intake pipe. Would making the J tube riser out of the 6" chimney pipe instead of the 4" have any advantages?

[@LittleAussieRockets]

I think that would work just fine, if possible when going from a larger size to a smaller size, try to keep the transition smooth or gradual. That sounds like a great starting place. Love to see a picture when it's done. Cheers.

[@UniteForgetLeftRight]

@@LittleAussieRockets What if the intake was 4" and the riser 6"?

[@ahowl7mx]

How do you buy these? Don't see a website.

[@superhoriguy3164]

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

[@johnnygee1625]

Brilliant ! Cheers ! From. NY

[@californiadreamin8423]

Beautiful welding. Is that TIG ?

[@cheese3416]

@dropout0110 no they didnt know what fire was. Only thought it was made by lightning

[@atbien21]

d

[@haselni]

Does the increased burn efficiency take care of most of the ash? Or does that collect in the back of the stove?

[@LittleAussieRockets]

It does collect in the back of the stove but very slowly and what I've found is that it self regulates the temperature for cooking, and what I mean by that is, it starts off roaring hot which is what you want and then sort of works its way down to a simmer as the ash builds up and restricts air flow. It takes a good hour before you have stop and remove the ash.

[@gorkyd7912]

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.

[@rossyy94]

is it then also possible to burn it in House ? If there is nearly no smoke comming out?

[@GOLDSMITHEXILE]

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

[@LittleAussieRockets]

That's cool! Thanks for sharing.

[@lucillegriffin9525]

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?

[@LittleAussieRockets]

Yes, I've seen it done, but never tried it myself. Not sure how well it would work, but certainly something worth exploring.

[@FourthMatrix]

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...

[@AchillesWrath1]

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.

[@douglascunningham6319]

You described a J style with an air intake and or ash removal port

[@williambianchi2006]

Good luck with your stove venture. Those welds looked great.

[@jimmartin3833]

Did y'all design a slip in top with a grill and a port to vent the spent air up and out an exuast pipe? Or how anout a slip in thin Titianium dome that deliver's radiant heat with a side vent to exuast the spent air up and out a chimney pipe? So folk's could use it in door's? 😁👍

[@dangerousliberty]

Ran across this 4 years after posting. Just wondering if the feed chamber is at a 45° angle with a vent cut in the the lowest third to provide air would it feed itself?

[@LittleAussieRockets]

We have one now with a 45 degree feeder and it's really nice to run.

was wondering if somehow a vent or chimney could be used in tent or place where you wouldnt want to have smoke in area

[@LittleAussieRockets]

toby ladd there are rocket stoves that can be used for heating and cooking, I am currently working on a rocket stove that will do just that. The build is in its early stages, but if you want to check it out search big little rocket stove build pt1

[@AbdielSalas]

Wow very impresive and also can be improved!! Thanks for sharing

[@thomasflores1831]

Is there an advantage between one or the other regarding the L shaped stove or the J shaped stove?

[@LittleAussieRockets]

Yes the size, the L shapes can be made really compact and still give satisfactory results where a J you have to have a long riser to create the draw to prevent the flames travelling up the feeding tube. It really depends on how much room you have to spare. I prefer Ls as there is less material involved in making them and smaller to post. Cheers.

[@thomasflores1831]

@@LittleAussieRockets Thanks for the feedback, I appreciate it.

[@cliffordsikora9841]

I think your " improvements " are interesting. Thank you for explaining why you are making them the way you do.

[@dp9948]

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.

[@114wildfire]

Do you think a mini mini rocket stove mass heater is feasible in a travel trailer??? My main concerns are WEIGHT and the gasses like c. Monoxide

[@114wildfire]

@little Aussie rockets And space

[@nobueno8652]

Could I make a mini rocket stove with a 2 in square tubing? I want to make one for my remote fishing trips.

[@LittleAussieRockets]

Yes, absolutely. You will be limited to the size of fuel that you can put in it but there's no reason it shouldn't work if you get the ratios right.

[@B30pt87]

That was the clearest, most concise explanation I've heard yet! Thank you.

[@cliffp.8396]

I like your innovative design, and the stove size is just right. Your on the right path, no worries dude.

[@LittleAussieRockets]

Cliff P. Thanks mate

[@kasch7574]

After watching loads of yt videos, trying to understand RS technology, I finally got it. Thanks a lot.

[@firojalam8450]

RS tachnology?

[@timtelemark907]

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

[@LittleAussieRockets]

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.

[@alphaonegx1063]

very nice design and weldworkk and thanks for sharing the concept/ theory of the rocketstove.

[@pauljs75]

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.

[@LittleAussieRockets]

I appreciate your imput. Thank you

[@richardelliott9511]

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!

[@robertedwards1240]

At minute 0:58 he says "in my mind, that's the prettiest part." I have to agree. Those are beautiful welds.

[@das250250]

Based on what you said , why not build it as a T on its side so the ash falls below the air intake into a ash pit ? Also , what is the smallest square tube you have built ?

[@LittleAussieRockets]

I have seen a T done before, it looked ok. I think heat loss could be an issue with such an open burn chamber. Might have too try it out. 75x75 mm is the smallest I would go for a stove of this type, anything smaller wouldn't have the fuel holding capacity. Cheers

[@veritywalker3802]

GDay m8. I have a vortex question for you. DOES THE VORTEX IN AUSTRALIA ROTATE CLOCKWISE? Please i hope you can help. Verity.

[@LittleAussieRockets]

I really don't know. But I am not sure if it would make much difference. Air is not affected the same way water is by gravity.

[@veritywalker3802]

Thank you. Looks like i may have to do some experiments. Oooh and play with fire. I was try to figure the best side to place my air intake for maximum burn. You know go with nature not against her.

[@rocketstovechannel1508]

A vortex rotates whichever way you design it to rotate. This can be achieved by placing baffles at certain angles inside of a round chimney

[@Random-rt5ec]

Wow - That weld bead at the beginning of the video looks awesome. Quality like that = long lasting rocket stove.

[@Stevie671]

Hi, would a cone shaped chimney be more efficient,ie,bigger base for a larger fuel source and smaller exit for concentrated heat?

[@LittleAussieRockets]

I have thought about this but never tried it, it would be a matter of getting the balance right. Too much restriction and you'll slow your airflow and rocket stoves are all about airflow. I would have to do some experiments. Thanks for the idea.

[@apsert]

What thickness metal are your builds?

[@LittleAussieRockets]

3 mm for the most part. Think enough to take the heat, still light enough to be portable.

[@moviehipster]

Why dont you angle the wood feeder so it feeds in the wood automatically?

[@alkssmith9762]

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.

[@DrGreenGiant]

Could you not put a mesh at the base of the burn chamber to let the ash out and air in??

[@LittleAussieRockets]

Ash build up with this one is not that bad. Its quite surprising how long it takes before ash becomes a problem. But what you're saying sounds great , and would be good if you needed to run the stove for extended periods. Thanks for sharing your thoughts. 👍

[@abrahamphilip6542]

If we in case increase the air velocity by external blower does it consume less fuel

[@awaitingthetrumpetcall4529]

Excellent question. Does combustion improve with vortex air flow? Does it improve with a taller combustion chamber? What would happen with a candle in a rocket stove? These questions can only be answered by experimenting.

[@Pastorcounselor]

What idea do you have to remove the ash to keep the fire going? For a pizza oven

[@LittleAussieRockets]

A small metal hook is not a bad choice. It's always good to leave a little bit of ash in the bottom of the burn chamber as it helps to insulate the fire from the steel. So a small hook to clear and remove some of the ash is pretty good. I just hook ash out either onto the ground if it's appropriate or into a tray.