Hot Water Rocket Stove II - BUILD-

[@jimhood1202]

Why did I fail to come across your video before? I looked at so many before I started my own experiments and this would have helped a lot. I built more or less the same set up with a 200 litre drum and the heat exchange coil from an old copper water tank set into a rough rocket stove made from cement blocks. That got me to where you are here. Then I built a cement hot tub with a capacity of about 1000 litres and made a "coil" from 1" galvanised pipe elbows and nipples. Built another stove from river stone and cement with a stainless baffle suspended in the middle of the coil to force the hot gases over the pipe. It took about six hours to heat the water to a comfortable temperature and of course during that time countless visits to feed the stove. Rocket stoves are very efficient with fuel, not so much with my time. The next iteration was to purchase a 1.25" stainless coil from the US (I couldn't find anyone here in Panama who could bend that diameter of tube). This coil is around 14" diameter with seven and a half turns stacked pretty close together. It acts like a fire basket do I can load it up once the fire has caught then leave it for a hour or so. It takes about two to three hours to heat the water. I found it was important to make sure there's a steady incline from the bottom of the hot tub, through the coil to the inlet. Syphoning is slow but steady with no bubbling. Inlet temp is too hot to hold my hand in but dissapates so fast there's no need for a protective screen. As you discovered, when the flow rate is slow the water in the drum or tub doesn't mix itself and the hot water stays on top of the cold. I usually give it a stir when I'm feeding the fire to see what the "real" temperature has got to. I'm giving such a long comment in the hope that someone else who fancies making an outdoor wood fired hot tub can fast track their project. Good luck whoever you are

[@jarrodheley7879]

The hesitation and steam blasting is caused by the outlet pipe dropping down before the hose connects. The water rises to the top of the coil and is trapped, unable to descend. This causes it to become hot enough to become steam, the expansion of which causes those regular little blasts. A continuous uphill gradient on the outlet pipe will ensure correct operation.

[@Rumrunner009]

Hey! Thanks for sharing that! That's a gem of information!! Thankyou!

[@kathrynrodlun8514]

I grew up in a fab shop, nice welding.

[@phylthamendment]

Need a one way flat valve on the hot side,add water or lower the exhaust below the water line and stuff a water hose on the cold side and get the air out of the coil. Flap valve will keep the heat going one way without allowing any air to be pulled back in another flapper on the bottom flapping to the cold flow Would regulate ebb and flow cycling

[@taoisisis6697]

I've seen that it is possible to refrigerate te tube to turn round....the two parts of the tube must stays underwater,so you don't lose heat and time,someone explains that up here, nice job !🖖🏼

[@manastorobekov935]

В бочке ниже ватерлинии тоже нужно змеевик с трубы нужно ставить. Тогда пар выходящий тоже будет греть воду в бочке. В входную часть холодной воды нужно ставить клапан обратный клапан. Тогда при больших выделениях пара будет воздерживаться давление на выход. Также устроено мойищие паровые аппараты.

[@youknowvin]

My father had a similar rig and we got rid of the sputtering by not having the top of the coil brought back down to the same level as the inlet. We made it uphill all the way with smooth bends and it sputtered no more. On my rocket stove I put a 45 degree chute on the end of it so I could feed in longer pieces. The chute had a lid on it and the combustion air came from the end like your setup. You have some neat toys I wish I had.

[@Super--Star]

I love the way you say everything with such confidence, when clearly you have no idea about thermo siphoning. The hot water line needs to keep rising out the top of the heater.

[@BlueDroneBlues]

You do spend some time being hard on yourself on what people think. I believe you did an outstanding job and you had fun doing it. You have some sweet skills and the end result was very impressive!

[@AJRestoration]

I also have a little daughter and the start of this video melted my heart! You have my like, and my sub.

[@cliffmorgan31]

For best results the thermal siphon needs to be all “Up”, without that steep down slope on the hot side copper pipe. A steam lock at the top of the coiled tube stops the flow intermittently. This project would work excellent with a small flow pump to flow the water through faster, before it forms steam. Interesting project.

[@josoffat7649]

As a plumber, I approve this message. As soon as I saw the outlet go down I thought, uh oh. I was impressed with tig brazing the copper though. I've never seen that before.

[@janholdstein9830]

Am besten eine kleine Pumpe nutzen. Es wäre auch besser das Wasser nicht von oben, sondern von unten in das Wasserfass einzuleiten.

[@jdirthead]

I love that cast iron third hand of yours, so simple yet genius.

[@danburch9989]

It's a common aid in welding circles.

[@williamwatt4497]

Try taking your top pipe upwards to the top of your storage container. Thermal circulation requires cold water entering the lower end of the heating tube and as it heats, the water rises. By returning the pipe down will trap the heated water at the top of the coil. Cheers

[@Chromevulcan]

Hello Erin, lovely to have met you. And thank you for your help.

[@greggwallace7653]

Use a open ended spanner to make the pipe round again. 22mm spanner for 22mm pipe. You can start with a larger size if it's really oval. Just keep rotating it round the pipe as if your undoing an invisible nut until its round again 😊

[@patho279]

Thank's for sharing ! I didn't pound down my computer but LOL seing you doing your heat exchanger-tango. All the copper can bee bend/curved IF you heat it with your torch and cool it with cool water… Every time it harden again, same process...

[@teddyapproved]

Wow! I’m impressed with how efficient that thing is. I’ve seen a lot of different designs of this sort of water heating systems, and this is by far the best one I’ve seen yet. Great work! 👍🏻

[@mazopp8041]

you are a field engineer - not many people rise above thier colledge education and achieve the accredation of innovator ! you are well tooled and know how to use it all. please continue to show us innovations that can free us fro the continued destruction of the world that god sooo much loved .

[@TheGazmondo]

I love this video, as I’ve been waiting for someone to combine the rocket stove with the coiled copper heat exchanger. Well done, and please keep refining this, as I feel there are a few refinements and air lock issues that could really hone this project beautifully. A brilliant first go the best approach, and use of the rocket stove I’ve seen yet , love it !! Thanks.

[@LittleAussieRockets]

We are revisiting this one for sure! Thanks mate

[@fjeinca]

Your hand workmanship is very impressive. Especially to me when you cranked out curves that then closely matched those of your very-round pipes. Well done!

[@fjeinca]

That 3rd hand is also a hoot.

[@jezboyd6004]

Totally brilliant. From a small stove. A great return on your heat. This would be great in a large hot tub. Even in winter. Great for all the family and friends. Great job. Hope to see many more such ideas. Thanks.

[@joycedigiovanni9719]

Your daughter looks just like you! God Bless Your Family!🙂

[@GordieGii]

That's got to be the biggest coffee maker I've ever seen!

[@nyleshintz69]

'Don't try this at home-go to your friend's place' made me laugh out loud. The intro with your little one made me smile remembering when my adult children were that age full of dreams that they have realized today. [Edit] I am a gas fitter btw, great video production with humour and good welding techniques shown.

[@nickbeam5432]

If your no plumber and carpenter does that make you a fabricator ? Why yes yes it does and a good one at that. Great job Sir !

[@astrobreaux]

the upper end needs to flow uphill to a spot into your tank below the water line and above the cold water outlet of your tank. optimum rise is roughly 4 feet high for every 6 feet of distance from the heater. it will heat faster if you only use 3 turns and spread the top and bottom turns as far apart as possible. more pipe creates resistance in your water flow and cools the chimney inhibiting the burn.

[@timbrooks2763]

Nailed it !

[@romilsonmagalhaes6487]

Ele pode reduzir o fluxo da agua, ajustando esse volume. Quanto menos água e mais tempo essa agua permanecer dentro da bobina, muito mais rapido vai aquecer, alem do que vai gerar mais vapor. Eu encontro um erro nesse projeto: a agua ou vapor que retorna quente da bobina deve entrar no meio do tambor, isso é o correto, pois assim nao haverá perdas de calor como está acontecendo nesse projeto.

[@romilsonmagalhaes6487]

Permita eu fazer uma pergunta: Voce fez o teste, fez alguma experiencia desse tipo, e usou espiras espaçadas, digo com mais espaço, e funcionou?

[@thefreese1]

@@romilsonmagalhaes6487 rooster crowing

[@charlesdeering9359]

Hey brother! I was having a bad day and when I clicked on this vid off of one of your other vids it cheered me right up. Once I saw your adorable daughter and heard her speak it put a smile right on my face. I came here from your stainless steel tube rocket stove and the 500 pounder- I must say I love the channel and I'm subscribing, and thanks for cheering me up-God Bless You and your family.

[@buckeyejim2989]

Nice build fellow metalworker. Awesome comments and adorable lil gal to kick it off.👍

[@PatrickRemington]

Just now coming across your version of this! Nice! 😀

[@LittleAussieRockets]

Thanks Patrick. I'm loving what you're doing as well 👍

[@AchillesWrath1]

You got it half right about thermosiphoning. It works because of hot and cold water but it also involves gravity. The water tank needs to be higher than the stove. The lines need to be on a constant upward angle from the stove to the water tank in order to get a good circulation. If the tank and the stove are the same height, and the lines dip it wont work very good.

[@cavelvlan25]

Tried making one of these without this knowledge thinking the boiling water would have a stronger lift effect. Ha. Ha. Didn't do dick. If I used a vac to get it started it would pew pew some steam but that was the extent of it. Decided to make a gas condenser with the tube instead 😂

[@TimeSurfer206]

You also need low pressure check valves, or at least one, to "Gently guide" the direction you want it to go. Else the heated water will try to go up both pipes, and thus won't do nuffin because it's head-butting the cold water trying to come DOWN both.

[@mikeconnery4652]

Thank you

[@antoniocartagena6145]

You guys i think he daid it was a test show. I made mine with a five gallos bucket but electric with a 1500 heating element and all i do is cinnect for 3 to 5 depending on how hot i need the water. Works beautifully for about 15 years now specially when there is no water pressure. But his is nice and i will make one one. Simply

[@brianearley7529]

No not true, as long as the water level is higher than the stove, which with that big-ass barrel, it was probably about two and a half feet taller than the stove

[@raysimon1368]

Nice job that's what we needed growing up 10 people in one house hot water was too long to get

[@edgatternig9729]

Nice to see you again mate! I enjoy watching you weld, something I don’t do well yet but I’m determined to build an outdoor tub heated by a rocket stove. Your videos give me confidence to try my hand at stick welding. Cheers, wish me luck!

[@matthewgilmore5307]

awsome job "mate" as ya'll say down there. very good welding skills aswell ! thats a must have for the off grid. oh, keep your eyes on the little fellers, your daughter is a beauty !

[@larryfromlincolncountywa3989]

I would suspect that, with your outlet still at the top, a 90 degree elbow and tubing straight down and, near the bottom of the tank, either a bend in the tube that matches the circumference of the tank or a couple of 45 degree elbows either-of-which hug the inside of the tank for a few inches, will get the heated water circulating and the temperature uniform (or nearly so) throughout the contents of the tank. Great concept and certainly a lot of admirable craftsmanship there.

[@mcmillanfarms]

Stumbled onto your channel some how or another and just keep watching your videos. When I heard you were a "food-grade grease monkey" I was even more sold. I guess that is what I have been most of my working life (industrial mechanic in a dairy factory) though the last 10 years I have been boiler and refrigeration in the same plant. I have just recently started putting together my home machine and welding shop. Hopefully when I retire in a few years I can make a little side money with some projects. Love seeing your ideas come to life.

[@mrf5347]

Thanks for the professional doing the introduction. Just like my 3 girls!

[@sinrock85]

I liked as soon as your daughter mentioned it. She’s adorbs 😍

[@bobpackard9527]

No part of the OUTLET pipe should dip dow,n if they do, airlocks from. You should take the outlet pipe off, and bend it up and always be rising towards the top of the storage tank, pool whatever.

[@cannabisnewsandpolitics1235]

GREAT video and I agree with the "steam lock issue" the outlet from the stove should be at the top of the coil. FYI if you place the hot water outlet about mid way in the tank with a 45 of better angle to create a circular motion in the water you will greatly increase efficiency and reduce the time and fuel needed as it will mix and create a thermal vortex in the unit. This from a old Chief Machinist Mate USN. Again GREAT video.

[@korishan]

Double agree. The steam buildup actually slows down the process. The outlet should be a couple inches above in the inlet all times. Especially near the heat source. The water flow will greatly increase in speed by doing this too. Also, the outlet (or rather the inlet into the water reservoir, pool, hottub, etc) should be below the water level, a few inches would be fine.

[@Zigge]

I agree. And it would properly also make the stove more efficient if you ad a core pipe that force the gas flow to follow the pipe. The pipe kinda promotes a dead boundary layer along the pipe wall and most of the flow is properly in the center where no water is heated. You could add a second central coil in parallel with the one you got, but it's a tight bend and some interesting welding.

[@GordieGii]

@@Zigge - But that would reduce the cross section of the riser and impede overall airflow decreasing burn efficiency and most likely cause smoking and creosote. You could probably put a baffle all the way up to stop the vortex. That would let the heat rise straight up evenly instead of swirling to the middle. That would probably also decrease burn efficiency, but not as much. I think the best bet would be to put a second water pipe straight up the middle. That wouldn't reduce the cross section very much but it would be in the very hottest section of the exhaust so it would heat the water very fast even though it isn't in the stove for very long. Also you don't want to take *too much* heat out of the exhaust or you will defeat the thermal siphon (convection) that drives the rocket stove effect.

[@Zigge]

@@GordieGii For a non-condensing burner like this, the ideal smoke temperature is in the region of 150C and anything above that is wasted fuel. If the reduced burn rate is creating problems with burn efficiency, the problem is in the burn chamber and not it the heat-exchanger part where the water pipe is located. Insulating and thereby raising the burn temperature should help on that and the overall efficiency.

[@fishmut]

Great job mate ,well done , there is nothing wrong with diy jobs like this, we all got to start somewhere to learn and grow from experiences. This project was awesome thank you for sharing . 👍

[@kevinoneill41]

Had a oil stove with the coil in the burner area so I just went off of how that rig went. Or similer. It can create quite a bit of steam in the line while circulating to heat up a 60 gallon hot water tank. We were releasing air quight a bit.

[@robinrussell3705]

Also heat copper coil till red and quench it with water, annealing it, it will be much easier to work! You’re very talented and and well learned, I don’t think my comments are news to you!

[@neilhay2155]

Good job, Great intro by your little lady.

[@maxy2237]

y not just solder or braze ?

[@billmonb4579]

Good on ya mate from 🇨🇦 ... don’t listen to the people who say you didn’t do this or that right .... because ya know what .... “ it works”

[@topspeed250k5]

Just as the little girl said, you did indeed make it goodly, and it did take quite a while.

[@BobBlarneystone]

Thanks. This sort of thing is what I've had in mind to make a heater for my teardrop camper, in the floor. Your work and the comments below will be useful. But it'll still take some experimenting to determine size and a wood pellet feed system that would last the night.

[@southsideronnie]

I think your top inlet to the drum should be much lower and your barrel mounted much higher than your heater. I have used a coil right in a fire to a bucket mounted on a tripod that was at about 1/2 a meter off the ground. I learned about this when I was a Scout leader at a camp involving Canadian and US Scouts. It is nice to have hot water to wash dishes when you are camping! Great job you have done on the heater! Certainly works well, I'm impressed!! Thank you for sharing.

[@doylepugmire5180]

I built a solar heater a few yrs back (20' x 4', copper pipe every 6 inches, black and in insulated box with clear plex cover) I originally brought hot water upper pipe into swimming pool above water line. It melted the white pvc pipe 2" in just a few hours. Had to bring it in under the water line of the pool then it worked fine and greatly extended swimming season.

[@mxcollin95]

Doyle Pugmire great idea man 👍

[@starforged]

To round the pipe take two pieces of square steel. Put them together and tack weld them. Drill a hole in the middle at the seam. grind the tacks off and separate. Chamfer the edges by the hole at the seam so it won't pinch the pipe. Then put it over your pipe and squeeze it or hit it while rotating the block. This also works on frozen pipe. The warmer the pipe the easier.Thank you very much for sharing this video. You have a beautiful family. Be careful with welding that galvanize. It's a killer.

[@miguelhuesca2551]

Way to encourage your little beautiful angel. Joseph well done.

[@stubidasso4721]

First time in a long time that I've run across anyone with some decent buffer music. Video good too.

[@RightWingNutter]

As a (retired) general handyman who did a lot of plumbing I confess to some reflexive cringing at your copper joining technique. Try buying some silver solder, flux, and a propane torch. You’ll save so much time there will be a large hole in the wall from your beating your head against it from you reacting to the realization of all the unnecessary time and effort. There’s a saying that when all you’ve got is a hammer, everything looks like a nail.

[@LittleAussieRockets]

Well said, thanks mate!

[@lanceroark6386]

3:20ish. That exhaust in the background is beautiful.

[@drmachinewerke1]

I use salt to fill the copper tubing. Also why not wrap copper around the rocket stove. Then add a sleeve over the tubing. No direct flame.

[@jakesgrobler1634]

because the tar/oil ends up condensing on the cold water pipe??

[@edswift4124]

Excellent idea.

[@edswift4124]

Why salt? Finer grit to bend, or easier clean out due to dissolving?

[@willyam9735]

drmachinewerke1, That would work fine but filling the space with sand would conduct heat better between the inner wall and the copper pipe.

[@paulferris2218]

These are the ideas that I am looking at, right on my level, had to read a lot of comments to get here 😅

[@moto.machine1]

I was searching for a way to bend copper pipe into coils because I was interested in turning my woodstove in my home into a hot water heater for my pre-existing radiator system that I no longer use because of the price of natural gas/propane. I'm really glad that I stumbled upon your video because I got two for one! The copper pipe bending, and the stove that you made! My wood stove is cast-iron and much larger. I was thinking of doing a much simpler retrofit by installing the copper tubing coils around the outside of the existing steel chimney/flue pipe and then connecting it into the pre-existing radiator system. I have a pre-existing furnace/boiler designed to use natural gas/propane to heat water and then pump it to the radiators to heat the house. I lose a lot of heat out of the chimney, and I am thinking of wrapping the flue in copper water pipe and redirecting that into the boiler system, and simply disconnecting the natural gas furnace then using the pump in it to then pump the hot water from my woodstove to the radiators. Essentially all I would be adding is the copper coils wrapped around the pre-existing flue, and then tying it into the pre-existing boiler. To make things even easier the boiler is directly below the woodstove in the basement. I burn firewood all winter and it's much more cost-effective than propane. However, I have many rooms that are not heated that I don't use during the winter time or just suffer the colder temps in them. But every single room has a radiator in it. I'm hoping I can do this simple retrofit to reclaim some of the lost heat and make some parts the house a little bit more tolerable. I have a question about the silicon bronze braising for us is just soldering the pipes. I know in your application that you have your coils inside the flu and therefore it must get quite hot. My steel flue has about a 4 foot long exposed section that I want to wrap in copper pipe before it takes a 90° turn and goes back into the old brick chimney. It runs in the 300 to 400°F range. Sometimes it gets up to 500° F. I know that the copper pipe & the water in it will act as a heat sink, so therefore it won't necessarily get as hot as the flue itself. Do you think TIG brazing is absolutely necessary? Will a high temperature solder work? I know how to sweat pipes but I do not know how to TIG braze. I was thinking about leaving the End of the coils quite long after the last bend in the coils so that there's no soldered or brazed joints near the primary heat source. The next worry would be that it would then have to turn 90° and go down several feet into the basement to hook up to the furnace. I'm guessing as long as the pump is running, this won't be an issue. The pump will keep the water moving and circulating. Thoughts? Thanks for the great content! I thoroughly enjoyed your videos!

[@LittleAussieRockets]

Tig brazing isn't necessary, It's just what I happen to have on hand at the time and I wanted to just try that and see how it would work. I think if you sweat them together with silver solder you'd be just fine.

[@willownoel5017]

You can take a old copper car radiator and put it on an old window unit air conditioner case. Attach water hose connectors and build a fire under it. Quick cheap easy hot water heater that will boil out all the hot water you need fast!

[@tomdorman2486]

Great job! You could use an automotive heater hose and metal conectors to keep the flexibility.

[@darrinmoneer8518]

Best entro ever! never watched your channel before, WILL STAY NOW TO CHECK YOU OUT

[@boydwoodgyer2139]

Hey ya Bro 😎 . You are producing some awesome rocket stoves there & you are thinking outside the square . Good stuff . Cheers 🍻 , Woody NZ🇳🇿 .

[@keymad4]

Your daughter is adorable.

[@rowanbrecknell4021]

You can never have enough scrap the limit is the room you have to store it. When you are making things that little bit of tin can make or break the job. It is all about bending the scrap in to something usable. My Uncle who is a fitter machinist always said the valuable metal is in there. Stay within specs it is valuable. Cut out he spec and it is in the bin. Good to see your work. I might be able to tig braze but I would just whip out the oxy and silver solder. You are a master mate.

[@miastory247]

really interesting watching the metal work and planning. i recently finished building a sailboat and a lot of your tool usage is parallel to what i did. the worst thing about handbuilding an epoxy and foam sailboat is the metal fittings. i have a swivel mast and trimaran folding apparatus. most of the metal is aluminum and i had it fabricated by a friend in a nearby town. i got to watch him enough to see the process. a lot of the metal parts i had made i think could be done with carbon fiber or some combination of metal and cf. i will try to watch more as i think your knowledge will come in handy! also the planning of parts is intriguing. i'm working on a second smaller boat using all my own planning and its quite like watching you scramble putting together the stove. cudos. another thing is i think a few courses in metal shop might be appropriate for me. i have a masters in ceramics and have worked a lot with gas and copper and with stainless bending in sculpture. art isn't all a lark is it? sometimes you learn some very practical things in art school. the best larger bead i ever saw laid was by a girl who had a jewelry background. it was beautiful. and so was she. thank goodness for art school!

[@macplumber]

I'm a Plumber with 39 years experience.... I had to get a new keyboard after this video mate. Just kidding.... great build bud.

[@TerryTerryTerry]

A goodly introduction - well done that girl.

[@BowenOrg]

AWESOME JOB BY YOUR DAUGHTER!!!!!!!!!!!!!! : ) PLEASE TELL HER SHE DID A GREAT JOB.... AND SHE SHOULD DO A LOT MORE... AND SUBJECTS OF HER OWN!!! Amen Retired, Veteran

[@zalmirmedeiros9768]

Saudações do Brasil! Seu projeto é fantástico! Parabéns!

[@kathrynrodlun8514]

Ok, you got me! That little girl is so smart and adorable!

[@peetsnort]

Keep up the good work on water heating. The more you experiment the better the efficiency of water boiling. Because water is so vital for cooking. I use lots litres of boiling water to cook. Not to mention the sterilisation factor when camping. Excellent work

[@franks4973]

Your daughter is so cute and completely upstaged you ! 😊

[@almosthuman4457]

You can weld copper very easily with dc and a good preheat. Sweat fittings like those don't even need filler. If you blow a hole, fill it with electrical wire.

[@tigerking2179]

I have seen them bend pipe like that using water and freezing it. It also works like the sand, maybe a little better because the ice is harder. I have always loved rocket stoves, cool build.

[@snowflakemelter1172]

Er, a thermo syphon system has to have the hot outlet pipe rising , vertically is best, at least at an angle, heat won't naturally travel downwards . The hot water tank has to be above the level of the boiler. The bursts of steam are the system fighting against itself. Your system requires a circulation pump.

[@roberthodge2771]

Straight up within 3-5" of the boiler will stop the stem spurts for sure. Use Hot water plumbing plastic pipe or copper.

[@CncObsession]

Yes his use of a down pipe creates the problem IMO. I wonder if the 90 at the top was removed or rerouted to up or level if the bursts would minimize? @@roberthodge2771

[@calysagora3615]

It will work just fine if he just remove that tube going downwards on the coil outlet.

[@tedries4746]

Rufus Chucklebutty m

[@homayounshirazi9550]

Agreed! Small Circulation pump is necessary to avoid air lock! If the water boils(and it will outside of a closed system) the pump will propel the hot water forward.

[@laserfalcon]

You need a thousand thumbs up per view from that great introduction

[@LittleAussieRockets]

thanks mate!

[@mrglasecki]

Cap both ends using a schrader valve compress to 100-120psi 😎 Though hot sand makes bending PVC ever so easy

[@daylight5500]

Congratulations on your new young spokesperson.

[@decoy2636]

Good job. Two things I would enter are a statement and a question. First years ago I was taught to use sand to bend heavy wall drawn boiler tube by capping one end,packing sand and then capping the fill end after that. Then clamp to a sturdy table,beam or column and heat with a rosebud while more people pull in the direction of the desired bend using a cheater pipe of a larger diameter. We only bent tubes in field construction on rare emergency situations. Only when a major shop could not get the bend tubes made in time. Mega Watt output vs boilermaker wages and you win. I had no concept of really how much things cost but when the demand for steam is there money is no object to get a boiler fixed. You did well using sand I heard ice does well if you do not use heat to make bends but I have no experience with ice as we used a lot of heat.

[@LittleAussieRockets]

Thanks mate, I love hearing these experiences that you guys have been sharing. It's great to hear from the guys who have been there and done that and not just the keyboard warriors. I'm going to do a video soon where I try ice, salt and nylon greased rope to bend the copper pipe.

[@leewalker5996]

I wanted to make a heater out of a beer keg. And yours gave me some good ideals like building the rocket stove through the middle of the keg. Great job 👍🏻👍🏻

[@clivegreenall309]

Thanks for this video. I never imagined the complexity and science behind what, at first, looked like just a clever idea. Thanks also to all the responders. I learn a lot from the comments (both positive and otherwise) All the Best for 2019 to you all. Regards from S Africa Clive

[@spicer41282]

Your welding skills are on point and spot on! (pun intended) 😀 Nice make and build!👍 Thanks for recording & editing all the details and uploading.

[@matthewtscott1]

Have a look at how they configured the boilers in steam locomotives, you'll find better heating efficiency using parallel pipes as heat conduit running through a small water tank. Also your storage tank may be more efficient if you draw the heated water from the top back into your boiler, alowing reheated water ( from the top of your boiler) to preheat the bottom of the storage tank as it flows back in.

[@radargenta]

yes Matthew, i think like you.

[@bruceessig3350]

But would the weight of the water slow/ stop the water flow? I think water has 1/2 lb of force per ft... I think.

[@revmsj]

Tug brazing! That’s hilarious! I’ve never seen that happen before🤣 BTW, I love your little 3-legged weight work piece holder thingie! That’s cool and I want one now…

[@roots8924]

Great first build!!! Great tips from the viewers also! Thank you everyone !

[@Alexandreaparecidomunhoz]

some one tips: if you want hot water with less time, instal a pipe in the outlet of water inside teh tank, causing the water to be heated to enter a higher temperature. (suction pipe at the middle the tank). Less water for heating, less time to do. If you need more hot water but do not be in such a hurry, you can put the inlet and outlet the water of the tank about 10 cm from each other on the bottom of the tank. In this case, basically, what changes is just the hot water intake going down. So, the water that is already warm will rise and on the way, tranfer the heat to the water of the tank. I like your videos.. from Brazil...

[@franciskennedyappiah9627]

I don't have materials to do this job,can U make me one to pay for it?Am a pensioner in Ghana

[@sodster68]

Love that your kids participate. Great vids thank you so much!

[@reltub20001]

For self feeding of the wood, feed it through the top and put a damper on the bottom where you are putting the wood in. Leave the door closing the bottom with the damper so you can open it and clean out what dodnt go out the chimney.

[@jessetheridge-xc7sk]

What a brilliant build, You are blessed with such great abilities, thank You.

[@TokyoCraftsman]

Here in Japan we have this kind of rewarming bathtub, using natural gas of course, but the outlet is always about 15cm below the top of the water level, and in fact the tubs have a warning label on them saying that you must keep a good level of water above the outlet to use the reheating function. Also they do not recommend being in the tub when reheating the water. I have a TIG welder but I've got next to no time on it, I need to learn how to TIG weld, I do MIG and stick, but the TIG for many things looks oh so very useful. Your rocket stove looks great, well done! Subbed. Cheers from Tokyo!

[@shaneomacgardner4034]

this is the biggest pop pop boat I've ever seen... 😆 Awesome work 👍

[@LittleAussieRockets]

I have actually been thinking about making a large pop-pop motor. Maybe for a canoe that would be rocket stove powered? I don't know how big the motor scales though.

[@ronaldforfar3283]

Inspirational! Wonder if this could be scaled up to run underfloor heating or a sort of Roman hypocaust system? Beyond my skill set at the moment. Well done.

[@MrJbaker020]

Great build. You could use automotive water hose for the outlet.

[@talleyrand2739]

great job and welding OH i wish i could weld like you, had a Carmichael stove for years on the farm with a wet back, the header tank was on the roof same sysytem ,no pumps for those that reccomned a pump,the tank had a sherpards crook as a saftey should the water get to hot,and would return excess water back to the tanks,NOTE no pumps for those again who claim needed ,this stove and many like them were in their 1000s in Australia ,just a matter of keeping the header tank full where there was no power was done with a semi rotary pump ,if power then the water pressure pump took care of that ols aussie saying you done well son

[@LittleAussieRockets]

Thanks mate, to appease the pump crowd I have put a pump on the stove which circulated the water so fast that it was not able to heat it. Still working on the 2nd version of this stove, which is a very different animal to the first one. Thanks for sharing, I appreciate it.

[@JimmyStewpot]

@@LittleAussieRockets use a car radiator thermostat that also controls the pump. When the waters at temperature it opens, turns on the pump and let's water flow. It also has an inbuilt safety mechanism in that it won't close when it's too hot. You could also put a pressure release valve for safety.

[@thebobis100]

Nice job! This could have so many possible applications.

[@csmeado1]

After you bend the copper pipe, use an adjustable wrench to true it back to a circle. Set it to the right diameter and run it around a few times.

[@carlagoncalves9858]

Top of the coil is full of air. The coil outlet bending down is no help on a thermodynamic system.

[@antoniol1776]

I'm new to your Channel and I enjoyed your video very much. You're quite a Fabricator and a TIG Welder. The design that you created I'd say it's right up there with the Inventor Nikolai Tesla.

[@ddskimmer]

Great video man thank you! Great craftsmanship on building the rocket stove water heater. I enjoyed your video and have subscribed...looking forward to more. Your baby...so adorable...thank you for sharing her with us...God Bless you and your family. You are an exemplary man for all of us to mimic. Much Love to you and your family, and thank you for your generosity.

[@LittleAussieRockets]

You're making me blush, thanks mate!

[@jacqueskisling8241]

Add a swing check valve to the inlet side and cut your heating time in half

[@lindonwatson5402]

Nice! wish I had one for my off grid cabin.

[@kenknutson1598]

Your outlet is reversing flow after the gout of steam. A clear section of pipe would show flow direction. If the outlet came right off the top you might not get a build upon steam on top of the coil.

[@WarrenStiggs-ji5mh]

Never the less excellent and very interesting build,,,with great editing..... realize this video is four years old i just found it ..and based on this one video im subscribed and looking forward to seeing more .. Here's to much success to you in the future my friend...

[@garystinten9339]

With having to cut the copper pipe.. leave the leg being passed through straight up and then cut the pipe when pipe has been fitted and finish off the bend so it coils just as you want it..

[@simontemplarGB]

Pretty impressive for such a small device and a few twigs.

[@theyoudowhatman2345]

Hello from the USA. Great Video intro. ***"Sweet"*** I really enjoyed your build. I'm going to attempt something similar. I learned a lot. I am grateful for that. Believe or not, I read all of the "bloviators contributions" saying, you should do it this or that way. You handled it very well. It reminds me, walking by a construction site seeing a group of men watching the man that's actually doing all the work. I heard that down under, your toilets flush counter clockwise. If so, maybe your pipes are hooked up perfectly. Thank you for you for sharing your video!! Looking forward for more. Liked & Subbed!

[@spiroketal7024]

Ha!! Love the clamp!!! I got weights, just like those, rolling around the yard. I used another flat, light weight as the lid for a rocket stove that I built to heat my greenhouse:-D

[@TheShack444]

Hi nice work! but problem with steam is caused by the drop in the outlet! the hot from the stove, because it dips down, it is causing an air lock, in the coil, the outlet should rise steadily upto the tank. and enter half way up! and cold from the bottom of the tank. back boiler with an airlock can blow up. and possible scalding. hope this helps. good work

[@KimwPerks]

I enjoyed your video. Great to watch another Aussie 👍 A small low flow water pump would stop the steam shooting out of the pipe. Someone may have mentioned this but I didn’t read all the comments. Keep up the great content

[@timkirkpatrick9155]

It would have been vastly easier to solder the thing and the comments on the hot out are correct The steam blowout is the proof of the need to have the hot out flow without boiling. quit lieing to yourself and raise the hot out line. Also use some hot water rated hose or pipe. Very attractive job on the steel! well done. With time the constrained copper will be problematic. just use a standoff.

[@Garryck-1]

Good to see you wearing your Kiwi Safety Boots while welding that pipe to the bench!