Thanks Dave. I built your stove and it does exactly what you say. I solved a lot of minor draft problems with 4 metre chimney and a Ppotty cowl. Lovely rocket sound even under no wind conditions. It eats pellets for breakfast and I'm very pleased with it. I think part of the pleasure is tinkering and experimenting especially with the door gap. Mine seems to like 30mm with the little angle piece in place. There is so many variables and even the outside air temperature and density has an effect. Best to study the flame in darkness to see it's path. Too much air inlet seems to cool the fire and darkens the embers so as you say that gap is important. I think it's something to do with the venturi effect and the control of it but that's part of the fun. I am Really pleased with it. I built another log burning Rocket Stove from old gas bottles that uses your style of brickettes and they work fine. I would never trust using either of my Rocket Stoves in my main living area but they do a great job of heating a couple of sheds and it's true they don't produce any smoke out of the chimney.
David you have to put the circulator pump on the inlet coming out of your radiators and going into your heat exchanger in the stove. This is how all hot water circulatory heating systems are setup. The heat coming out of the stove or a furnace is too hot. The water coming back from the radiators is much cooler. Your circulator will last for years once you do that. That is why this is done. Hope this helps.
Hi Dave,I have built your stove.It works brilliant! Too good!Draws like a vacuum cleaner on steroids! Have been trying to calm it down aNnd suffer the blocked grate syndrome as well. Not a big problem.I have also built a second with 16 tube heat exchanger,all welded.54 butts,tested to 6 bar,no leaks!I am a coded welder BTW. Built the first to learn from,still have to finish the second,with the second i am going to make a longer grate as the ash flys over the grate and fills the burn chamber.Its all a learning curve. Damper,great idea,will make one tomorrow and give it a go. would like to send you some photos or a vid,how can i do that?
@@MiNeYoursChannel Its not larger,still 4" box,havent got round to sending pics to David yet,Sorry David.Just been very busy.Not a computer geek,and will make a small film and send it to David,maybe he will post it for me. I would'nt go too big,they pump out an amazing amount of heat,28 C at the moment here,too hot! Thank you for your interest.
djyul sorry I totally miss read your post, I was looking for go joes I think. It’s to heat a fairly large workshop, out of interest how many rads and what size do you have running off yours? How big is the space it’s heating roughly? Cheers again.
Hi Dave, I built my stove from 6"x6" square tube. After seeing yours I changed it and made it more like yours. Mine is a mass heater, heating an old hot water tank. The major problem I have is after I light it the temps come up easily and really high then taper off the longer it burns. Ive had the top of my tank upwards of 850°. Any ideas how to get more even temps through out the entire burn?
Hi Dave, I have built a copy of your stove, it works great burning between 250C and 300C along the burn tunnel. The only issue I have is the feed tube is getting very hot and is causing the pellets to start to sweat and cause a sticky black oil like film on the inside of the feed tube (much like creosote) the bottom of the feed tube gets up to 200C and half way up its still over 100C the effect of this is loads of smoke from the pellets that get so hot, I have cured the smoke by closing off the top of the feed tube once I have filled it but is there anything you can suggest? does your feed tube get so hot when burning pellets? Thanks in advance Keith
Hi Dave, After watching all your videos I have a few questions. You have stated that the horizontal burn tube must be 4 times the tube dimension. Is that the outside dimension or the inside dimension? I just purchased 6x6 inch 1/2 wall tube, so 5x5 inch inside. Is there any issues with making the burn tube longer? The first vertical section where your heat exchanger is located, is there a minimum/maximum height that should be? You have stated the chimney needs to be minimum of 3 meters high, is there an issue with taller and larger? I have a free source of 8 inch pipe, would that be too large for my 6x6 stove?
the burn tube is inside dimension.no issues with making burn tube longer.the heat exchanger should be the same length as the burn tube.no issues with length of chimney.8 inch pipe probably work but not as efficiently.
Thanks Dave. I built your stove and it does exactly what you say. I solved a lot of minor draft problems with 4 metre chimney and a Ppotty cowl. Lovely rocket sound even under no wind conditions. It eats pellets for breakfast and I'm very pleased with it. I think part of the pleasure is tinkering and experimenting especially with the door gap. Mine seems to like 30mm with the little angle piece in place. There is so many variables and even the outside air temperature and density has an effect. Best to study the flame in darkness to see it's path. Too much air inlet seems to cool the fire and darkens the embers so as you say that gap is important. I think it's something to do with the venturi effect and the control of it but that's part of the fun. I am Really pleased with it. I built another log burning Rocket Stove from old gas bottles that uses your style of brickettes and they work fine. I would never trust using either of my Rocket Stoves in my main living area but they do a great job of heating a couple of sheds and it's true they don't produce any smoke out of the chimney.
Thanks again Dave! I really like your design, and you do a great job of explaining it. Much appreciated!
David you have to put the circulator pump on the inlet coming out of
your radiators and going into your heat exchanger in the stove. This is
how all hot water circulatory heating systems are setup. The heat coming
out of the stove or a furnace is too hot. The water coming back from
the radiators is much cooler. Your circulator will last for years once you do that. That is why this is done. Hope this helps.
Excellent point!!!
Nice design, I’m gonna use it for my first stove project. 👍
Have fun!
Nice stove. Do you think it would matter if the damper was in front of the burn basket rather than behind?
Hi Dave,I have built your stove.It works brilliant! Too good!Draws like a vacuum cleaner on steroids! Have been trying to calm it down aNnd suffer the blocked grate syndrome as well. Not a big problem.I have also built a second with 16 tube heat exchanger,all welded.54 butts,tested to 6 bar,no leaks!I am a coded welder BTW.
Built the first to learn from,still have to finish the second,with the second i am going to make a longer grate as the ash flys over the grate and fills the burn chamber.Its all a learning curve.
Damper,great idea,will make one tomorrow and give it a go.
would like to send you some photos or a vid,how can i do that?
send pics to email sun21tug@gmail.com
Djyul can you put up a tour of your larger one, currently planning out a 6” very similar to this one would be very keen to see yours.
@@MiNeYoursChannel Its not larger,still 4" box,havent got round to sending pics to David yet,Sorry David.Just been very busy.Not a computer geek,and will make a small film and send it to David,maybe he will post it for me.
I would'nt go too big,they pump out an amazing amount of heat,28 C at the moment here,too hot!
Thank you for your interest.
djyul sorry I totally miss read your post, I was looking for go joes I think. It’s to heat a fairly large workshop, out of interest how many rads and what size do you have running off yours? How big is the space it’s heating roughly? Cheers again.
@@MiNeYoursChannel you've miss read again,my boiler is not finished .
Hallo,Dave about the length of the chimney, 3 meters calculated from the stove, or from the roof? thanx
3 meters from the stove.
Hi Dave, I built my stove from 6"x6" square tube. After seeing yours I changed it and made it more like yours. Mine is a mass heater, heating an old hot water tank. The major problem I have is after I light it the temps come up easily and really high then taper off the longer it burns. Ive had the top of my tank upwards of 850°. Any ideas how to get more even temps through out the entire burn?
try putting a slide damper in the chimney
Hi Dave, I have built a copy of your stove, it works great burning between 250C and 300C along the burn tunnel. The only issue I have is the feed tube is getting very hot and is causing the pellets to start to sweat and cause a sticky black oil like film on the inside of the feed tube (much like creosote) the bottom of the feed tube gets up to 200C and half way up its still over 100C the effect of this is loads of smoke from the pellets that get so hot, I have cured the smoke by closing off the top of the feed tube once I have filled it but is there anything you can suggest? does your feed tube get so hot when burning pellets?
Thanks in advance Keith
you must be using a different sort of pellet that i use.
How many radiators have you got running of your rocket stove
3
Hi Dave,
After watching all your videos I have a few questions.
You have stated that the horizontal burn tube must be 4 times the tube dimension. Is that the outside dimension or the inside dimension? I just purchased 6x6 inch 1/2 wall tube, so 5x5 inch inside. Is there any issues with making the burn tube longer?
The first vertical section where your heat exchanger is located, is there a minimum/maximum height that should be?
You have stated the chimney needs to be minimum of 3 meters high, is there an issue with taller and larger? I have a free source of 8 inch pipe, would that be too large for my 6x6 stove?
the burn tube is inside dimension.no issues with making burn tube longer.the heat exchanger should be the same length as the burn tube.no issues with length of chimney.8 inch pipe probably work but not as efficiently.