I am enthralled with the vortex stove. And am also wondering about ways of tweaking the secondary burn for the utmost efficiency. Seems to me that evoking a more deliberate heat riser with turbulent elbow could achieve that. So i have done up a sketch with the basic idea. (already thinking of better ways to introduce secondary air…)
Pat, this ressembles a bit Matt's angled riser, and there's a smidge of batch box too
My impression is that it could be done a bit more rocket'y style. As Vortex reduced the lengh of his box, may be doing a brick partition at the end of the firebox, with a port; this could be feasible. And then, that space would also act as the begining of the heat riser. Following that, you could do a broken riser. instead of the flat channel with the elbow. A broken riser angled to the front as this flat channel is, but also to the side, to increase the working lengh of this heat riser. Imagine the riser doing a diagonal from one corner to the other, seing the stove from the top.
Mind you, this is all theoretical.
There's one observation from the range retrofit tho, the firebox and port are one size smaller than the heat riser. Firebox loosely based on a 10cm batch, rather short. and the heat riser is 12cm diameter, real short compared to what it should be. May be 67cm iirc. But this thing roars with the 11m chimney above.
Pat, I would think something like this would be worth a try, sounds like Max is thinking along similar lines. Personally I like having the firebox exit at the front it makes for a good show, but I agree some kind of horizontal riser before the fire comes out under the griddle would be the way to go.
I remember viewing your forum post on the russian examples some time ago.
As the rocket batch boxes evolve towards masonry fire chambers… i am not surprised to see Russian examples.
In the heater i am currently building i decided to shape the fire box much the same as vortex has done, but with some trip wires and secondary air concentrated in to the throat. I wanted to make sure i can achieve the slow gasification burn that he can achieve when the primary air is closed. I am close to completion so we shall see.
I do wonder about the pros and cons of having the throat at the front or rear… It is hard to know when something is done just out of habit, or for a reason that no longer applies as variables shift…
Yes i have been thinking of how feeding the secondary air under the front lintel above the door could make for much heat. On the one hand i want the lintel to be hot so the air heats up. On the other, i do not want to thermally stress that piece. I have added fiberglass in sodium silicate to the outer front of it. ANd will add 1/8" ceramic felt to the underside of it (above the metal sleeve across the throat. Hopefully these will help achieve the desired secondary air heat and structural protection...
vimes1984: I've heard about a calculator, does anybody have a link?
Oct 21, 2016 11:00:12 GMT -8
scott55y: Are there instructions for building a casting mold for an 8 inch batch box posted somewhere?
Oct 25, 2016 10:00:18 GMT -8
yellowdog: Yellow , just trying to learn how to post here
Nov 30, 2016 3:44:24 GMT -8
robert1171: In a batch rocket heater does the riser still need to be 2 inches to the bells top?
Dec 20, 2016 9:19:52 GMT -8
robert1171: I am building a batch rocket mass stove. is it ok to make the heat riser out of pro firebrick and in a square design as to a compared circular castable riser ?
Jan 15, 2017 12:29:15 GMT -8
keithturtle: This guy did successfully https://www.youtube.com/watch?v=ZKOm3Qqxns4
Jan 15, 2017 19:29:26 GMT -8
pluton5: witam wszystkich,,,od czasu mojego pierwszego wpisu minęło juz kilka lat i tradycyjne palenisko RS ( rocket stove) zmieniało sie już wiele razy.Zmieniony wygląd i sposób zasilania palnika. Od pewnego czasu zmianił sie też kształt samej komory załadowczej
Jan 24, 2017 10:40:44 GMT -8
tommy: I have a j style rocket stove I am having a hard time getting it to draught right and make the right noise
Jan 24, 2017 15:37:52 GMT -8
esatto: looking for experience with mortar/clay slip experience... 2 bell 7' system ...old solid red clay brick bottom 2/3 of first bell and hard fire brick on top 1/3 of primary bell(above riser) looking for anyones experience with what works?
Jan 26, 2017 19:04:29 GMT -8
jura: @ Pluton5 I do speak polish, but I think the rule of the thumb on this forum is using English.
Jan 27, 2017 4:36:22 GMT -8
jura: @ Pluton5 I believe we are in deep need to use unified RS builder parlance in PL Lng therefore I'd propose to use "dopalacz"(heat riser) and "palenisko"(batchbox) (instead of "palnik" and "komora załadowcza")
Jan 27, 2017 4:41:28 GMT -8
barbalha: I want to build rocket stoves in Spain, where I live. I'll be in Phila. Till Feb. 21. I'm hoping someone here needs my volunteer help so I can learn more
Jan 28, 2017 15:18:03 GMT -8
mickykrovo: I have decided, (after few weeks) to become a "full member" of this great society. I have found it very helpfull so far.
Jan 30, 2017 10:39:37 GMT -8
panos: In order to put the p channel ,you have to make a hole ot the top plate of the firebox ,right?
Feb 6, 2017 7:46:40 GMT -8
cfrith: Panos; Yes directly inline with port with appropriate depth into port and correct width according to peters batchbox dimension chart
Feb 12, 2017 14:38:51 GMT -8
panos: Thank you very much! Have a nice day.
Feb 14, 2017 15:47:23 GMT -8
panos: Can i costruct the bell with this type of brick ? https://www.google.gr/search?q=brick&biw=1242&bih=602&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiEl6uF96nSAhWIFJoKHTiRAI8Q_AUIBigB#tbm=isch&q=%CF%84%CE%BF%CF%8D%CE%B2%CE%BB%CE%BF&*
Feb 24, 2017 15:55:01 GMT -8
panos: i guess these would be good for making columns inside the bell since they have this additional surface area.
Feb 24, 2017 17:59:35 GMT -8