This was my first creation after the soup can experiment convinced me that it would work. It is made from stuff I had laying around. 5" steel tubing for large truck exhaust systems, two ammo cans, and the rectangular burn tunnel is two pieces of angle iron with a 1" piece welded in to get the dimensions I wanted of 5" wide by a little less than 4" high. The 5 gallon cans were a real beotch to weld. I filled the sections with perlite as I went. It seemed to be a bit tempermental with feeding and airflow for awhile at first. It wanted the front cleanout door to be partially open, at least until it had been running good for 1/2 hour or so, then it didn't matter. I am guessing that was due to the time to build up heat in the heavier gauge steel tunnel and pipe. It was still cool to boil a 1/2 filled teakettle on it with just some twigs though! It had a faint rocket sound the whole time. At times it would smoke if things weren't right, other times it was little to no smoke, at least the best I could tell being dark out.
Neat! I think you'll find that it starts and works best with the clean-out door closed tightly. You can get better efficiency for cooking if you make the 3 pot-stand legs smaller so that a cylinder of metal can sit down and around (at least the bottom of) your teapot. The cylinder should sit flat on top of the metal plate. This will force the heat up against the walls of the pot, using more of it where you want it. You could make various cylinders (sheet metal or whatnot) sized for different sizes of pot.
If you will put a lid on the feed tube and fill it with shorter sticks and open the clean out door it will do much better. I have built a similar stove and it made a big difference. www.youtube.com/watch?v=jY8Rky42S88
Very nice. Neat and sturdy for moving, and indestructible. It makes sense that it needs time to heat up the innards, & easy to believe that after running for a while, the output was ferociously hot.
Now you're on to the point of use. Pot skirts, maybe set a heat exchanger atop in place of the pot & skirt?
If you really cram fuel into it now, does it put out a fire running up the inside of the vertical?
Also interesting that for a portable unit, you used the horizontal tunnel and vertical feed (the "J"model). Usually you'll see the short horizontal, leading right to the bottom of the vertical burn tube (the "L"). I'm interested in seeing how short the horizontal can be -getting closer to the "L" while still using the convenience of the self-feeding vertical inlet tube of the"J".
martinm: any one here with info \ experience with heat (from a mass heater) distribution with ducts throughout two storey house ?
Sept 8, 2018 22:58:52 GMT -8
padica: Good morning, this is a wonderful subject, please someone can help me with the theme of double and triple combustion, how it is achieved, theory and design, thank you
Sept 15, 2018 7:13:40 GMT -8
wiscojames: I'm afraid you won't get a response to such a vague question - I suggest reading through some of the threads related to your questions before asking for an explanation. People will be very generous with their knowledge if your question is more specific.
Sept 18, 2018 4:48:00 GMT -8
daniel: in my experience as I am working now on something of that nature, I have thought of making a heat exchanger and distributing the heat through vents using a slower fan. Now after a few years I realize that mass heaters give out primarily radiant heat, for
Nov 30, 2018 12:48:38 GMT -8
coastalrocketeer: Anyone posting in this shout box... if you have something you want people to see and respond to, create a thread in the appropriate forum section... this is not the place...
Dec 16, 2018 18:10:49 GMT -8
vesuvius: High Temperature Glass options,
Jan 4, 2019 16:28:17 GMT -8
vesuvius: Do any of you have experience with using the glass from home oven doors on a rocket stove? I'd like to have a viewing port on my stove but don't want to fork out for new ceramic glass. Any thought as to whether it would take the heat of a rocket stove?
Jan 4, 2019 16:30:40 GMT -8
yaya: you dont need the blowair for that temp..
Jan 13, 2019 16:43:57 GMT -8
flybywire: Glass window from an old washing machine is designed to take high temps. Cheap solution to your need.
Jan 27, 2019 0:10:58 GMT -8
coastalrocketeer: Anyone posting in this shout box... if you have something you want people to see and respond to, create a thread in the appropriate forum section... this is not the place to have a discussion... it is for short announcements
Feb 7, 2019 0:11:23 GMT -8
coastalrocketeer: you won’t likely get replies to questions here, and it is not a spot that makes holding an ongoing discussion possible...
Feb 7, 2019 0:12:22 GMT -8
TexasGonzo: Sooooo glad I found this site! Its always rewarding to find such a super group of folks! To any and all, feel free to PM me anytime. Thanks for having me!
Mar 11, 2019 18:56:41 GMT -8
jlmtech: GADGET: CONSIDER USING A JET PUMP INSTEAD OF A BLOWER FAN TO INDUCE DRAFT; NO CLOGGING.
Mar 26, 2019 8:19:28 GMT -8
michaelegan: i am unable to open the sketchup files on my mac. I used sketchup a few years back but apparently the company now requires a subscription. does anyone have any advice/instructions on how to use the program or how to view pictures without spending money?
Aug 20, 2019 18:41:48 GMT -8
mannytheseacow: michaelegan: download AutoCAD student version for free... import .SKP
Aug 23, 2019 13:33:44 GMT -8
topbaza: hi everyone, been searching all over net and this is were i need to be i think!!
Sept 28, 2019 6:16:25 GMT -8
anounaki: Hi, why I cant upload photos when I make new tread to this forum?
Feb 28, 2020 2:09:40 GMT -8
ahansen: photos under 1 mb not possible?
Jun 4, 2020 0:09:21 GMT -8