• Post Reply Bookmark Topic Watch Topic
  • New Topic
permaculture forums growies critters building homesteading energy monies living kitchen purity ungarbage community wilderness fiber arts art permaculture artisans regional education experiences global resources the cider press projects digital market permies.com all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • Nicole Alderman
  • raven ranson
stewards:
  • paul wheaton
  • Jocelyn Campbell
  • Julia Winter
garden masters:
  • Anne Miller
  • Pearl Sutton
  • thomas rubino
  • Bill Crim
  • Kim Goodwin
  • Joylynn Hardesty
gardeners:
  • Amit Enventres
  • Mike Jay
  • Dan Boone

Rocket has to come back !!!  RSS feed

 
Posts: 145
7
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
The main reason that I removed my rocket stove, was that I had too move the shed it was in....

Kinda hard to pick up a building and move it with a 3 or 4 tonne stove in it. . .

The shed has been moved, but I still want too have heat for the winter, so the rocket is coming back !

20170909_094213.jpg
[Thumbnail for 20170909_094213.jpg]
20171014_164250.jpg
[Thumbnail for 20171014_164250.jpg]
 
Dave Lot
Posts: 145
7
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Trying to figure out how to build a rocket stove, that would heat nicely, but take up as little room as possible.
Then realized, that you can have the "J" tube, which burns nice and hot - without the mass - good for instant heat.
I reduced the amount of perelit insulation from 6 inches - down to 2 or 3 inches all the way around.  (3.5 inches on the bottom of the heater).

Then just for the hell of it, I put it on a heavy duty steel frame - with wheels. 

At first, I tried to limit the length too 1 concrete slab, but I needed extra room for the manifold.... so I added another 12 inch pad at the back.

Riser and base.
20171015_152309.jpg
[Thumbnail for 20171015_152309.jpg]
20171015_155837.jpg
[Thumbnail for 20171015_155837.jpg]
20171015_123037.jpg
[Thumbnail for 20171015_123037.jpg]
20171015_125421.jpg
[Thumbnail for 20171015_125421.jpg]
 
Dave Lot
Posts: 145
7
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Burn chamber is the same size and shape as the first one, just alot less insulation around it, so hopefully, after a 2 or 3 hour burn, it will start too radiate heat, and help heat the space around it.
20171015_141001.jpg
[Thumbnail for 20171015_141001.jpg]
20171015_141230.jpg
[Thumbnail for 20171015_141230.jpg]
20171015_155902.jpg
[Thumbnail for 20171015_155902.jpg]
 
Dave Lot
Posts: 145
7
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
The tricky part, is too set up the chimney so it wont break off....

At first, I tried having it point up vertical , but it kept leaning over . . .  so, I laid it flat, on the body of the stove, and put a bunch of bricks on top.
Should hold it in place.

20171015_183757.jpg
[Thumbnail for 20171015_183757.jpg]
20171015_183858.jpg
[Thumbnail for 20171015_183858.jpg]
20171015_183910.jpg
[Thumbnail for 20171015_183910.jpg]
20171016_102701.jpg
[Thumbnail for 20171016_102701.jpg]
 
Dave Lot
Posts: 145
7
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
So, after building and test burning the heater (all on the same day) it did not surprise me that it did not get over 150 degrees F.  Since I added 8 small pails of water - too soften the materials.  All that moisture is keeping the stove cold.  I have not hooked up the chimney yet, so that would probably not help things either....
Once the moisture is gone, it should start heating up.

20171015_183827.jpg
[Thumbnail for 20171015_183827.jpg]
20171015_142534.jpg
[Thumbnail for 20171015_142534.jpg]
20171015_190127-1.jpg
[Thumbnail for 20171015_190127-1.jpg]
 
Dave Lot
Posts: 145
7
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I really wanted to get this rocket heater done, since the day that I built it was 20 degrees with a humidex of 29.  The very next day it dropped down to 12 degrees.
I would much rather work with mud and wet hands in the warm weather.

That being said, there are a few items that I am going to have too change on this heater....

1. outer bricks do not have any mortar on them - kinda floppy.  Will have top let it dry, and either wait for a warmer day or heat up the shed nice and warm - pull them off, and mortar them together.

2. not much heat riser support - so I may have too remove the bricks at the bottom of the barrel, (the ones that are turned on their side) and lay them flat - more solid and secure, and easier to mortar the joints.

That's it for a while, keep ya updated !
 
Dave Lot
Posts: 145
7
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Here is an update on the wheelie rocket . . .

I went to hook up the chimney, and as soon as I touched the thing, the stove and the chimney separated. ...  bummer.

20171021_140733.jpg
[Thumbnail for 20171021_140733.jpg]
20171021_140748.jpg
[Thumbnail for 20171021_140748.jpg]
20171021_140755.jpg
[Thumbnail for 20171021_140755.jpg]
20171021_140805.jpg
[Thumbnail for 20171021_140805.jpg]
 
Dave Lot
Posts: 145
7
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
After thinking about it for five minutes, I realized, that if you want a good sturdy stove, you have to start with a good solid base....

Too that end, I have started removing the outer bricks, and mortaring them into place - to make a solid frame too work from.

Also, while I have the heat riser off, I am going to be laying the bricks flat - instead of being on there sides, and very unstable and tippy.

Unfortunately, the weather has turned colder, so we will see how it goes . ...
20171025_155814.jpg
[Thumbnail for 20171025_155814.jpg]
20171025_155821.jpg
[Thumbnail for 20171025_155821.jpg]
 
Posts: 97
Location: 6A
13
dog hunting cooking solar woodworking
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
great idea! like the mobile aspect.
 
Dave Lot
Posts: 145
7
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
After taking apart the hastily built mess that I made, I took my time, and mortared all the surrounding bricks with high temp brick mortar.

After that, it was just a matter of building up the surround for the manifold, and topping if off with a slab of concrete.

Added a few more bricks too weight down the chimney placement ... so it wont move too much, and did a small test burn.  Warmed up the stove, to help it dry out, and checked for leaks.
20171025_155814.jpg
[Thumbnail for 20171025_155814.jpg]
20171105_191955.jpg
[Thumbnail for 20171105_191955.jpg]
20171105_143550.jpg
[Thumbnail for 20171105_143550.jpg]
20171105_143457.jpg
[Thumbnail for 20171105_143457.jpg]
20171105_191932.jpg
[Thumbnail for 20171105_191932.jpg]
 
Dave Lot
Posts: 145
7
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
After a week of sitting in the shop, it was time for a full on burn.

No leaks, and very good draft.  6 inch pipe thruout the build.  The one thing I did differently is too make the entrance to the burn tunnel .5 of an inch smaller in one direction.  That increases the draft in that area, and I can now load up the burn chamber as full as it will go, and I have no smoke back or back burn issues at all (so far).

I also find, that the 4 or 5 feet of bare chimney pipe is losing almost as much heat as the mass was absorbing.  I know that I cannot tell what the inner temperature is on the stove pipe, since it now gets hot enough to melt the regular stove thermometer I was using, but the new chimney thermometer I picked up, is telling me that it does not get over 200 F . I do notice a difference at the top of the chimney outside, as there is no smoke, no steam, nothing to see - as if the stove is not even running.

On the plus side, with that large slab of concrete covering the manifold, my coffee stays hot ...

20171111_130903-1.jpg
[Thumbnail for 20171111_130903-1.jpg]
20171111_130856.jpg
[Thumbnail for 20171111_130856.jpg]
20171111_130301.jpg
[Thumbnail for 20171111_130301.jpg]
20171111_130014.jpg
[Thumbnail for 20171111_130014.jpg]
20171111_130033.jpg
[Thumbnail for 20171111_130033.jpg]
20171111_130055.jpg
[Thumbnail for 20171111_130055.jpg]
20171111_135600.jpg
[Thumbnail for 20171111_135600.jpg]
20171111_143331.jpg
[Thumbnail for 20171111_143331.jpg]
20171111_143350.jpg
[Thumbnail for 20171111_143350.jpg]
 
Dave Lot
Posts: 145
7
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I had to urethane some window frames out in the shop.
So, I went out at noon, and fired up the portable rocket heater.
At noon, it was 28 degrees F.  By 1 pm, it was 40 degrees F.  By 3 pm, it was around 65 degrees in the shop, and I started urethaning the wood.
After that, it quickly reached 72 degrees, and I had too open the door too cool off.

In total, I used 8 pieces of 1.5 x 1.5 x 36 inches plus 2 - 2x4s - 48 inches long - as a test for back burn - there was none.

It works.

Edit.  After burning the stove full out for most of the afternoon ( 5 hours or so ), the outer bricks around the fire box ( the ones with 2 inches of perelite inside ) only reached 90 degrees F.  or so.  Perelite is a REALLY GOOD insulator.
20171105_192003.jpg
[Thumbnail for 20171105_192003.jpg]
 
Dave Lot
Posts: 145
7
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
After repeated firings, the rocket heater is now all dried out and burning nicely.
Since I have made the burn chamber .5 of an inch smaller in one direction - there is no smoke back, or puffing at all.

Loading the stove up with cardboard, gets the stove really hot !

This is why I warn people, when building one of these stoves, to leave plenty of room around the barrel.
20171218_181035.jpg
[Thumbnail for 20171218_181035.jpg]
20171218_181045.jpg
[Thumbnail for 20171218_181045.jpg]
 
Posts: 530
Location: Central Virginia USA
27
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Have you actually tried to get this thing on a dolly--or whatever it was you planned to move it with? What do you think the final weight is?
 
What are you doing? You are supposed to be reading this tiny ad!
Food Forest Card Game - Game Forum
https://permies.com/t/61704/Food-Forest-Card-Game-Game
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!