John McDoodle

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since Dec 25, 2015
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fungi tiny house transportation
If only you knew
ontario, canada
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Recent posts by John McDoodle

[quote=Dale Hodgins]Hey John. Do you have a thread concerning that stove. I'd be interested to see it. It looks like poured concrete but I'm going to assume that it's a perlite mix or something else meant to take the heat.[/quote]

I went back in time and found the thread you asked about, its right here in permies energy forums,

Here's the link
1 month ago
I made this one after seeing how popular the basic block rockets and cook stoves were online.  However this one I wanted to make a vertical gravity fed J-tube style, unlike any I've ever seen before as far as the block rockets go. 

You might like this one , heres a link
1 month ago
Thanks, :)  its basically a Jtube utilizing only 3 blocks, gravity fed, most of the block rockets I've seen online are fed from the front and need to be constantly fed.  This one is much better in the feed department, and also has a very short or nonexistent burn chamber, which I've grown to adore over the last 3 years of experimenting with rockets.  I believe the riser makes a great burn chamber, and the horizontal burn chamber should always be super short, since you really want the flames and turbulence in the riser as much as possible
1 month ago
Are there any other chimneys or vents in the building.  Sounds like conflicting stack effect.   Also like Glenn said make sure your final chimney stack is taller than your roof peak.  I just included a cold start section into my latest thread titled Epic EZ 3-Block Rocket Stove BBQ.  Cold Starts are best done deep in the burn chamber as close to or directly under the riser stack.  As Glenn mentioned that preheats the riser and induces the convection flow direction.  Make sure you don't have conflicting stack effect before you worry about possible cold start issues.
  Good luck :)
1 month ago
[quote=Dale Hodgins]Hey John. Do you have a thread concerning that stove. I'd be interested to see it. It looks like poured concrete but I'm going to assume that it's a perlite mix or something else meant to take the heat.[/quote]

Yes i ts full of refractory cement and lots of perlite for volume and insulation.  I do have a build thread on here from 2015 or 2016 I think its called "portable cast core on wheels" or something.  Otherwise I can show you more videos of the build and testing.  It was the 2nd rocket I designed and built myself.  Probly the heaviest and one of my favorites. 

Here I end up happy with using firebricks to create a rectangular riser, in the testing, research and development.

the bell heat exchanger on this model is also made from a repurposed LP propane tank, while the core was cast into a recycled / upcycled / repurposed BBQ base on heavy dury caster wheels. 
1 month ago
Ive done about 5 pellet burning videos in my original compact RMH hybrid.  Pellets work very well but you have to buy them, unlike burning free dead hardwood. 
Here's the latest video.   This bag of pellets was only 5$ and its good stuff.
Video link
1 month ago
Here's an entire video playlist featuring over 55 videos of my own designs and rocket stove mass heater builds I've constructed and tested in the last 3 years. 

Here's the link ,

please help support the channel and subscribe

Have a good day
1 month ago
Here is one of the rocket stoves that I made which anyone can make easily.  Its different than the other block backyard rockets I've ever seen.  My design is gravity fed and cheap and easy. 

Here's a video of constructing and cold starting the EZ 3-Block Rocket.


Please subscribe and check out my Rocket Stoves video playlist with over 50 videos of my own rocket stove experiments. 
1 month ago
Those are awesome examples dale. 

Here's the completed snow plow i made from the discarded heating oil tank

I'm happy with how it turned out.  The only major components i used were the bottom of the tank, a triangular plate, and a 8ft long 2.5" angle iron, 1/4" thick.  Those 3 major components were used and discarded junk from the bone yard  

My cast core rocket stove is also incorporating used or discarded junk.  The core case is an old heavy duty BBQ base on heavy duty casters.

Making something out of nothing is one of my favorite things to do, and its kinda my M.O.  its what I do.  Its rewarding and an affordable way to create and afoord things I normally wouldn't be able to. 
1 month ago