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Rocket Stove Design

 
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Id like to get some input from any of you rocket stove building gurus on a stove Im building. Im trying to determine on where to place the fuel feed tube. I have looked up a million diff plans but they all seem to be different. I have 2 photos here the two diff ways I have seen them built. I also have the option of cutting the feed tube to go centered into the 90 also but, dont have a picture of that.

Another question is would it be a waste of time to build a grate in the bottom horizontal tube. I plan to add an air regulator on the bottom tube and a full cover on the feed tube.

TY

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rocket stove design
rocket stove design
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rocket stove design
rocket stove design
 
gardener
Posts: 2384
Location: latitude 47 N.W. montana zone 6A
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cat pig rocket stoves
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Hi Scott; Welcome to Permies and the wonderful world of rocket science!

Of your two photo's I think the design in the second photo will work better. The design of the first photo would disrupt the flow in your riser.
Next I will mention that your metal will spall out after a short time, if your stove reaches rocket temps.Until then it will work great.
A grate in the bottom is common for those trying to use pellets, not really needed when using wood.

Do you have a copy of the RMH builders guide ?
What are your plans for this rocket?
What is the rest of your build going to be?
Our friendly crew is eagerly awaiting your questions.
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Our friendly crew of rocket scientist's eagerly await helping you
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These guys are getting your success party ready
 
Scott Myers
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Thank you for the warm welcome and reply. I have been a spectator here for some time now and figured it was about time to join. Ill update my profile soon.

I was leaning toward the second myself. The plans for this build is more of a back up way to cook food in case of an emergency. Plus the 1/4 steel tube was free from our scrap dumpster at work. ( Im a fitter / welder )

I have not bought the book. Currently putting all my extra money into being prepared for emergency situations and to get some land to live the permaculture dream on. Ill prob pick it up when ever I get around to making a rocket mass heater.

I will post a photo and let you know how it works soon as I finish it.

TY

 
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I would put the diagonal feed tube as in this video: https://www.youtube.com/watch?v=3_UXKX1Y1Fw

The video shows how the feed tube is diagonally meeting directly the 90 degree bend, rather than have it shifted back, or shifted up the chimney as your choices.
 
pollinator
Posts: 483
Location: Penticton, Canada
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building woodworking rocket stoves
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Hi Scott,  One thing that I've heard with making an angled feed tube is that the wood doesn't smoothly feed very well. As a kid I remember a slide at the park that on some days you would just stop half way down due to too much friction. Not sure about pellets.
If you do decide to go with the angle, let us know how it goes and good luck with the rest of your build.  
 
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