2-minute 6-block Rocket stove

This is a very simple Rocket stove that I made from six concrete blocks in about 2 minutes. I found it to work very well after the initial lighting and it burned clean and hot, very little smoke. I boiled 10 liters of water on it in about 40 minutes and the ambient temp was 48 deg. F. It needed little tending and consumed only a small amount of wood. The blocks never got too hot to touch.

Note the three stones to keep the pot supported - have to follow tradition, ya know. :-)
The cracks between blocks seemed to help by feeding some secondary air to the fire. The triangular shape reduces the number of blocks needed and creates better draft I think. You can see the heat waves coming out around the bottom of the pot - a pot skirt would help keep the heat on the pot and reduce cooking time. Also, the whole thing could be placed on a raised platform to keep from having to bend over so much. (BTW the two weird header blocks are from another project. I would normally just use standard blocks.)

This was quite a satisfying project for so little input and time involved. Let me know if you try it and how it performs for you.

Category:

Science & Technology

Tags:

• Rocket
• stove
• woodstove
• wood
• fire
• cookstove
• cooking
• efficient
• clean-burning
• simple
• inexpensive
• appropriate
• technology
• sustainable
• development
• estufa
• casero
• Burn

[ASSEMblerEX]

How do you clear the ashes

[approtechie]

@ASSEMblerEX It's very fast, just rotate one of the vertical blocks a bit and pull the ashes out the back, then rotate it back into place. It only takes a minute.

[iwanderabout]

this seems like it would be a great idea for boiling maple sap to make a small amont syrup for your own use. neat demanstrtion.

[approtechie]

@iwanderabout Good idea! Thanks!

[Solarnowable]

I just wonder why you are just boiling water when this is a perfect opportunity to make some spicy hot sauce!?!? Ha, great stove Cliff, glad to see it up and working!

[approtechie]

@Solarnowable Man, you're going to have to build yourself one and make up a BIG batch of that there harissa stuff so you can flame your innards to your heart's content!

[TheGrayman1234]

Excellent. Easy. Very common man. Love it. Faved and noted for future reference.

[yellowmetalcyborg]

Very nice! I use a wood stove to heat up chemical reaction mixtures but it's massively inefficient and burns wood at an astounding rate. I might try this configuration to make the heating more focused and efficient.

Thanks for sharing!

[approtechie]

@YbborNetsrek Thanks! Yes, I've seen those, but they aren't reusable and you can't really keep them going for many hours at a time like you can with a Rocket stove. Nice for when you're out in the bush without a stove, though.